Susumu Ohtsuka

Last Updated :2019/12/02

Affiliations, Positions
Graduate School of Integrated Sciences for Life Setouchi Field Science Center, ., Professor
E-mail
ohtsukahiroshima-u.ac.jp

Basic Information

Academic Degrees

  • Doctor of Agriculture, The University of Tokyo
  • Master of Science, Kyoto University

Research Fields

  • Agricultural sciences;Applied aquatic science;Aquatic life science

Research Keywords

  • Taxonomy
  • Ecology
  • invertebrate
  • Symbiosis
  • Phylogeny
  • fish
  • Mysids
  • Copepods
  • parasite
  • Jellyfish

Educational Activity

Course in Charge

  1. 2019, Liberal Arts Education Program1, 2Term, Introduction to Field Sciences
  2. 2019, Undergraduate Education, 3Term, Seminar in Field Science
  3. 2019, Undergraduate Education, 3Term, Research Front of Applied Biological Science
  4. 2019, Undergraduate Education, Intensive, Seminar in Fildwork on Community Coasts
  5. 2019, Undergraduate Education, 3Term, Marine Invertebrate Zoology
  6. 2019, Undergraduate Education, Intensive, Field Works and Experiments of Marine Fisheries Science in "Sato Umi"the Seto Inland Sea
  7. 2019, Undergraduate Education, Academic Year, Graduation Thesis
  8. 2019, Undergraduate Education, Intensive, Practice on economic marine invertebrates and seaweeds in the Seto Inland Sea
  9. 2019, Undergraduate Education, Intensive, Practice and Field Work in Fisheries Science
  10. 2019, Undergraduate Education, Year, Special Practice I
  11. 2019, Undergraduate Education, Year, Practical Course in Marine Bioscience and Technology IV
  12. 2019, Undergraduate Education, Year, Practice on East China Sea Study
  13. 2019, Undergraduate Education, Year, Practical Course on Fisheries Science and the Marine Environment I-B
  14. 2019, Undergraduate Education, Year, Practice Course on Fisheries Science and the Marine Environment III
  15. 2019, Graduate Education (Master's Program) , 2Term, Introduction to aquatic field science
  16. 2019, Graduate Education (Master's Program) , 4Term, Marine biodiversity
  17. 2019, Graduate Education (Master's Program) , Second Semester, Research for Academic Degree Dissertation
  18. 2019, Graduate Education (Master's Program) , OutOfTerm(1st), Practice in Field Science in Setouchi Areas
  19. 2019, Graduate Education (Master's Program) , 1Term, Exercises in Bioresource Science A
  20. 2019, Graduate Education (Master's Program) , 2Term, Exercises in Bioresource Science A
  21. 2019, Graduate Education (Master's Program) , 3Term, Exercises in Bioresource ScienceB
  22. 2019, Graduate Education (Master's Program) , 4Term, Exercises in Bioresource ScienceB
  23. 2019, Graduate Education (Master's Program) , Academic Year, Research for Academic Degree Dissertation in Bioresource Science
  24. 2019, Graduate Education (Master's Program) , Academic Year, Research for Academic Degree Dissertation in Bioresource Science
  25. 2019, Graduate Education (Master's Program) , 2Term, Fisheries Oceanography I
  26. 2019, Graduate Education (Master's Program) , 4Term, Fisheries Oceanography II
  27. 2019, Graduate Education (Doctoral Program) , Academic Year, Research for Academic Degree Dissertation in Integrated Life Sciences

Research Activities

Academic Papers

  1. Zoogeography of pelagic copepods in Japan and its adjacent waters, Bulletin of Plankton Society of Japan, 46(1), 1-20, 19990401
  2. Three new species of the demersal calanoid copepod Pseudocyclops form Phuket, Thailand, Plankton Biology and Ecology, 46(2), 132-147, 19990401
  3. Introduction of the Asian copepods Acartiella sinensis, Tortanus dextrilobatus(Copepoda : Calanoida),and Limnoithona tetraspina(Copepoda : Cyclopoida) to the San Francisco Estuary, California, USA, Plankton Biology and Ecology, 46(2), 128-131, 19990401
  4. Seasonal changes of zooplankton community in Honjyo area and its neighboring waters of Lake Naka-umi, Laguna, 6, 73-87, 19990401
  5. Feeding habits of zooplankton, in particular, copepods in Lake Naka-umi, Lagund, 6, 89-105, 19990401
  6. The identity of Limnoncaea diuncata Kokubo, 1914 (Copepoda : Poecilostomatoida) from Hokkaido, Japan, with the relegation of Diergasilus Do, 1981 to a junior synonym of Thersitina Norman, 1905, SYSTEMATIC PARASITOLOGY, 57(1), 35-44, 2004
  7. A new species of the deep-sea copepod genus Scutogerulus (Calanoida: Arietellidae) from the hyperbenthic waters of Okinawa, Japan, Systematics and Biodiversity, 2(1), 49-55, 20040801
  8. First record of the occurrence of an ellobiopsid Thalassomyces marsupii Kane on a new host of hyperiid amphipod in Japanese waters, Plankton Biology and Ecology, 51(2), 110-112, 20040801
  9. Prodajus curviabdominalis n. sp. (Isopoda: Epicaridea: Dajidae), an ectoparasite of mysids, with notes on morphological changes, behaviour and life-cycle, Systematic Parasitology, 60, 39-57, 20040601
  10. First record of an ectoparasitic dinoflagellate, Oodinium inlandicum (Dinophyta) infecting a chaetognath, Sagitta crassa from the Korean coasts, Algae, 19(3), 20040401
  11. Systematics and zoogeography of the deep-sea hyperbenthic family Arietellidae (Copepoda : Calanoida) collected from the Sulu Sea, JOURNAL OF NATURAL HISTORY, 39(27), 2483-2514, 2005
  12. Ectoparasitic isopod, Norileca indica (Crustacea, Isopoda, Cymothoidae), obtained from the stomach of Coryphaena hippurus (Perciformes, Coryphaenidae) in the Philippines, Biogeography, 7, 25-27, 20050820
  13. A new genus and species of nicothoid copepod (Crustacea : Copepoda : Siphonostomatoida) parasitic on the mysid Siriella okadai Ii from off Japan, SYSTEMATIC PARASITOLOGY, 62(1), 65-81, 2005
  14. A revision of the family Dissonidae Kurtz, 1924 (Copepoda : Siphonostomatoida), SYSTEMATIC PARASITOLOGY, 70(2), 81-106, 2008
  15. New record of a euphausiid ectoparasitic isopod, Heterophryxus appendiculatus G. O. Sars, 1885 (Crustacea: Dajidae) from Japan, PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON, 121(3), 326-330, 20081007
  16. Infection with the parasitic copepod Clavella parva (Lernaeopodidae) in gold-eye rockfish Sebastes thompsoni broodstock in Japan (with T. Umino, D. Uyeno, S. Ohtsuka, and H. Koizumi), Fish Pathology, 43(1), 55-60, 20080301
  17. Records of Caligus (Crustacea: Copepoda: Caligidae) from marine fish cultured in floating cages in Malaysia with a redescription of the male of Caligus longipedis Bassett-Smith, 1898, ZOOLOGICAL STUDIES, 48(6), 797-807, 20091101
  18. Complete life cycle of a pennellid Peniculus minuticaudae Shiino, 1956 (Copepoda: Siphonostomatoida) infecting cultured threadsail filefish, Stephanolepis cirrhifer, PARASITE, 20, 20131029
  19. Associations of fish juveniles with rhizostome jellyfishes in the Philippines, with taxonomic remarks on a commercially harvested species in Carigara Bay, Leyte Island, Plankton & Benthos Research, 9(1), 51-56, 201402
  20. Development of the swimming acorn worm Glandiceps hacksi: similarity to holothuroids, EVOLUTION & DEVELOPMENT, 16(3), 149-154, 201405
  21. Evolution of copepods-pattern and process, Aguabiology, 21(6), 463-470, 19990401
  22. A new species of Ridgewayia (Copepoda: Calanoida) from a submarine cave in Palau, western Pacific, Crustacean Research, 29, 1-11, 20000401
  23. Three new species of the demersal calanoid copepod Pseudocyclops from Phuket, Thailand, Species Diversity, 5, 201-213, 20000401
  24. Introduction of the Asian copepods Acartiella sinensis, Tortanus dextrilobatus (Copepoda: Calanoida), and Limnoithona teraspina (Copepoda: Cyclopoida) to the San Francisco estuary, California, USA, 1-16, 20000401
  25. Taxonomy, functional morphology, and behavioral ecology of the planktonic calanoid copepod Tortanus (Atortus), Journal of Natural Histroy, 34, 1967-1976, 20000401
  26. Second record of Cyclopina Kiraensis, a small brackish-water cyclopoid copepod, in Japan, Limnology, 2, 49-50, 20010401
  27. Phylogenetic relationships between arietellid genera (Copepoda : Calanoida), with establishment of three new genera, Bulletin of the Natural History Museum, 60(2), 105-172, 19940401
  28. Pseudocyclops lakshmi, a new species (Pseudocyclpoidae: calanoida: Copepoda) from the Lccadives, India, Proceedings of Biological Society of Washington, 107, 151-163, 19940401
  29. New species of Synagoga (Crustacea: Ascothoracida) from plankton off Okinawa, Japan, with a SEM study of the carapace, Publications of the Seto Marine Biological Laboratory, 36, 293-311, 19950401
  30. SEM observation of the nauplius of Monstrilla hamatapex, new species, from Japan and an example of upgraded descriptive standards for monstrilloid copepods, Journal of Crustacean Biology, 15, 703-719, 19950401
  31. Monodisc strobilation in Japanese giant box jellyfish Morbakka virulenta (Kishinouye, 1910): a strong implication of phylogenetic similarity between Cubozoa and Scyphozoa, EVOLUTION & DEVELOPMENT, 17(4), 231-239, 2015
  32. A taxonomic study on the genus Anilocra (Isopoda : Cymothoidae) parasitic on fish collected from Japan, ZOOLOGICAL SCIENCE, 22(12), 1434-1434, 2005
  33. Accumulation of tetrodotoxin (TTX) in Pseudocaligus fugu, a parasitic copepod from panther puffer Takifugu pardalis, but without vertical transmission - Using an immunoenzymatic technique, TOXICON, 48(1), 116-122, 2006
  34. A new family of poecilostomatoid copepods (Umazuracolidae) based on specimens parasitic on the black scraper (Thamnaconus modestus) in Japan, ZOOLOGICAL SCIENCE, 23(5), 483-496, 2006
  35. Larvaceans and their houses as important food for some pelagic copepods, Bulletin of Plankton Society of Japan, 535-551, 19910401
  36. Relationship between mouthpart structures and in situ feeding habits of species of the family Pontellidae, Marine Biology, 111, 19910401
  37. A new family of calanoid copepods, the Hyperbionycidae, collected from the deep-sea hyperbenthic community in the northeastern Atlantic), Sarsia, 78, 69-82, 19930401
  38. A new tantulocaridan (Crustacea: Maxillopoda) parasitic on calanoid, harpacticoid and cyclopoid copepods, Publications of Seto Marine Biological Laboratory, 36, 197-209, 19940401
  39. Tortanus derjugini Smirnov (Copepoda: Calanoida) from the Ariake Se, western Japan, with notes on the zoogeography of brackish-water calanoid copepods in East Asia, Bulletion of Plankton Society of Japan, 42, 147-162, 19950401
  40. Relationships between mouthpart structures and in situ feeding habits of five neritic calanoid copepods in teh Chukchi and norther Bering Seas in October 1988, Proceedings of the NIPR Symposium on Polar Biology, 9, 153-168, 19960401
  41. Specialized feeding mechanism in the pelagic copepod genus Heterorhabdus (Calanoida: Heterorhabdidae), with special reference to the mandibular tooth and labral glands, Marine Biology, 126, 619-632, 19960401
  42. Three new species of the demersal calanoid copepod Placocalanus (Ridgewayiidae) from Okinawa, southern Japan, Sarsia, 81, 247-263, 19960401
  43. In situ feeding habits of Oncaea (Copepoda: Poecilostomatoida) from the upper 250 m of the central Red Sea, with special reference to consumption of appendicularian houses, Bulletion of Plankton Society of Japan, 43, 89-105, 19960401
  44. Cyclopoid copepods from a stream in the limestone cave Akiyoshido, Japanese Journal of Limnology, 57, 305-312, 19960401
  45. Ultrastructure of the mouthpart sensory setae in mesopelagic copepods of the family Scolecitrichidae, Plankton Biology and Ecology, 44, 81-90, 19970401
  46. Evolutionary switching from suspension feeding to carnivory in the calanoid family Heterorhabdidae(Copepoda), Journal of Crustacean Biology, 17(4), 577-595, 19970401
  47. Two new genera of Tantulocarida(Crustacea)infesting asellote isopods and siphonostomatid copepods from western Japan, Journal of Natural History, 32, 683-699, 19980401
  48. Description and female genital structures of a new species of the demersal calanoid copepod Ridgewayia from southern Japan, Natural Histroy Research, 5, 17-29, 19980401
  49. Xanthocalanus gracilis and Tharybis magna (Copepoda: Calanoida) rediscovered from the Antarctic Ocean with baited traps, Journal of Natural Histroy, 32, 683-699, 19980401
  50. Gaussia princeps (Scott) (Copepoda, Calanoida, Metridinidae) from the Indo-Pacific, with notes on teh zoogeography of the genus, Species Diversity, 3, 169-186, 19980401
  51. Platycopia compacta n. sp. , the second species of Platycopioida(Crustacea : Copepoda)in the Indo-Pacific region, with remarks on development, feeding, swimming, and zoogeography, Zoological Science, 15, 415-424, 19980401
  52. Evolutionary swithcing from suspension-feeding to carnivory in the calanoid family Heterorhabdidae (Copepoda), Journal of Natural Histroy, 32, 785-804, 19980401
  53. Ultrastructure of the moutpart sensory setae in mesopelagic copepods of the family Scolecitrichidae, Journal of Natural Histroy, 32, 1303-1318, 19980401
  54. Redescription and taxonomic status of Sinodiaptomus valkanovi, a common limnoplanktonic calanoid copepod in Japan, with comparison to the closely related S. sarsi, Hydrobiologia, 379, 159-168, 19980401
  55. Phylogeny and zoogeography of the planktonic copepod genusTortanus (Calanoida : Tortanidae), with establishment of a new subgenus and descriptions of two new species, Journal of Crustacean Biology, 18(4), 774-807, 19980401
  56. The phylogeny, zoogeography, and ecology of marine cavernicolous crustaceans, Taxa, 3-13, 19990401
  57. Phylogenetic relationships of the family Metridinidae(Copepoda : Calanoida), Journal of Fisheries Science and Technology, 2(2), 122-128, 19990401
  58. Redescription of Haloptilvs caribbeanensis(Copepoda : Calanoida) from the Pacific, with remarks on the morphology of antennules in the genus Haloptilus, Journal of Fisheries Science and Technology, 2(2), 129-134, 19990401
  59. A new deep-water calanoid copepod and the phylogeny of the genus Nullosetigera nom. nov. in the Nullosetigeridae nom. nov. (pro Phyllopus: Phyllopodidae) from Japanese waters, Plankton Biology and Ecology, 46, 128-131, 19990401
  60. Redescription of two diosaccid harpacticoid copepods from the northern Mariana Islands, 2, 129-134, 19990401
  61. Playtcopia compactan.sp., the second species of Platycopioida (Crustacea: Copepoda) in the Indo-Pacific region, with remarks on development, feeding, swimmimg, and zoogeography, Zoological Science, 6, 3-13, 19990401
  62. Redescription of Haloptilus caribbeanensis (Copepoda: Calanoida) from the Pacific, with remarks on the morphology of antennules in the genus Haloptilus, 2, 122-128, 19990401
  63. Two new genera of Tantulocarida (Crustacea) infesting asellote isopods and siphonostomatoid copepods from western Japan, Journal of Natural Histroy, 33, 1581-1602, 19990401
  64. Phylogeny and zoogeography of the planktonic copepod genus Tortanus (Calanoida: Tortanidae), with establishment of a new subgenus and descriptions of two new species, Journal of Crustacean Biology, 18, 774-807, 19990401
  65. Phylogenetic relationships of the family Metridinidae (Copepoda: Calanoida), Plankton Biology and Ecology, 46, 132-147, 19990401
  66. Abundance and in-situ feeding habits of Neocalanus cristatus(Copepoda : Calanoida)in the Central and Western North Pacific Ocean, Bulletin of the National Research Institute of Far Seas Fisheries, 37-52, 20010401
  67. New species of Tortanus(Copepoda ; Calanoida)from stomach contents of chum salmon juveniles collected from the Sea of Japan, Plankton Biology and Ecology, 48(1), 59-67, 20010401
  68. Two new families of copepods(Copepoda : Siphonostomatoida)parasitic on echinoderms, Journal of Crustacean Biology, 21(1), 96-105, 20010401
  69. Oodinium inlandicum sp. nov. (Blastodiniales, Dinophyta), a new ectoparasitic dinoflagellates infesting a chaetoganth Sagitta crassa, Hydrobiologia, 453/454, 441-466, 20010401
  70. The first record of two demersal calanoid copepods, Pseudodiaptomus poplesia and P. nihonkaiensis in Korea, with remarks on morphology of the genital area, Plankton Biology and Ecology, 48, 85-95, 20010401
  71. Two new families of copepods (Copepoda: Siphonostomatoida) parasitic on echinoderms, Hydrobiologia, 448, 203-215, 20010401
  72. New species of Tortanus (Copepoda; Calanoida) stomach contents of chum salmon juveniles collected from the Sea of Japan, Journal of Crustacean Biology, 21, 96-105, 20010401
  73. Second record of Cyclopina kiraensis, a small brackish-water cyclopoid copepod, in Japan, Plankton Biology and Ecology, 48, 59-67, 20010401
  74. A new genus and species of the family Mantridae (Copepoda: Cyclopoda) infesting the bivalve Pseudochama retroversa from the Seto Inland Sea, western Japan, Limnology, 2, 49-50, 20010401
  75. Ingolfiella inermis n. sp., a new intersitial ingolfellid amphipod from Okinawa, southern Japan, Crustaceana, 79(9), 1097-1105, 20061231
  76. Accumulation of tetrodotoxin (TTX) in Pseudocaligus fugu, a parasitic copepod from panther puffer Takifugu pardalis, but without vertical transmission-using an immunoenzymatic technique, Toxicon, 48, 116-122, 20060419
  77. Sexual dimorphism in calanoid copepods: morphology and function, Hydrobiologia, 453/454, 441-466, 20010501
  78. Two new families of copepods (Copepoda : Siphonostomatoida) parasitic on echinoderms, JOURNAL OF CRUSTACEAN BIOLOGY, 21(1), 96-105, 2001
  79. The first record of two demersal calanoid copepods, Pseudodiaptomus poplesia and P-nihonkaiensis in Korea, with remarks on morphology of the genital area, HYDROBIOLOGIA, 448, 203-215, 2001
  80. Taxonomic studies on brackish copepods in Korean waters II. Ontogeny and phylogeny of appendages in copepodid stages of Tortanus derjugini Smirnov, 1935 (Copepoda, Calanoida), JOURNAL OF PLANKTON RESEARCH, 23(10), 1157-1169, 2001
  81. Sexual dimorphism in calanoid copepods: morphology and function, HYDROBIOLOGIA, 453, 441-466, 2001
  82. Three new species of the genus Macandrewella (Copepoda : Calanoida : Scolecitrichidae) from the Pacific Ocean, with notes on distribution and feeding habits, JOURNAL OF NATURAL HISTORY, 36(5), 531-564, 2002
  83. Redescription of two new species of Pseudodiaptomus from Asia and Australia (Crustacea: Copepoda: Calanoida: Pseudodiaptomidae) with discussion of the female genital structure and zoogeography of Indo-West Pacific species, Proceedings of the Biologucal Society of Washington, 115(3), 650-669, 20020401
  84. Functional morphology and food habits of deep-sea copepods of the genus Cephalophanes (Calanoida : Phaennidae): perception of bioluminescence as a strategy for food detection, MARINE ECOLOGY PROGRESS SERIES, 227, 157-171, 2002
  85. A new species of Thetispelecaris (Crustacea : Peracarida) from submarine cave on Grand Cayman Island, ZOOLOGICAL SCIENCE, 19(5), 611-624, 2002
  86. Three new species of the genus Macandrewella (Copepoda: Calanoida: Scolecitrichidae) from the Pacific Ocean, with notes on distribution and feedinh habits, Journal of Natural History, 36, 531-564, 20020401
  87. Functional morphology and food habits of deep-sea copepods of the genus Cephalophanes (Calanoida: Phaennidae): perception of bioluminescence as a strategy for food detection, Marine Ecology Progress Series, 227, 157-171, 20020401
  88. A new species of Thetispelecaris (Crustacea: Peracarida) from submarine cave on Grand Cayman Island, Zoological Science, 19, 611-624, 20020401
  89. Redescription of two species of Pseudodiaptomus from Asia and Australia (Crustacea : Copepoda : Calanoida : Pseudodiaptomidae) with discussion of the female genital structure and zoogeography of Indo-West Pacific species, PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON, 115(3), 650-669, 20021014
  90. Decapod crustaceans collected from the southern part of the Sea of Japan in 2000-2001 using TRV Toyoshio-maru, Natural Histroy Research, 7(1), 19-73, 20020401
  91. A new species of Tortanus (Atortus) (Copepoda : Calanoida : Tortanidae) from Rodrigues Island, Mauritius, JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 83(2), 355-360, 2003
  92. A new species of Neoscolecithrix (Crustacea; Copepoda; Calanoida) from off Okinawa, southwestern Japan, with comments on the generic position in the superfamily Clausocalanoidea, Bulletin of National Science Museum= Tokyo= Series A, 29(2), 53-63, 20030401
  93. Tide-induced reworking of planktonic foraminifers on the outer shelf and slope off Miyako Island, southern Japan: preliminary results, Journal of Science= Hiroshima University= Series C, 11(2), 239-246, 20030401
  94. A new species of Tortanus (Atortus) (Copepoda: Calanoida: Tortanidae) from Rodriges Island, Mauriius, Journal of Marine Biological Association of United Kingdom, 83, 355-360, 20030401
  95. New record of Centropages brevifurcus (Crustacea: Copepoda: Calanoida) from the Gulf of Thailand and its full redescription, Species Diversity, 8, 67-78, 20030401
  96. Mating plug in the planktonic copepod Tortanus (Atortus) rubidus, Plankton Biology and Ecology, 50(1), 25-26, 20030401
  97. Occurrence of intersex individuals in the sergestid shrimp, Acetes sibogae, in Darwin Harbour, Northern Territory, Australia, CRUSTACEANA, 76, 749-754, 2003
  98. Intersex in the mysid Siriella japonica izuensis Ii: the possibility it is caused by infestation with parasites, Plankton Biology and Ecology, 50(2), 65-70, 20030801
  99. Occurrence of intersex individuals in the sergestid shrimp, Acetes sibogae, in Darwin harbour, Norhtern Territory, Australia, Crustaceana, 76(6), 749-754, 20030401
  100. Morphology and host-specificity of the apostome ciliate Vampyrophrya pelagica infecting pelagic copepods in the Seto Inland Sea, Japan, MARINE ECOLOGY PROGRESS SERIES, 282, 129-142, 2004
  101. Morphology and host-specificity of the apostome ciliate Vampyrophrya pelagica infecting pelagic copepods in the Seto Inland Sea, Japan, Marine Ecology Progress Series, 282, 129-142, 20040401
  102. The identity of Limnoncaea diuncata Kokubo, 1914 (Copepoda: Poecilostomatoida) from Hokkaido, Japan, with the relegation of Diergasilus Do, 1981 to a junior synonym of Thersitian Norman, 1905, Systematic Parasitology, 57, 35-44, 20040401
  103. Redescription and taxonomic remarks of the licomolgid copepod Paraphiloconcha meretricis (Crustacea: Copepoda: Poecilostomatoida) parasitic on the bivalve Meretrix lamarckii from Japan, Species Diversity, 9, 331-341, 20040401
  104. Morphology and host-specificity of the apostome ciliate Vampyrophrya pelagica infecting pelagic copepods in the Seto Inland Sea, Japan, Marine Ecology Progress Series, 282, 129-142, 20041116
  105. Review of parasites of marine zooplankton, Bulletin of Plankton Socicty of Japan, 47(1), 1-16, 20000401
  106. Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964, ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 143(1), 133-159, 2005
  107. Systematics and zoogeography of the deep^sea hyperbenthic family Arietellidae (Copepoda: Calanoida) collected from the Sulu Sea, Journal of Natural History, 39(27), 2483-2514, 20050630
  108. A new genus and species of nicothoid copepod (Crustacea: Copepoda: Siphonostomatoida) parasitic on the mysid Siriella oakdai Ii from off Japan, Systematic Parasitology, 62, 65-81, 20050501
  109. A new species of the calanoid copepod genus Centropages (Crustaea) collected from Shimizu Port, Middle Japan: introduced or not?, Plankton Biology and Ecology, 52(2), 92-99, 20050801
  110. A new species of Tortanus (Atortus) (Copepoda: Calanoida: Tortanidae) from the Seychelles, Mauritius and Madagascar, Journal of the Marine Biological Association of UK, 85, 65-70, 20050301
  111. Prodajus curviabdominalis n. sp (Isopoda : Epicaridea : Dajidae), an ectoparasite of mysids, with notes on morphological changes, behaviour and life-cycle, SYSTEMATIC PARASITOLOGY, 60(1), 39-57, 2005
  112. A new species of Tortanus (Atortus) (Copepoda : Calanoida : Tortanidae) from the Seychelles, Mauritius and Madagascar, JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 85(1), 65-70, 2005
  113. Description of two new species of Neotachidius Shen & Tai, 1963 (Copepoda, Harpacticoida, Tachidiidae) from Korean brackish waters and proposal of a new genus for Tachidius (Tachidius) vicinospinalis Shen & Tai, 1964, Zoological Journal of the Linnean Society, 143, 133-159, 20050801
  114. Three new species of deep-sea hyperbenthic aetideid copepods (Crustacea) collected from Nansei Islands, southwestern Japan, National Science Museum Monograph, 29, 225-247, 20050401
  115. A new species of Pseudodiaptomus (Crustacea : Copepoda : Calanoida) from the Philippines, with a key to pseudodiaptomids from the Philippines and comments on the status of the genus Schmackeria, PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON, 119(2), 202-221, 20060711
  116. A new family of poecilostomatoid copepods (Umazuracolidae) based on specimens parasitic on the black scraper (Thamnaconus modestus) in Japan, Zoological Science, 23, 483-496, 20060531
  117. A new species of Pseudodiaptomus (Crustacea: Copepoda: Calanoida) from the Philippines, with a key to pseudodiaptomidsfrom the Philippines and comments on the status of the genus Schmackeria, Proceedings of the Biological Society of Washington, 119(2), 202-221, 20060611
  118. Accumulation of tetrodotoxin (TTX) in Pseudocaligus fugu, a parasitic copepod from panther puffer Takifugu pardalis, but without vertical transmission - Using an immunoenzymatic technique, TOXICON, 48(1), 116-122, 2006
  119. A new family of poecilostomatoid copepods (Umazuracolidae) based on specimens parasitic on the black scraper (Thamnaconus modestus) in Japan, ZOOLOGICAL SCIENCE, 23(5), 483-496, 2006
  120. Ingolfiella inermis n. sp., a new interstitial ingolfiellid amphipod from Okinawa, southern Japan (Peracarida, Amphipoda), CRUSTACEANA, 79, 1097-1105, 2006
  121. Detection of tetrodotoxin (TTX) from two copepods infecting the grass puffer Takifugu niphobles: TTX attracting the parasites?, Toxicon, 48, 620-626, 20060620
  122. Species of the parasitic genus Duboscquella are members of the enigmatic Marine Alveolate Group I, Protist, 158, 337-347, 20070613
  123. Isolation and characterization of bacteria from the copepod Pseudocaligus fugu ectoparasitic on the panther puffer Takifugu pardalis wth the emphasis on TTX, Toxicon, 50, 779-790, 20070705
  124. Symbionts of plankters: their diversity and importance, Journal of Scientific Research Chulalongkorn University, 2550, 29-42, 20071201
  125. Vertical distribution and feeding ecology of a copepod Gaetanus variabilis in the southern Japan Sea during winter, La mer, 45, 47-58, 20071001
  126. Prevalence and intensity of Phrixocephalus umbellatus (Copepoda: Siphonostomatoida: Pennellidae) parasitic on Paralichthys olivaceus in the western part of the Sea of Japan, Fishries Science, 73, 214-216, 20071001
  127. Species of the parasitic genus Duboscquella are members of the enigmatic Marine Alveolate Group I, PROTIST, 158(3), 337-347, 2007
  128. Temporal partitioning: dynamics of alternating occupancy of a host microhabitat by two different crustacean parasites, Marine Ecology Progress Series, IN PRESS, 20071201
  129. Prevalence and intensity of Phrixocephalus umbellatus (Copepoda : Siphonostomatoida : Pennellidae) parasitic on Paralichthys olivaceus in the western part of the Sea of Japan, FISHERIES SCIENCE, 73(1), 214-216, 2007
  130. Prevalence, intensity and reproduction of copepods parasitic on temperate bass Lateolabyax japonicas collected from Ariake Sea, NIPPON SUISAN GAKKAISHI, 73(4), 693-702, 2007
  131. Isolation and characterization of bacteria from the copepod Pseudocaligus fugu ectoparasitic on the panther puffer Takifugu pardalis with the emphasis on TTX, TOXICON, 50(6), 779-790, 2007
  132. Temporal partitioning: dynamics of alternating occupancy of a host microhabitat by two different crustacean parasites, MARINE ECOLOGY PROGRESS SERIES, 348, 261-272, 2007
  133. A new species of Thysanote Kroyer, 1863 (Copepoda : Siphonostomatoida : Lernaeopodidae), a fish parasite from Thailand, ACTA ICHTHYOLOGICA ET PISCATORIA, 38(1), 29-35, 2008
  134. A new genus of monstrilloid copepods (Crustacea) with anteriorly pointing ovigerous spines and related adaptations for subthoracic brooding, ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 152(3), 459-506, 2008
  135. Redescription of a subterranean amphipod, Pseudocrangonyx shikokunis (Crustacea: Amphipoda: Pseudocrangonyctidae) from Japan, Species Diversity, 13, 275-286, 20080827
  136. A new species of Anuretes Heller, 1865 (Copepoda : Caligidae) from the yellowbanded sweetlips Plectorhinchus lineatus (Haemulidae) off New Caledonia, SYSTEMATIC PARASITOLOGY, 70(1), 35-40, 2008
  137. Homogeneity among Lactococcus garvieae isolates from striped jack, Pseudocaranx dentex (Bloch & Schneider), and its ectoparasites, JOURNAL OF FISH DISEASES, 32(10), 901-905, 2009
  138. Records of Caligus (Crustacea: Copepoda: Caligidae) from Marine Fish Cultured in Floating Cages in Malaysia with a Redescription of the Male of Caligus longipedis Bassett-Smith, 1898, ZOOLOGICAL STUDIES, 48(6), 797-807, 2009
  139. A New Genus of Endoparasitic Copepods (Cyclopoida: Enterognathidae), Forming a Gall in the Calyx of Deep-sea Crinoids, ZOOLOGICAL SCIENCE, 27(8), 689-696, 2010
  140. Cladistic analysis of the calanoid Copepoda, INVERTEBRATE SYSTEMATICS, 24(3), 291-321, 2010
  141. Yaku'amides A and B, Cytotoxic Linear Peptides Rich in Dehydroamino Acids from the Marine Sponge Ceratopsion sp., JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 132(50), 17692-17694, 20101222
  142. A New Species of Paramacrochiron (Copepoda: Cyclopoida: Macrochironidae) Associated with the Rhizostome Medusa Rhopilema hispidum Collected from the Gulf of Thailand, with a Phylogenetic Analysis of the Family Macrochironidae, ZOOLOGICAL SCIENCE, 29(2), 127-133, 2012
  143. Evolution of the bomolochiform superfamily complex (Copepoda: Cyclopoida): New insights from ssrDNA and morphology, and origin of umazuracolids from polychaete-infesting ancestors rejected, INTERNATIONAL JOURNAL FOR PARASITOLOGY, 42(1), 71-92, 2012
  144. Biology of the Swimming Acorn Worm Glandiceps hacksi from the Seto Inland Sea of Japan, ZOOLOGICAL SCIENCE, 29(5), 305-310, 2012
  145. A new species of Enterognathus (Copepoda, Cyclopoida, Enterognathidae) collected from the Seto Inland Sea, western Japan, ZOOKEYS, 1-8, 2012
  146. Isolation of Spirastrellolides A and B from a Marine Sponge Epipolasis sp and Their Cytotoxic Activities, JOURNAL OF NATURAL PRODUCTS, 75(6), 1192-1195, 2012
  147. The lunule of caligid copepods: an evolutionarily novel structure, EVOLUTION & DEVELOPMENT, 14(6), 465-475, 2012
  148. Seasonal Occurrence and Microhabitat of the Hyperparasitic Monogenean Udonella fugu on the Caligid Copepod Pseudocaligus fugu Infecting the Grass Puffer Takifugu niphobles in the Seto Inland Sea, Japan, OCEAN SCIENCE JOURNAL, 47(3), 181-187, 2012
  149. Redescription of Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960) (Copepoda: Chondracanthidae) parasitic on marine fishes from the Seto Inland Sea, Japan and the East China Sea off Japan and Korea, JOURNAL OF NATURAL HISTORY, 47, 553-562, 20130301
  150. The caligid life cycle: new evidence from Lepeophtheirus elegans reconciles the cycles of Caligus and Lepeophtheirus (Copepoda: Caligidae), PARASITE, 20, 20130507
  151. A new species of Pseudodiaptomus (Crustacea, Copepoda, Calanoida, Pseudodiaptomidae) from the Prasae River Estuary, Gulf of Thailand, ZOOKEYS, 39-54, 2013
  152. Reconstruction of Arietellid Copepod Phylogenetic Relationship, with Description of a New Species of Sarsarietellus (Copepoda, Calanoida, Arietellidae) from Korean Waters, ZOOLOGICAL SCIENCE, 30(11), 998-1004, 2013
  153. A new species of Labidocera (Copepoda, Calanoida, Pontellidae) collected from Okinawa, southwestern Japan, with establishment of five Indo-West Pacific species groups in the L. detruncata species complex, ZOOKEYS, 21-34, 20141016
  154. A new species of Gastrosaccus Norman, 1868 (Mysida, Mysidae, Gastrosaccinae) from a sandy shore of Indonesia, ZOOKEYS, 17-32, 20140901
  155. First Record of Association of Copepods with Highly Venomous Box Jellyfish Chironex, with Description of New Species of Paramacrochiron (Cyclopoida: Macrochironidae), ZOOLOGICAL SCIENCE, 32(2), 195-203, 201503
  156. A new species of the commercially harvested jellyfish Crambionella (Scyphozoa) from central Java, Indonesia with remarks on the fisheries, JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 95(3), 471-481, 201505
  157. Screening of candidate genes encoding proteins expressed in pectoral fins of fugu Takifugu rubripes, in relation to habitat site of parasitic copepod Caligus fugu, using suppression subtractive hybridization, FISH & SHELLFISH IMMUNOLOGY, 44(1), 356-364, 201505
  158. Prevalence and intensity of Phrixocephalus umbellatus (Copepoda : Siphonostomatoida : Pennellidae) parasitic on Paralichthys olivaceus in the western part of the Sea of Japan, FISHERIES SCIENCE, 73(1), 214-216, 2007
  159. Temporal partitioning: dynamics of alternating occupancy of a host microhabitat by two different crustacean parasites, MARINE ECOLOGY PROGRESS SERIES, 348, 261-272, 2007
  160. CYPRIS Y FROM THE NORTH PACIFIC (CRUSTACEA : MAXILLOPODA), PUBLICATIONS OF THE SETO MARINE BIOLOGICAL LABORATORY, 29(1), 179-186, 19840331
  161. Records of Caligus (Crustacea: Copepoda: Caligidae) from Marine Fish Cultured in Floating Cages in Malaysia with a Redescription of the Male of Caligus longipedis Bassett-Smith, 1898, ZOOLOGICAL STUDIES, 48(6), 797-807, 2009
  162. Infection with the Parasitic Copepod Clavella parva (Lernaeopodidae) in Gold-eye Rockfish Sebastes thompsoni Broodstock in Japan, FISH PATHOLOGY, 43(1), 55-60, 2008
  163. Review of parasites of marine zooplankton, Bulletin of the Plankton Society of Japan, 47(1), 1-16, 20000225
  164. Cyclopoid Copepods from a Stream in the Limestone Cave Akiyoshido, Japanese journal of limnology, 57(4), 305-312, 19961228
  165. Reconsideration on Feeding Habits of Marine Pelagic Copepods (Crustacea), Umi no Kenkyu (Oceanography in Japan), 6(5), 299-320, 19971005
  166. Three new species of the demersal calanoid copepod Pseudocyclops from Phuket, Thailand, Plankton Biology and Ecology, 46(2), 132-147, 19990801
  167. Calanoid Copepods Collected from the Near-bottom in Tanabe Bay on the Pacific Coast of the Middle Honshu, Japan. III. Stephidae, PUBLICATIONS OF THE SETO MARINE BIOLOGICAL LABORATORY, 32(4), 219-232, 19871226
  168. Calanoid Copepods Collected from the Near-bottom in Tanabe Bay on the Pacific Coast of the Middle Honshu, Japan. II. Arietellidae (cont.), PUBLICATIONS OF THE SETO MARINE BIOLOGICAL LABORATORY, 30(4), 287-306, 19851225
  169. A Note on the Feeding Habit of a Calanoid Copepod, Pontellopsis yamadae Mori, PUBLICATIONS OF THE SETO MARINE BIOLOGICAL LABORATORY, 30(1), 145-149, 19850630
  170. A New Tantulocaridan (Crustacea : Maxillopoda) Parasitic on Calanoid, Harpacticoid and Cyclopoid Copepods, PUBLICATIONS OF THE SETO MARINE BIOLOGICAL LABORATORY, 36(4), 197-209, 19941115
  171. A New Asymmetrical Near-bottom Calanoid Copepod, Paramisophria platysoma, with Observations of Its Integumental Organs, Behavior and In-situ Feeding Habit, Bulletin of the Plankton Society of Japan, 36(2), p87-101, 199002
  172. In situ feeding habits of Oncaea (Copepoda: Poecilostomatoida) from the upper 250 m of the central Red Sea, with special reference to consumption of appendicularian houses, Bulletin of the Plankton Society of Japan, 43(2), 89-105, 19961225
  173. Seasonal changes in infection with trematode species utilizing jellyfish as hosts: evidence of transmission to definitive host fish via medusivory, PARASITE, 23, 20160407
  174. Molecular evidence on evolutionary switching from particle-feeding to sophisticated carnivory in the calanoid copepod family Heterorhabdidae: drastic and rapid changes in functions of homologues, JOURNAL OF NATURAL HISTORY, 50(27-28), 1759-1772, 20160324
  175. Cytotoxic liner acetylenes from a marine sponge Pleroma sp., Tetrahedron, 71, 9564-9579, 20151024
  176. Historical biogeography of the genus Ploycopissa (Ostracod: Myodocopa: Cladocopina), with the description and DNA barcode of the second Indo-Pacific species from the Seto Inland Sea, Marine Biodiversity, 20151118
  177. Supplementary description of three Acartiella species (Crustacea;: Copepoda: Calanoida) from estuarine waters in Thailand, Species Diversity, 20, 167-181, 20151125
  178. Molecular identification of "Gum Gum": a food mole crab Hippa adactyla from Papua New Guinea, Biosphere Science, 201512
  179. Historical biogeography of the genus Polycopissa (Ostracoda: Myodocopa: Cladocopina), with the description and DNA barcode of the second Indo-Pacific species from the Seto Inland Sea, MARINE BIODIVERSITY, 46(3), 625-640, 2016
  180. Yakushinamides, Polyoxygenated Fatty Acid Amides That Inhibit HDACs and SIRTs, from the Marine Sponge Theonella swinhoei, JOURNAL OF NATURAL PRODUCTS, 79(9), 2384-2390, 2016
  181. New records of Caligidae (Copepoda, Siphonostomatoida) from the Philippines, ZOOTAXA, 4174(1), 237-248, 20161011
  182. On the occurrence of caligids (Copepoda: Siphonostomatoida) in the marine plankton: a review and checklist, ZOOTAXA, 4174(1), 437-447, 20161011
  183. A New Species of Hyperbenthic Cyclopoid Copepod from Japan: First Record of the Genus Cyclopicina in the Indo-Pacific Region, ZOOLOGICAL SCIENCE, 33(6), 659-666, 201612
  184. SEVEN NEW SPECIES OF TORTANUS (ATORTUS) (COPEPODA, CALANOIDA, TORTANIDAE) FROM NORTH SULAWESI, INDONESIA, CRUSTACEANA, 90(1), 77-99, 201701
  185. Magnetic light cloaking control in the marine planktonic copepod Sapphirina, AIP ADVANCES, 7(5), 201703
  186. Modulation of light localization in the iridophores of the deep-sea highlight hatchetfish Sternoptyx pseudobscura under magnetic field, AIP ADVANCES, 7(5), 201701
  187. Possible westward extension of submerged Oyashio waters to off Tanegashima Island, Kyushu, western Japan: based on the occurrence of the subarctic copepod Neocalanus crostatas, Biosphere Science, 25-30, 201612
  188. Low genetic diversity in Ozobranchus janteseanus (Hirudinida: Ozobranchidae) in Japan: possibility of introduction with their host turtles, Parasitology International, 66, 798-801, 20170826
  189. Structure Revision of Poecillastrin C and the Absolute Configuration of the beta-Hydroxyaspartic Acid Residue, ORGANIC LETTERS, 19(19), 5395-5397, 20171006
  190. A new genus and species of the family Pennellidae (Copepoda, Siphonostomatoida) infecting the Pacific viperfish Chauliodus macouni, PARASITE, 25, 20180209
  191. Poecillastrin H, a Chondropsin-Type Macrolide with a Conjugated Pentaene Moiety, from a Characella sp Marine Sponge, JOURNAL OF NATURAL PRODUCTS, 81(5), 1295-1299, 201805
  192. Possible origins of planktonic copepods, Pseudodiaptomus marinus (Crustacea: Copepoda: Calanoida), introduced from East Asia to the San Francisco Estuary based on a molecular analysis, AQUATIC INVASIONS, 13(2), 221-230, 201806
  193. Piscivory of the Japanese giant box jellyfish Morbakka virulenta, PLANKTON & BENTHOS RESEARCH, 13(2), 66-74, 201805
  194. New records of six deep-sea caridean shrimps (Crustacea: Decapoda) from the Ryukyu Islands and its adjacent waters, southwestern Japan, ZOOTAXA, 4457(1), 114-128, 20180807
  195. Density of juveniles of trials-spine horseshoe crab Tachypleus tridentatus in Sone Estuary, Kitakyushu, Japan, with notes on sediments particle sizes in habitats and breeding areas, 15, 1-7, 20171020
  196. Possible mimicry in the galaemmatid bivalve Scintilla philippinensis (Bivalvia: Galaemmatidae) to nudibranchs and crabs, Venus, 75, 93-98, 20171127
  197. A new species of Peniculus (Copepoda: Siphonostomatoida) parasitizing mesopelagic myctophid fish: first discovery of colonization of the genus in deep water, PARASITE, 25, 20181126
  198. A new species of Acartia (Copepoda, Calanoida) from the Philippines, based on morphological and molecular analyses, ZOOKEYS, 71-94, 20190108
  199. Benthic platyctenid ctenophore, Vallicula multiformis Rankin, 1956, found in an aquarium on Palawan Island, the Philippines, PLANKTON & BENTHOS RESEARCH, 14(1), 14-21, 201902
  200. Toxicity and Toxin Composition of the Greater Blue-Ringed Octopus Hapalochlaena lunulata from Ishigaki Island, Okinawa Prefecture, Japan, TOXINS, 11(5), 201905
  201. Diel patterns of Zooplankton community structure in nearshore waters of different substrates off Tinggi and Sibu Islands, Malaysia, with special reference to Copepods, AQUATIC ECOSYSTEM HEALTH & MANAGEMENT, 22(1), 86-102, 20190102
  202. Density of juveniles of trials-spined horseshoe crab Trachypleus tridentatus and characteristics of sediments in the Sone Estuary, Fukuoka, Japan, 16, 6-12, 201810
  203. Biological notes on Tachypleus tridentatus (Leach, 1819) in Hiroshima Prefecture, Japan: two species of epizootic organisms found on adults, and the carcass of a juvenile presumably eaten by a bird, 16, 1-5, 201810
  204. Epibionts on parasitic copepods infesting fish: unique substrates, Taxa, 201810
  205. Planktonic phases in symbiotic copepods: a review, Bulletin of Southern California Academy of Sciences, 117(2), 104-119, 201806
  206. Some observations of morphology and behavior of a hyperbenthic misophrioid copepod, Bulletin of Southern California Academy of Sciences, 117(2), 127-137, 201806

Publications such as books

  1. 1999, Xth JSPS/VCC joint seminar on marine and fisheries sciences, Malacca, Malaysia (Taxonomy and feeding ecology of demersal calanoid copepods collected from Thailand, JSPS/VCC, 1999
  2. 2015/10/08, Marine Protists Diversity and Dynamics, marine protists, Springer, 2015, 10, E, Ohtsuka S, Suzaki T, Horiguchi T, Suzuki N, Not F (eds), 978-4-431-55129-4, 648
  3. 2016, Diversity and Commonality in Animals Species Diversity of Animals in Japan, Recent advances in our understanding of the biodiversity of copepods in Japanese waters are briefly reviewed. It is noteworthy that the two new species of Platycopioida found in Japan are the first record of this order from the Indo-Pacific. Taxonomic revisions of calanoids in Japanese waters have continued based on both morphological and molecular data. Molecular analyses have revealed the presence of cryptic/sibling species in a common species and of intraspecific variations. Complete mitochondrial DNA sequences from copepods have been analyzed for Tigriopus japonicus, which suggest that copepods are genetically ‘eccentric.’ Molecular tools have helped to clarify the phylogenetic relationships of highly modified symbiotic copepods. Population dynamics, life cycles, and distributions of planktonic copepods have been thoroughly investigated in coastal and oceanic waters. These studies highlighted the influence of the Oyashio/Kuroshio currents on the coast, the high mortality of eggs from predation, adaptive responses to phytoplankton blooms, and niche partitioning by habitat and food. Deep-sea calanoids are highly diverse and specialized for detritivory and carnivory. East Asian planktonic copepods have been introduced to America and Europe via ballast water, although Japan not yet received any alien planktonic copepods. In contrast, parasitic copepods have been introduced to Japan via aquaculture. The life cycle of commercially important sea lice was clarified. Because copepods are one of the most abundant metazoans on Earth, more biological but also biomimetic information should be accumulated., Copepod Biodiversity in Japan: Recent advances in Japanese Copepodology, Alien • Copepod • Indo-West Pacific • Partition • Relict •Zoogeography, Springer, 2016, December, E, Susumu Otsuka, Shuhei Nishida, 721

Invited Lecture, Oral Presentation, Poster Presentation

  1. Associations of fish juveniles and benthic invertebrates with large-sized jellyfish in Asian waters: key issues in pelagic realms, Susumu Ohtsuka, Yusuke Kondo, Shoma Okada, Jun Nishikawa, Khwanruan Srinui, Ephrime Metillo, Fatimah Md. Yusoff, Nanako O. Ogawa, Naohiko Ohkouchi, Shuhei Nishida, Jun Nishikawa, Khwanruan Srinui, Ephrime Metillo, Fatimah Md. Yusoff, Nanako O. Ogawa, Naohiko Ohkouchi, Shuhei Nishida, 9th International Scientific Symposium (IOC/WESTPAC), 2014/04/22, Without Invitation, IOC/WESTPAC, Nha Trang, Vietnam, Large-sized jellyfish harbor a wide variety of fish and invertebrates as hosts. However their actual interactions are rarely addressed, because of difficulties in assessment of trophic relationships between them and of little information on roles of the host throughout the life cycle of symbionts. We have been intensively investigating these interactions in Asian waters with modern techniques such as stable isotope analyses. In East Asian waters, scyphozoans such as Aurelia aurita s.l., Chrysaora pacifica, Cyanea nozakii and Sanderia malayensis are frequently associated with butterfish juveniles during warm seasons. Essentially the fish utilize jellyfish for commensalism or antipredation, however, the ontogenetic changes in symbiosis are suggested based on the stable isotopic analysis. The fish tends to feed on the host tissues, as it grows. The shrimp Latreutes mucronatus is highly specific to the Netrostoma setouchiana. The highly venomous box jellyfish Morbakak virulenta also shows complex interactions with fish. In southeastern Asian waters two commercially harvested rhizostomes, Rhopilema hispidum and Lobonemoides robustus, play an important role as host for fish juveniles (shrimp scad Alepes djedaba) and invertebrates (cross crab Charybdis feriata and hippolytid shrimp La. anoplonyx). These interactions seem to change with the growth of these symbionts as observed in butterfish in East Asia. In case of sympatric occurrence of these two hosts, shrimp scad juveniles exhibit habitat segregation: larger individuals prefer R. hispidum to Lo. robutus. An association between the ophiuroid Ophiocnemis marmorata and these rhizostomes is broadly observed in tropical Asian waters, corresponding to commensalism. Our results strongly imply that larvae of these benthic animals most likely settle directly on the jellyfish host and then temporarily stay there until the death o f the host. On the other hand fisheries of these edible jellyfish seem to have a great negative impact on the recruitment of these symbionts.
  2. Systematics, morphology and feeding of calanoid copepods, Susumu Ohtsuka, 12th International Conference on Copepoda, Preconference Workshop, 2014/07/08, Without Invitation, World Association of Copepodologists, Yosu, Korea, The systematics, morphology and feeding of calanoid copepods are explained in detail, using powerpoint.
  3. Undescribed species of the commercially harvested jellyfish Crambionella (Scyphozoa) from central Java, Indonesia with remarks on the fisheries, Jun Nishikawa, Susumu Ohtsuka, Mulyadi, Nova Mujiono, Dhugal J. Lindsay, Hiroomi Miyamoto, Shuhei Nishida, Jun Nishikawa, Mulyadi, Nova Mujiono, Dhugal J. Lindsay, Hiroomi Miyamoto, Shuhei Nishida, 9th International Scientific Symposium (IOC/WESTPAC), 2014/04/22, Without Invitation, IOC/WESTPAC, An undescribed species of Crambionella is discovered from central Java, Indonesia. The number of lappets per octant (14), presence of foliaceous appendages on oral-arms, absence of tubercles on the velar lappets, and the body colour distinguish this species from three previously-described congeners. In addition, the analysis of partial sequences of the cytochorome c oxides subunit I gene indicated substantial genetic differences from both C. orsini and C. stuhlmani, supporting the validity of this new species. A combination of morphological and genetic approaches determined that the remarkable differences in exumbrellar colors observed in specimens is simply intra-specific variation. Surprisingly, this species has been commercially harvested for more than 20 years and is well-known to the local people in the region, yet it had remained unknown to science until this point. The commercial fisheries targeting this formerly unknown species are also presented in detail.
  4. Seuxal dimorphism in calanoid copepods-morphology and function, Susumu Otsuka, The World Association of Copepodologists, 1999, With Invitation
  5. Functional morphology of calanoids copepods; Evolution of planktonic copepods, Susumu Otsuka, 2003/07, With Invitation
  6. Morphology and Systematics of planktonic copepods, Susumu Otsuka, Eighth International Conference on Copepoda (Preconference Workshop), 2002/07, With Invitation
  7. Evolutionary shift from particle-feeding to carnivory in ccalanoid copepods: morphological and molecular evidences, Takeshi Hirabayashi, Makoto Urata, Ko Tomikawa, Susumu Ohtsuka, 12th International Conference on Copepoda, 2014/07/14, Without Invitation, World Association of Copepodologists, Seoul, Korea, In calanoid copepods exclusive carnivory is found in some lineages. In oceanic waters a wide variety of families or genera are supposed to be carnivores, whereas in coastal waters restricted members such as Euchaetidae, Pontellidae and Tortanidae are truly carnivorous. In the oceanic family Heterorhabdidae both particle-feeding and carnivorous genera are involved with some intermediate taxa, and the evolutionary shift from particle-feeding to carnivory has already been supported by the morphology-based phylogenetic analyses. The evolution in feeding of this family could have occurred without any addition of novel structure. Our new molecular analysis using nuclear ribosomal DNAs (18S, 28S) strongly enhances the results: the carnivorous Heterorhabdus-Paraheterorhabdus and Neorhabudus-Hemirhabuds clades are a final divergence, while the particle-feeding genus Disseta is basal with offshooting of the intermediate genera between these extremes. In calanoids two basic modes of carnivory are distinguished: chopsticks and scooping. The carnivorous genera of Heterorhabdidae, Candaciidae, Chiridiella and Corunucalanus are supposed to exclusively adopt chopsticks mode, whereas others essentially employ both feeding modes, depending on prey size. The former is characterized by only a few of highly chitinized elements on the maxillae only or maxillae/maxillipeds, while the latter is defined by the formation of feeding basket with the feeding appendages. The morphological and molecular phylogenetic analyses on the Heterorhabdidae propose that chopsticks mode could have divided directly from particle-feeding to carnivory not via scooping mode. We exactly traced the homology of maxillary and maxillipedal segments/elements specific to carnivory, and recognized 11 morphological types in carnivorous calanoids, suggesting that carnivory could have independently evolved many times through the evolution of calanoids.
  8. Complete life cycle of a pennellid Peniculus minuticaudae Shiino (Copepoda: Siphonostomatoida) infecting cultured threadsail filefish, Ismail Norshida, Susumu Ohtsuka, Balu Alagar Venmathi Maran, Satoshi Tasumi, Kassim Zaleha, Hirofumi Yamashita, Balu Alagar Venmathi Maran, Satoshi Tasumi, Kassim Zaleha, Hirofumi Yamashita, 12th International Conference on Copepoda, 2014/07/14, Without Invitation, World Association of Copepodologists, Seoul, Korea, Peniculus minuticaudae Shiino is a parasitic copepod infecting the fins of fishes mainly belonging to the family Monachantidae. Recently it seems to have been spreading in fish farms in western Japan and southern Korea. Our study showed the infection occurs all year round with the highest intensity recorded during summer. Based on our finding of all post-embryonic stages together with the post-metamorphic adult females on the fins of threadsail filefish Stephanolepis cirrhifer Temminck and Schlegel cultured in a fish farm at Ehime Prefecture, Japan, we newly proposed the complete life cycle the P minuticaudae. The hatching stage was observed as an infective copepodid. It metamorphosed into chalimi I to IV after infection on fins. Sex can be differentiated from chalimus I. Adult males were observed frequently in precopulation amplexus with various stages of chalimi, however, copulation occurs only between adults. Fertilized pre-metamorphic adult females carrying paired spermatophores may detach from the host, and settle again on the same host and site to undergo massive differential growth to become post-metamorphic. A comparison in of the life cycle of P. minuticaudae has been made with those of three known pennellids; Lernaeocera branchialis Linnaeus, Cardiodectes medusaeus Wilson and Lernaeenicus sprattae Sowerby. The life cycle of pennellids can be divided into four categories based on the number of hosts and the presence or absence of nauplii. Combinations are as follows: (1) L. branchialis (two hosts, nauplii present); (2) C. medusaeus (two hosts, no nauplii); (3) L. sprattae (single host, nauplii present); (4) P. minuticaudae (single host, no nauplii). In L. sprattae, adult females change infection sites from fins and body surface to eyes of the host for oviposition, whereas in P. minuticaudae all stages including ovigerous females infect fins of the host. In the family blood-suckers may have two hosts, while histophagous taxa may not change host and/or attachment site.
  9. Taxonomy and fisheries of commercially harvested jellyfish Crambionella (Scyphozoa) from central Java, Indonesia, Nishikawa J, Ohtsuka S, Mulyadi, Mujiono N, Lindsay DJ, Minamoto H, Nishida S, Asian CORE-COMSEA seminar on coastal ecosystems in southeast Asia, 2016/02/24, Without Invitation, University of Tokyo, Kashiwa, Japan
  10. Planktonic phases of symbiotic copepods, Susumu Otsuka, 13th International Confernce on Copepoda, 2017/07/18, With Invitation, World Association of Copepodologists, California, USA
  11. Behavioral observations of an undescribed hyperbenthic misophrioid copepod, with supplementary data on DNA sequences, Susumu Otsuka, Hayato Tanaka, Yusuke Kondo, Katsushi Hirano, Dame Jaume, Geoffrey A. Boxshall, Dame Jaume, Geoffrey A. Boxshall, 13th International Conference on Copepoda, 2017/07/18, Without Invitation, World Association of Copepodologists, California, USA
  12. Functional morphology of the cephalothoracic sucker of Callous, Taiki Fuji, Susumu Otsuka, Yusuke Kondo, Tomonori Kaji, Satoshi Yasumi, Tomonori Kaji, Satoshi Yasumi, 13th International Conference on Copepoda, 2017/07/19, Without Invitation, World Association of Copepodologists, California, USA
  13. Ecological studies on Panaietis yamaguchi that infect the buccal cavity of horned turbo, Turbo cornets, Hayato Uchiumi, Yusuke Kondo, Susumu Otsuka, 2017/07/19, Without Invitation, World Association of Copepodologists, California, USA
  14. Trophic interactions between bacteria and Bradfordian families, Katsushi Hirano, Susumu Otsuka, Kentaro Takada, Hideo Fukushima, Kentaro Takada, Hideo Fukushima, 13th International Conference on Copepoda, 2017/07/20, Without Invitation, World Association of Copepodologists, California, USA
  15. Morphometric study on the feeding appendages of planktonic calanoid copepods: relationships with feeding modes, habitat depth ,and stable isotopes, Sota Komeda, Hiroaki Tamura, Yoshiyuki Abe, Maki Noguchi Aita, Fujio Hyodo, Susumu Otsuka, Russel R. Hopcroft, Atsugi Yamaguchi, Atsugi Yamaguchi, 13th International Conference on Copepoda, 2017/07/20, Without Invitation, World Association of Copepodologists, California, USA
  16. Symbiotic biology and fisheries of jellyfish in southeastern Asia, Susumu Otsuka, 2nd International symposium on marine and fisheries research, 2017/07/24, With Invitation, Universities Gadjah Mada, Youyakarta
  17. Morphometric study on feeding appendages of pelagic calanoid copepods: relationship with feeding mode, habitat depths and stable isotopes, S. Sota,H. Tamura,Y. Abe, M.N. Aita,F. Hyodo,S. Ohtsuka,R.R. Hopcroft,A. Yamaguchi, A. Yamaguchi, 33th International symposium on the Okhotsk Sea and Polar Oceans, 2018/02/21, Without Invitation
  18. Planktonic phases of symbiotic copepods, with a special reference to Caligidae, Susumu Ohtsuka, International Conference on Agriculture, Animal Sciences, and Food Technology, 2018/10/30, With Invitation, Universiti Sultan Zainal Abidin, Terengganu, Malaysia
  19. Population structure of the "hitch-hike" ophiuroid, Ophiocnemis marmorata, associated with jellyfish, Hiruta, SF, Y. Kondo, J Nishikawa, Fed Yusoff, EB Metillo, H Pagliawan, K Srinui, S Ohtsuka, T. Fujita, 16th International Echinoderm Conference, 2018/05/28, Without Invitation, Nagoya University, Nagoya City
  20. Impact of jellyfish fisheries on their symbionts, Susumu Ohtsuka, Lecture for students of Universiti Sultan Sainan Abidin, Malaysia, 2018/11/01, With Invitation, Universiti Sultan Sainan Abidin, Terengganu, Malaysia
  21. Symbionts of jellyfish occurred in Thailand, Ohtsuka S, Y. Kondo, International workshop on classification and culture of jellyfish in Thailand, 2018/09/02, With Invitation, Burapha University and Department of Marine and Coastal Resources, Thailand, Bangsean, Trat

Awards

  1. 1999年09月, Zoological Science Award, 日本動物学会, "学術論文「Platycopia compacta n.sp.,the second species of Platycopioida (Crustacea: Copepoda) in the Indo-Pacific region, wi

Social Activities

History as Committee Members

  1. Executive council members, 2018/04, 2019/03, Plankton Society of Japan

History as Peer Reviews of Academic Papers

  1. 2015, Species Diversity, Editor