Toshiya Hashimoto

Last Updated :2020/10/16

Affiliations, Positions
Graduate School of Integrated Sciences for Life, Associate Professor
E-mail
thasimthiroshima-u.ac.jp

Basic Information

Academic Degrees

  • Doctor of Science, Kyushu University
  • Master of Engineering, Ehime University

Research Fields

  • Agricultural sciences;Applied aquatic science;Aquatic bioproduction science

Research Keywords

  • Ecosystem
  • Coastal Waters
  • transport of matter

Educational Activity

Course in Charge

  1. 2020, Liberal Arts Education Program1, 1Term, Elements of Information Literacy
  2. 2020, Undergraduate Education, Intensive, Topics in Integrated Ecoscience I
  3. 2020, Undergraduate Education, 1Term, Environmental Sciences for Bioproduction
  4. 2020, Undergraduate Education, Intensive, Laboratory Work in General Biology I
  5. 2020, Undergraduate Education, 2Term, Reading of Foreign Literature
  6. 2020, Undergraduate Education, 3Term, Research Front of Applied Biological Science
  7. 2020, Undergraduate Education, Intensive, Laboratory and Field Works of Environmental Biology
  8. 2020, Undergraduate Education, Academic Year, Graduation Thesis
  9. 2020, Undergraduate Education, 4Term, Hydrospheric Environmental ScienceI
  10. 2020, Undergraduate Education, Intensive, Seminar in Fildwork on Community Coasts
  11. 2020, Graduate Education (Master's Program) , 2Term, Numerical Model Analysis of Marine Ecosystem ( Fundamental Course )
  12. 2020, Graduate Education (Master's Program) , 4Term, Numerical Model Analysis of Marine Ecosystem ( Applied Course )
  13. 2020, Graduate Education (Master's Program) , 2Term, Fisheries Oceanography I
  14. 2020, Graduate Education (Master's Program) , 4Term, Fisheries Oceanography II

Research Activities

Academic Papers

  1. Artificial midlayer seafloor: simple and new devices to reduce organic loads from oyster rafts to the sediment, NIPPON SUISAN GAKKAISHI, 70(5), 722-727, 2004
  2. Evaluation of benthic nutrient fluxes and their importance in the pelagic nutrient cycles in Suo Nada, Japan, FISHERIES SCIENCE, 71(3), 593-604, 2005
  3. Phosphorus and nitrogen cyclings in the pelagic system of Hiroshima Bay: Results of numerical model simulation, JOURNAL OF OCEANOGRAPHY, 62(4), 493-509, 2006
  4. Spatial and Temporal Variations of Biophilic Elements in Hiroshima Bay, Japan, during 1991-2000, with Spetial References to Deviation of Phytoplankton C:N:P Ratio from Redfield Ratio, Bulletin on Coastal Oceanography, 39(2), 163-169, 20020201
  5. Importance of Oceanic Nitrogen and Phosphorous in the Seto Inland Sea, Japan, Journal of Graduate School ofBiosphere Science= Hiroshima University, 43(1), 7-13, 20041101
  6. ★, Influence of Estuarine Circulation on the Biological Production of the Northern Hiroshima Bay, Japan, in Summer Season, Bulletin of Japanese Society of Fisheries Oceanography, 70(1), 23-30, 20060201
  7. Bihavior of Small Particles in the High Turbidity Water from Sea Sand Mining - Characteristics and Sinking rate -, Bulletin on Coastal Oceanography, 43(2), 157-162, 20060201
  8. Dispersion of the Small Particles in the High Turbidity Water from Sea Sand Mining Boat, 45(1), 31-36, 20061201
  9. Estuarine Circulation and Primary Production, Bulletin on Coastal Oceanography, 44(2), 137-145, 20070201
  10. Investigation of Water Quality Characteristics of the Seto Inland Sea, 43(1), 41-54, 20041101
  11. Phosphorus and nitrogen cyclings in the pelagic system of Hiroshima Bay: Results from numerical model simulation., J. Oceanogr., 62, 493-509, 20060901
  12. Estuarine circulation and primary production, Bulletin on Coastal Oceanography, 44, 137-145, 20070201
  13. Sinking and dispersion of residual feed in a fish (yellowtail) aquaculture farm, NIPPON SUISAN GAKKAISHI, 75(4), 666-673, 20090701
  14. Spatial and temporal variations of sediment quality in and around fish cage farms: A case study of aquaculture in the Seto Inland Sea, Japan, FISHERIES SCIENCE, 67(4), 619-627, 2001
  15. Comparison of sediment quality between Hiroshima Bay and Suo Nada-Special reference to the seasonal variations of sediment quality parameters and their relationships, NIPPON SUISAN GAKKAISHI, 74(6), 1037-1042, 2008
  16. Contribution of benthic microalgae to the whole water algal biomass and primary production in Suo Nada, the Seto Inland Sea, Japan, JOURNAL OF OCEANOGRAPHY, 65(3), 311-323, 42895
  17. Primary productivity sustaining the fisheries in the Seto Inland Sea., 16(1), 150-153, 19940401
  18. Seasonal inverstigation of water quality characteristics of the Seto Inland Sea, 35(1), 243-274, 19961201
  19. Results of seasonal observations on sediment quality in the Seto Inland Sea, 36(1), 43-49, 19970401
  20. A Study on the Sediment Quality of the Sea off Fukuyama, the Seto Inland Sea, Japan, 38(1), 39-45, 19990701
  21. Phytoplanktonic N : P ratio in waters of the Seto Inland Sea, Japan, and the possible factors affecting its fluctuation, Bulletin of Japanese Society of Fisheries Oceanography, 63(3), 6-13, 19990801
  22. Spatial and temporal variations of sediment quality in and around fish cage farms : A case study of aquaculture in the Seto Inland Sea, Japan, Fishries Science, 67(4), 619-627, 20010801
  23. Average residence time of matter in a transport system in cluding biochemical processes, Continental Shelf Res., 8(11), 1247, 19881101
  24. ★, Analysis of Primary Production in the Seto Inland Sea, Japan, Using a Simple Ecosystem Model., Journal of Oceanotraphy, 54(2), 123-132, 19980401
  25. Primary Production of Phytoplankton in and around the Tidal Front, Bulletin on Coastal Oceanography, 33(1), 19-27, 19950801
  26. Experimental and Theoretical Analyses of the Variation in Phosphorus Cell Quata of Phytoplankton, Umi no Kenkyu, 6(1), 1-9, 19970201
  27. Characteristics of Meteorogical Conditions in the Years of Intensive Red Tide Occurrence in Mikawa Bay, Japan, Bulletin of Japanese Society of Fisheries Oceanography, 61(2), 114-122, 19970401
  28. Estimation of Bentic Fluxes of Dissolved Inorganic Nitrogen and Phosphorus from Sediments of the Seto Inland Sea, Umi no Kenkyu, 7(3), 151-158, 19980201
  29. Relationship Observed among Loss of Ignition , Oxidation-Reduction Potential and Acid-Volatile Shulfide Content of Surfase Sediment from the Seto Inland Sea, Japan., Bulletin on Coastal Oceanography, 36(2), 171-176, 19990201
  30. Middle layer intrusion as an important factor supporting phytoplankton productivity at a tidal front in Iyo Nada, the Seto Inland Sea, Japan., Journal of Oceanography, 56(2), 131-139, 20000401
  31. Modelling the population dynamics of the toxic dinoflagellate Alexandrium tamarense in Hiroshima Bay, Japan., Journal of Plankton Research, 22(1), 33-47, 20020201
  32. Possibility of Red Tide Monitoring Using Satellite Ocean Color, Bulletin on Coastal Oceanograkhy, 39(1), 15-19, 20010801
  33. Behaviour od PCB in Tokyo Bay, Bulletin on Coastal Oceanography, 37(2), 25-28, 20000201
  34. Distribution and Sedimentation Model of PCB in Tokyo Bay, 36(1), 77-82, 19980801
  35. Standing stocks and production rates of phytoplankton and abandance of bacteria in the Seto Inland Sea, J. of ceanography, 54(2), 285-295, 19980601
  36. ★, Optical Properties of Sea Water in Hiroshima Bay, Japan, 6(3), 151-155, 19970601
  37. A Numerical Model of the Material Cycling in the Ground of Yellowtail Culture, 52(3), 213-220, 19880701
  38. Relationship between chlorophyll a concentration at the sea surface and standing stock of chlorophyll a in the euphotic layer in the Seto Inland Sea, Japan, Journal of Faculty of Applied Biological Science= Hiroshima University, 38(1), 121-129, 20000101
  39. Oceanographic Characteristics of Hiroshima Bay - Seasonal and Spatial Variations from 1989 to 1993 -, 33(1), 9-19, 19940601
  40. Shelf Slope Upwelling of High Nutrient Bottom Water in the Bungo Channel, 34(1), 161-165, 19951201
  41. Oyster Culture and marine Environment in Hiroshima Bay, 24(2), 199-206, 20020901
  42. Size Fractionations of Phytoplankton Community in Osaka Bay and Kii Channel, 40(2), 197-204, 20030201
  43. Artificial Midlayer Seafloor: Simple and New Devices to Reduce Organic Loads from Oyster Rafts the Sediment, 70(5), 722-727, 20040701
  44. Evaluation of benthic nutrient fluxes and their importance in the pelagic nutrient cycles in Suo Nada, Japan., Fisheries Science, 71(3), 593-604, 20050701
  45. Modelling the population dynamics of the toxic dinoflagellate Alexandrium Tamarense in Hiroshima Bay, Japan, JOURNAL OF PLANKTON RESEARCH, 24(1), 33-47, 2002
  46. Effects of culture density on the growth and fecal production of the oyster Crassostrea gigas, NIPPON SUISAN GAKKAISHI, 75(2), 230-236, 2009
  47. Sinking and dispersion of residual feed in a fish (yellowtail) aquaculture farm, NIPPON SUISAN GAKKAISHI, 75(4), 666-673, 2009