Yoichi Sakai

Last Updated :2024/10/11

Affiliations, Positions
Graduate School of Integrated Sciences for Life, Professor
E-mail
sakai41hiroshima-u.ac.jp
Self-introduction
Behavioral ecology of fishes Underwater survey for behavioral study Mating system of fishes Sex change of fishes Reproductive strategy in fishes

Basic Information

Academic Degrees

  • Doctor (Science), Osaka City University
  • Master of Science, Osaka City University

Educational Activity

  • [Bachelor Degree Program] School of Applied Biological Science : Department of Applied Biological Science : Integrative Hydrospheric Science Program
  • [Master's Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Bioresource Science
  • [Doctoral Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Bioresource Science

In Charge of Primary Major Programs

  • Integrative Hydrospheric Science Program

Research Fields

  • Agricultural sciences;Applied aquatic science;Aquatic bioproduction science
  • Biology;Basic biology;Ecology / Environment

Research Keywords

  • Sex change
  • Reproductive strategies
  • Foraging ecology
  • Alternative tactics
  • Fish Biology
  • Mating systems
  • Behavioral Ecology of Reef Fishes

Affiliated Academic Societies

  • Japan Ethological Society, 1990
  • The Ichthyological Society of Japan, 1993
  • The Japanese Society of Fisheries Science, 2001

Educational Activity

Course in Charge

  1. 2024, Liberal Arts Education Program1, 1Term, Sport fishing and science: fishes-human beings interactions
  2. 2024, Undergraduate Education, Intensive, Laboratory Work in General Biology I
  3. 2024, Undergraduate Education, Intensive, Laboratory Work in General Biology II
  4. 2024, Undergraduate Education, 3Term, Research Front of Bioresource Science
  5. 2024, Undergraduate Education, 1Term, Statistics in Biology
  6. 2024, Undergraduate Education, Intensive, Laboratory Work in Hydrospheric BiologyII
  7. 2024, Undergraduate Education, Intensive, Control of the Fish and Shellfish Disease in Aquaculture
  8. 2024, Undergraduate Education, 1Term, Exercises in Integrative Hydrospheric ScienceI
  9. 2024, Undergraduate Education, Intensive, International Fishery
  10. 2024, Undergraduate Education, Intensive, Fisheries Socioeconomics
  11. 2024, Undergraduate Education, Intensive, Applied International Fishery
  12. 2024, Undergraduate Education, 3Term, Hydrospheric EcologyI
  13. 2024, Undergraduate Education, Second Semester, Graduation Thesis I
  14. 2024, Undergraduate Education, First Semester, Graduation Thesis II
  15. 2024, Undergraduate Education, Second Semester, Graduation Thesis III
  16. 2024, Undergraduate Education, Intensive, (AIMS) Fish Production
  17. 2024, Undergraduate Education, Intensive, Fish Production
  18. 2024, Graduate Education (Master's Program) , 1Term, Exercises in Bioresource Science A
  19. 2024, Graduate Education (Master's Program) , 2Term, Exercises in Bioresource Science A
  20. 2024, Graduate Education (Master's Program) , 3Term, Exercises in Bioresource ScienceB
  21. 2024, Graduate Education (Master's Program) , 4Term, Exercises in Bioresource ScienceB
  22. 2024, Graduate Education (Master's Program) , Academic Year, Research for Academic Degree Dissertation in Bioresource Science
  23. 2024, Graduate Education (Master's Program) , 1Term, Fish Biology and Fisheries I
  24. 2024, Graduate Education (Master's Program) , 3Term, Fish Biology and Fisheries II
  25. 2024, Graduate Education (Doctoral Program) , Academic Year, Research for Academic Degree Dissertation in Integrated Life Sciences

Research Activities

Academic Papers

  1. Presence of a bisexual gonad: implications for protogynous sex change in the white-edged lyretail Variola albimarginata (Serranidae), Journal of Ichthyology, 202408
  2. Histological notes on diandric protogyny in the freckled hawkfish Paracirrhites forsteri (Cirrhitidae) from Kuchierabu-jima Island, Japan, Ichthyological Research, 20240726
  3. Obituary: Tetsuo Kuwamura (1950–2024), Ichthyological Research, 20240531
  4. Records of 57 fish species, including two southernmost recorded species, from Kuchinoerabu-jima Island, Osumi Islands, Kagoshima, Japan, Ichthy, 45, 1-14, 20240601
  5. Temporary division of roles in group hunting for fish eggs by a coral reef fish, Journal of Ethology, 20240513
  6. Change in the subtidal reef fish assemblage at Kuchierabu-jima Island, southern Japan, between 1972 and 2005, Ichthyological Research, 2024
  7. ★, The potential for egg-guarding care in females of the damselfish, Dascyllus reticulatus, in the absence of uniparental male care, Journal of Fish Biology, 104(4), 979-988, 202312
  8. Cleaner fish coloration does not always reduce predation risk: testing the effect of protective mimicry in the false cleanerfish, Aspidonntus taeniatus., Biological Journal of the Linnean Society, 20, 1-10, 20231115
    Link to Paper Search Results by DOI
  9. Protogynous sexuality and gonad structures in the coral-dwelling goby Pleurosicya mossambica, Ichthyological Research, 20230420
    Link to Paper Search Results by DOI
  10. Bidirectional sex change and plasticity of gonadal phases in the goby Lubricogobius exiguus, Journal of Fish Biology, 102, 1079-1087, 20230309
    Link to Paper Search Results by DOI
  11. Comparison of mortality and feeding hebavior of the false cleanerfish Aspidontus taeniatus and the lance blenny A. dussumieri regarding the effects of mimicry, Journal of Ethology, 41, 73-77, 202301
    Link to Paper Search Results by DOI
  12. Male territory-visiting polygamy of the white-spotted boxfish Ostracion meleagris (Ostraciidae) involving daily spawning migration, Environmental Biology of Fishes, 105, 1165-1178, 20220920
    Link to Paper Search Results by DOI
  13. Protective resemblance to floating pumice stones by juveniles of the rough triggerfish Canthidermis maculata (Balistidae, Tetraodontiformes), Ichthyological Research, 20220628
  14. Cryptic bachelor sex change in haremic colonial groups of the coral-dwelling damselfish Dascyllus reticulatus, Journal of Ethology, 40(2), 181-192, 20220318
    Link to Paper Search Results by DOI
  15. Study on the development from embryo to adult stages in the Naru eagle ray, Aetobatus narutobiei, in the western Seto Inland Sea, Bulletin of the Hiroshima University Museum, 13, 49-65, 20211225
  16. Seasonal Changes in the Fish Fauna in the Coastal Area of Yashiro Island, Seto Inland Sea, Japan, Bulletin of the Hiroshima University Museum, 13, 9-19, 20211225
  17. Effects of group behavior in the predatory raid on damselfish nests by the false cleanerfish Aspidontus taeniatus, Ethology, 20211023
  18. Feeding habits of the white-spotted boxfish Ostracion meleagris reveal a strong preference for colonial ascidians, Ichthyological Research, 68(4), 461-470, 20210214
    Link to Paper Search Results by DOI
  19. Testing the effect of mimicry using a color variant of the false cleanerfish Aspidontus taeniatus found in Sesoko Island, Okinawa., Japanese Journal of Ichthyology, 67(2), 202011
  20. The false cleanerfish relies on aggressive mimicry to bite fish fins when benthic foods are scarce in their local habitat, SCIENTIFIC REPORTS, 10(1), 20200526
    Link to Paper Search Results by DOI
  21. Non-mimic color variant of the false cleanerfish Aspidontus taeniatus found in Okinawa, Japan, Galaxea, Journal of Coral Reef Studies, 22, 1-2, 20200512
  22. ★, Hermaphroditism in fishes: an annotated list of species, phylogeny, and mating system, ICHTHYOLOGICAL RESEARCH, 67(3), 341-360, 20200507
    Link to Paper Search Results by DOI
  23. Age and growth of the Naru eagle ray, Aetobatus narutobiei, off Sanyo-Onoda City, in the western Seto Inland Sea, Bulletin of the Hiroshima University Museum, 11, 15-24, 20191225
  24. Burrowing ecology of western sand lance, Ammodytes japonicus, in sandy bottom, Kaiyo Monthly, 51(12), 614-618, 20191201
  25. Dual social structures in harem-like colony groups of the coral-dwelling damselfish Dascyllus reticulatus depending on body size and sheltering coral structures, Journal of Ethology, DOI:10.1007/s10164-019-00584-8(37), 175-186, 201902
  26. The burrowing sand lance Ammodytes japonicus (Teleostei, Ammodytidae) prefers benthic sediments of low shear strength, Journal of Ethology, 37, 213-219, 2019
  27. Aggressive mimicry of the cleaner wrasse by Aspidontus taeniatus functions mainly for small blennies, Ethology, 124(6), 432-439, 20180419
  28. Redescription of the bump-head sunfish Mola alexandrini (Ranzani 1839), senior synonym of Mola ramsayi (Giglioli 1883), with designation of a neotype for Mola mola (Linnaeus 1758) (Tetraodontiformes: Molidae), Ichthyological Research, 65(1), 142-160, 201801
  29. Scaling mimesis: Morphometric and ecomorphological similarities in three sympatric plant-mimetic fish of the family Carangidae (Teleostei), PLoS ONE, 13(3), e0194437, 20180320
  30. Estivation grounds of the sand lance Ammodytes japonicus (Ammoditidae) in the Mihara Strait, mid-western Seto Inland Sea, Japan, Bulletin of the Hiroshima University Museum, 10, 19-27, 20181225
  31. Isolation, Characterization and PCR Multiplexing of Microsatellite Loci for Western Sand Lance (Ammodytes japonicus Duncker and Mohr 1939), JARQ-JAPAN AGRICULTURAL RESEARCH QUARTERLY, 52(4), 307-313, 20181119
  32. Age, growth and reproduction of the Asian sheephead wrasse Semicossyphus reticulatus in the western Seto Inland Sea, Japan, Ichthyological Research, 64(4), 415-422, 201711
  33. Feeding habits of the cutlass fish Trichiurus japonicus around Hiuchi-Nada, central Seto Inland Sea, Japan, NIPPON SUISAN GAKKAISHI, 83(1), 34-40, 201701
    Link to Paper Search Results by DOI
  34. Molecular and morphological identification of Mola sunfish specimens (Actinopterygii: Tetraodontiformes: Molidae) from the Indian Ocean, Species Diversity, 22, 99-104, 20170525
  35. Winter longitudinal variation in the body size of larval fishes in the Seto Inland Sea, Japan, FISHERIES SCIENCE, 83(3), 373-382, 20170323
    Link to Paper Search Results by DOI
  36. Emergence behavior of a tide pool fish Praealticus tanegasimae (Teleostei; Blenniidae) on subtropical reefs, Journal of Ethology, 34(2), 175-181, 20160305
  37. Morphometric comparisons of plant-mimetic juvenile fish associated with plant debris observed in the coastal subtropical waters around Kuchierabu-jima Island, southern Japan, PeerJ, 4:e2268, 20160726
    Link to Paper Search Results by DOI
  38. ★, Polygamous mating system and protogynous sex change in the gobiid fish Fusigobius neophytus, Journal of Ethology, 34(3), 263-275, 20160526
    Link to Paper Search Results by DOI
  39. Mating system of the freckled hawkfish, Paracirrhites forsteri (Cirrhitidae) on Kuchierabu-jima Island reefs, southern Japan, Environmental Biology of Fishes, 99, 761-769, 201608
  40. Comparative allometric growth of the mimetic ephippid reef fishes Chaetodipterus faber and Platax orbicularis, PLOS ONE, 10(12), 20151202
    Link to Paper Search Results by DOI
  41. First record of a moilid fish, Mola sp. A from Kyushu, Japan, 62(2), 201-202, 20151105
  42. Notes on the Morphological Characteristics of Extremely Large Specimens of Mola Sun shes(Tetraodontiformes, Molidae) in Japanese Museum Collections, 18, 65-70, 20151227
  43. Rapid acquisition of an appetitive conditioned response in an intertidal fish, Tridentiger trigonocephalus (Gobiidae), using an ethologically relevant conditioning paradigm, BEHAVIOUR, 150(6), 585-598, 2013
    Link to Paper Search Results by DOI
  44. Trophic adaptability of late juvenile Atlantic spadefish Chaetodipterus faber (Teleostei: Ephippidae) related to habitat preferences in an estuary in northeastern Brazil, HYDROBIOLOGIA, 717(1), 161-167, 201310
    Link to Paper Search Results by DOI
  45. Reversed sex change in the haremic protogynous hawkfish Cirrhitichthys falco in natural conditions, ETHOLOGY, 118(3), 226-234, 201203
    Link to Paper Search Results by DOI
  46. Better off alone than in bad company': agonistic colour display in mimetic juveniles of two ephippid species, JOURNAL OF FISH BIOLOGY, 81(3), 1032-1042, 201208
    Link to Paper Search Results by DOI
  47. Ovarian degeneration during the female-to-male sex change in the protogynous hermaphroditic fish, Halichoeres poecilopterus, ICHTHYOLOGICAL RESEARCH, 59(3), 276-281, 201207
    Link to Paper Search Results by DOI
  48. Molecular Cloning and Expression Profile of Sex-specific Genes, Figla and Dmrt1, in the Protogynous Hermaphroditic Fish, Halichoeres poecilopterus, ZOOLOGICAL SCIENCE, 29(10), 690-701, 201210
    Link to Paper Search Results by DOI
  49. Ultrastructure of the surface morphology of eggs in the terrestrial spawning blenny, Andamia tetradactyla (Blenniidae)., Jpn. J. Ichthyol., 58(1), 75-79, 2011
  50. Effects of prey density on nocturnal zooplankton predation throughout the ontogeny of juvenile Platax orbicularis (Teleostei: Ephippidae), ENVIRONMENTAL BIOLOGY OF FISHES, 91(2), 177-183, 201106
    Link to Paper Search Results by DOI
  51. Harem structure and female territoriality in the dwarf hawkfish Cirrhitichthys falco (Cirrhitidae), ENVIRONMENTAL BIOLOGY OF FISHES, 92(1), 79-88, 201109
    Link to Paper Search Results by DOI
  52. Diel and lunar spawning periodicity of the hawkfish Paracirrhites forsteri (Cirrhitidae) on the reefs of Kuchierabu-jima Island, southern Japan, ICHTHYOLOGICAL RESEARCH, 57(1), 102-106, 201001
    Link to Paper Search Results by DOI
  53. In-situ observations of symbionts on medusae occurring in Japan, Thailand, Indonesia and Malaysia, Bulletin of the Hiroshima University Museum, 2, 9-18, 2010
  54. Phylogenetic relationship of two Mola sunfishes (Tetraodontiformes: Molidae) occurring around the coast of Japan, with notes on their geographical distribution and morphological characteristics, ICHTHYOLOGICAL RESEARCH, 56(3), 232-244, 200907
    Link to Paper Search Results by DOI
  55. Feeding behavior of leaf-like juveniles of the round batfish Platax orbicularis (Ephippidae) on reefs of Kuchierabu-jima Island, southern Japan, JOURNAL OF ETHOLOGY, 26(2), 287-293, 200805
    Link to Paper Search Results by DOI
  56. Examination of the ability of gonadal sex change in primary males of the diandric wrasses Halichoeres poecilopterus and Halichoeres tenuispinis: estrogen implantation experiments, Zoological Science, 25(2), 220-224, 20080201
  57. Occurrence of the parasitic copepod Acanthochondria spirigera (Chondracanthidae) on anglerfish Lophius litulon in the East China Sea off western Japan., Journal of Graduate School ofBiosphere Science= Hiroshima University, 47, 17-22, 20081101
  58. Social control of terminal phase transition in primary males of the diandric wrasse, Halichoeres poecilopterus (Pisces: Labridae), Journal of Ethology, 25(1), 57-61, 20070401
  59. Diets of 45 fish species from 17 families at Kuchierabu-jima Island, 47, 5-13, 2007
  60. Terrestrial reproduction by the air-breathing fish Andamia tetradactyla (Pisces; Blenniidae) on supralittoral reefs., Journal of Zoology (London), 269, 357-364, 20060401
  61. Cloning of full-length cDNA of teleost corticotropin-releasing hormone precursor by improved inverse PCR, BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY, 70(8), 1983-1986, 200608
    Link to Paper Search Results by DOI
  62. Reproductive behavior of the largemouth triplefin, Ucla xenogrammus (Tripterygiidae) on reefs of Kuchierabu-jima Island, southern Japan, Ichthyological Research, 53, 415-418, 20060401
  63. Fish-egg predation by the small clingfish Pherallodichthys meshimaensis (Gobiesocidae) on the shallow reefs of Kuchierabu-jima Island, southern Japan, Environmental Biology of Fishes, 73, 237-242, 20050401
  64. Foraging behavior and diet composition of Trimma caudomaculata and T. caesiura (Gobiidae) on coral reefs in Okinawa, Japan, Ichthyological Research, 52, 302-305, 20050401
  65. Phylogenetic analysis among populations of the ocean sunfish Mola mola (Molidae) around the Japan coast, based on the mitochondrial DNA sequences., 13, 171-174, 20050401
  66. Preliminary study on female choice of mates versus sites in a wrasse Cirrhilabrus temminckii, Ichthyological Research, 52, 406-409, 20050401
  67. Fish fauna at reefs of the northern Tokara Islands, southern Japan, Journal of Graduate School ofBiosphere Science= Hiroshima University, 44, 1-14, 20051101
  68. Rapid transition in sexual behaviors during protogynous sex change in the haremic angelfish Centropyge vroliki (Pomacanthidae)., Ichthyological Research, 50(1), 30-35, 20030401
  69. ★, Sexually dichromatic protogynous angelfish Centropyge ferrugata males can change back to females., Zoological Science, 20(5), 627-633, 20030401
  70. Sleeping mound construction using coral fragments by the rockmover wrasse, Journal of Fish Biology, 63, 1352-1356, 20030401
  71. Modeling spawning strategy for sex change under social control in haremic angelfishes., Behavioral Ecology, 13(1), 75-82, 20020401
  72. ★, Reversed sex-change in the protogynous reef fish, Labroides dimidiatus., Ethology, 108, (443-450), 20020401
  73. Status-dependent behavioural sex change in a polygynous coral-reef fish, Halichoeres melanurus., Journal of Ethology, 20, (101-105), 20020401
  74. Spawning timing of the cleaner wrasse, Labroides dimidiatus in a warm temperate rocky shore., Ichthyological Research, 48, 23-30, 20010401
  75. ★, Effect of changing harem on timing of sex change in female cleaner fish Labroides dimidiatus., Animal Behaviour, 62, 251-257, 20010401
  76. ★, Female-female spawning and sex change in a haremic coral-reef fish, Labroides dimidiatus., Zoological Science, 17, 967-970, 20000401
  77. Predation risk affects female choice opportunity in a coral reef fish., Journal of Ethology, 18, 109-114, 20000401
  78. ★, Harem structure of the protogynous angelfish, Centropyge ferrugatus (Pomacanthidae)., Environmental Biology of Fishes, 49, 333-339, 19970401
  79. ★, Alternative spawning tactics of female angelfish according to two different contexts of sex change., Behavioral Ecology, 8(4), 372-377, 19970401
  80. Studies on the ecology of the polygynous angelfish Centropyge ferrugatus, 19970301
  81. Fecundity of female angelfish, Centropyge ferrugatus, independent of body size: field collection of spawned eggs., Ichthyological Research, 43(2), 186-189, 19960401
  82. Anti-egg predator behaviors of the small angelfish Centropyge ferrugatus (Pomacanthidae)., Environmental Biology of Fishes, 43, 401-405, 19950401
  83. Foraging by mixed-species groups involving a small angelfish, Centropyge ferrugatus (Pomacanthidae), Japanese Journal of Ichthyology, 41(4), 429-435, 19950401

Publications such as books

  1. 2022/12/14, Hermaphroditism and Mating Systems in Fish, Springer, 2023, Scholarly Book, Joint editor, E, Kuwamura T, Sawada K, Sunobe T, Sakai Y, Kadota T, 978-981-19-6094-9, 250, 127
  2. 2019/08/20, Integrated Coastal Management in the Japanese Satoumi - Restoring Estuaries and Bays, 3.3 Fish Productino and Preservation in Seto Inland Sea, Elsevier, 2019, 190820, Scholarly Book, Joint work, E, Takeshi Tomiyama, Jun-ya Shibata, Yoichi Sakai, 978-0-12-813060-5, 241, 241
  3. 2017/09/15, Ichthyology, Kouseisha, 2017, 9, Textbook, Joint work, J, 978-4-7699-1610-9, 377, 15
  4. 2013, Herbivory, Are Ephippid Fish a "Sleeping Functional Group"? ? Herbivory Habits by Four Ephippidae Species Based on Stomach Contents Analysis (Chapter 3), In Tech, Croatia, 2013, Scholarly Book, Joint work, English, Breno Barros, Yoichi Sakai, Hiroaki Hashimoto, Kenji Gushima, Yrlan Oliveira, Fernando Ara?jo Abrunhosa, Marcelo Vallinoto, 76, 33-46
  5. 1999/09, Jack Moyer's Ocean Adventures, 1999, 9, Joint Translation

Invited Lecture, Oral Presentation, Poster Presentation

  1. Why and how the small males occur in the polygamous mating groups of the protogynous goby Fusigobius neophytus (Gobiidae), Ryoga Seiwa, Yoichi Sakai, 11th Indo-Pacific Fish Conference, 2023/11/21, Without Invitation, Japanese, 2023 Joint IPFC – ASFB Conference Organising Committee, University of Auckland
  2. Examination of the function and evolutionary process of cleaner fish mimicry, Hajime Sato, Yoichi Sakai, Tetsuo Kuwamura, 11th Indo-Pacific Fish Conference, 2023/11/21, Without Invitation, English, 2023 Joint IPFC – ASFB Conference Organising Committee, University of Auckland
  3. Cleaner fish body coloration does not inhibit predation: testing the effect of protective mimicry in the false cleanerfish Aspidontus taeniatus, Hajime SATO, Yoichi SAKAI, Tetsuo KUWAMURA, Tetsuo KUWAMURA, 70th Annual Meeting of Ecological Society of Japan, 2023/03/17, Without Invitation, Japanese, Ecological Society of Japan
  4. Sexual patterns adapting to low density distribution in the goby Lubricogobius exiguus, Takumi OYAMA, Tomoki SUNOBE, Takayuki SONOYAMA, Shotaro TANI, Koichiro KAWAI and Yoichi SAKAI, Tomoki SUNOBE, Takayuki SONOYAMA, The 56th Annual Meeting, the Ichthyological Society of Japan, 2022/09/17, Without Invitation, Japanese, The Ichthyological Society of Japan
  5. Cleaner fish mimicry of the blenny Aspidontus taeniatus: a true picture revealed by interregional and interspecific comparisons, Tetsuo KUWAMURA, Hajime SATO and Yoichi SAKAI, Tetsuo KUWAMURA, The 56th Annual Meeting, Ichthyological Society of Japan, 2022/09/17, Without Invitation, Japanese, The Ichthyological Society of Japan
  6. Protective resemblance to floating pumice stones by juveniles of the rough triggerfish that drifted ashore around the Okinawa Islands, Hajime SATO, Yoichi SAKAI and Tetsuo KUWAMURA, Tetsuo KUWAMURA, The 56th Annual Meeting, Ichthyological Society of Japan, 2022/09/17, Without Invitation, Japanese, The Ichthyological Society of Japan
  7. The return of the narrow-ridged finless porpoise (Neophocaena asiaorientalis sunameri) to the northern Aki Nada area of the Seto Inland Sea, Manuel Eduardo de la Paz, Takumi Oyama, Hajime Sato, Sadaharu Iwasaki, Yoichi Sakai, Japan Ethological Society 41st Annual Meeting, 2022/11/22, Without Invitation, Japanese
  8. Relationship between group behavior and cleaner fish mimicry in the false cleanerfish Aspidontus taeniatus, Sato H, Sakai Y, Kuwamura T, 18th International Society for Behavioral Ecology Congress, 2022/08/02, Without Invitation, English, International Society for Behavioral Ecology, Stockholm, Sweden
  9. Function of mimicry in the false cleanerfish Aspidontus taeniatus (Blenniidae) examined by its breeding and feeding behaviors, Hajime SATO, Yoichi SAKAI, Tetsuo KUWAMURA, The 67th Annual Meeting of the Ecological Society of Japan, 2020/03/07, Without Invitation, English, Ecological Society of Japan
  10. Publication of the database of hermaphroditic fish species with verification of the size-advantage model, Tetsuo KUWAMURA, Tomoki SUNOBE, Yoichi SAKAI, Tatsuru KADOTA and Kota SAWADA, 2019th Annual Meeting of the Ichthyological Society of Japan, 2019/09/21, Without Invitation, Japanese, The Ichthyological Society of Japan, Kochi University
  11. Reproductive ecology of the false cleanerfish Aspidontus taeniatus (Blenniidae), Hajime SATO, Yoichi SAKAI, Tetsuo KUWAMURA, 2019th Annual Meeting of the Ichthyological Society of Japan, 2019/09/21, Without Invitation, Japanese, The Ichthyological Society of Japan, Kochi University
  12. Cryptical sex change as a mating tactic in a coral dwelling polygynous damselfish Dascyllus reticulatus, Rei Sakanoue, Yoichi Sakai, The 10th Indo-Pacific Fish Conference, 2017/10/04, Without Invitation, English, David Leccini, Tahiti, French Polynesia
  13. Sex change, mating system, and effect of population density in reef fish, Tetsuo Kuwamura, Tomoki Sunobe, Yoichi Sakai, Tetsuo Kuwamura, Tomoki Sunobe, The 10th Indo-Pacific Fish Conference, 2017/10/04, Without Invitation, English, David Leccini, Tahiti, French Polynesia
  14. Strict pair-bond and stable territories of the vagabond butterflyfish, Chaetodon vagabundus performing spawning migration, Azusa Endo, Yoichi Sakai, The 10th Indo-Pacific Fish Conference, 2017/10/04, Without Invitation, English, David Leccini, Tahiti, French Polynesia
  15. The cleaner's mimic Aspidontus taeniatus utilizes the effect of aggressive mimicry only when it is small, Misaki Fujisawa, Yoichi Sakai, Tetsuo Kuwamura, Tetsuo Kuwamura, The 10th Indo-Pacific Fish Conference, 2017/10/03, Without Invitation, English, Chairman Dr. David Lecchini and the Organizing Committee, Tahiti, French Polynesia
  16. Effects of population density on the sexual patterns and mating systems in fish, 2017/09/17, Without Invitation, Japanese
  17. Benefits of resemblance in the cleaner's mimic Aspidontus taeniatus: various ways of feeding and population dynamics on the coral reef of Sesoko Island, Okinawa, Fujisawa M, Y. Sakai, T. Kuwamura, The 22nd International Congress of Zoology, 2016/11/14, Without Invitation, Japanese, OIST and The Zoological Society of Japan, Okinawa Convention Center
  18. Mystery of the cleaner's mimic: seasonal population dynamics of the blenny Aspidontus taeniatus, Kuwamura T, Fujisawa M, Sakai Y., 2016/09/23, Without Invitation, Japanese, The Ichthyological Society of Japan
  19. Preserence for a sandy bottom substrate by the sand lance Ammodytes japonicus in the mid-western Seto Inkand Sea, witho notes on the behaviors under the sand, 2016/09/23, Without Invitation, Japanese
  20.  Mystery of the cleaner's mimic: various ways of feeding and the possibility of aggressive mimicry in the blenny Aspidontus taeniatus on the coral reef of Sesoko Island, Okinawa, Fujisawa M, Sakai Y, Kuwamura T., 2016/09/23, Without Invitation, Japanese
  21. Association of mimic juvenile fish with mangrove plants: insight into the use of mangrove habitats as nurseries fro juvenile fish, 2014, Without Invitation

Awards

  1. 2021/09/18, 2021 Best Paper Award of the Ichthyological Society of Japan, The Ichthyological Society of Japan
  2. 2019/09/22, The best poster presentation award, The Ichthyological Society of Japan, Reproductive ecology of the false cleanerfish Aspidontus taeniatus (Blenniidae)
  3. 2019/11/23, The best poster presentation award, Japan Ethological Society, 掃除魚に擬態するニセクロスジギンポの卵食と群れ行動

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2022, 2024
  2. 2022, 2022
  3. 2021, 2021
  4. 2020, 2020
  5. 2019
  6. 2019
  7. 2019, 2022
  8. 2018
  9. 2018
  10. 2018
  11. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2018, 2021
  12. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2022, 2024
  13. 2017
  14. 2017
  15. 2017
  16. KAKENHI, 2016, 2018
  17. 2016
  18. KAKENHI, 2015, 2017
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  19. 2015
  20. 2014
  21. KAKENHI, 2012, 2014
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  22. KAKENHI, 2012, 2014
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  23. KAKENHI, 2012, 2015
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  24. KAKENHI, Social determination of sex in fishes : testing reversed sex change under low density conditions, 2009, 2011
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  25. Inamori Foundation Grant, 2005
  26. KAKENHI, 2005, 2007
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  27. KAKENHI, Contribution assessment of hatchery origin black sea bream Acanthopagrus schlegeli into natural populations using microsatellite markers, 2002, 2005
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  28. KAKENHI, 2000, 2001
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Social Activities

History as Committee Members

  1. Chairman of Election Admistration Committee, 2024/05/28, 2024/12/31, Japan Ethological Society
  2. Chairman of the Award Selection Committee, Japan Ethological Society, 2022/01, 2022/12, Japan Ethological Society
  3. Japan Ethological Society Award Selection Committee Members, 2021/01, 2022/12, Japan Ethological Society
  4. Secretary of Japan Ethological Society, 2018/01, 2018/12, Japan Ethological Society
  5. Council Members, 2017/01, 2018/12, Japan Ethological Society
  6. Secretary of Japan Ethological Society, 2017/01, 2017/12, Japan Ethological Society
  7. Recommendation of scientists to be nominated for The 33th Kyoto Prize, 2016/06, 2016/09, Inamori Foundation
  8. Secretary, 2016/01, 2016/12
  9. Secretary, 2015/01, 2016/12

Organizing Academic Conferences, etc.

  1. 2004/05
  2. 2005/05
  3. 2006/02
  4. 2013/11, 2013/12
  5. SMART Oceans and Fisheries, Pukyong National University and Hiroshima University Joint Symposium, Coordinator, 2014/11, 2014/11
  6. 2012/02, 2012/02
  7. 2018/02, 2018/02