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Sparial/temporal feeding strategies of pelagic copepod commonities

Research Project

Project/Area Number 10660180
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionHiroshima University

Principal Investigator

OHTSUKA Susumu  Hiroshima University, Faculty of Applied Biological Science, Associate Professor, 生物生産学部, 助教授 (00176934)

Co-Investigator(Kenkyū-buntansha) NISHIDA Shuhei  University of Tokyo, Ocean Research Institution, Associate Professor, 海洋研究所, 助教授 (70134658)
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1998: ¥2,200,000 (Direct Cost: ¥2,200,000)
Keywordscopepod / detritus / carnivore / phytoplankton / Tortanus / Macandrewella / Cephalophanes / harpacticoid / ハルパクチフス目 / 甲殻類 / 近底層 / レンズ / Neocalanus / 性的二型 / 珪藻類 / 禍鞭毛藻類 / 中海 / Oithona
Research Abstract

1. A neritic calanoid copepod Tortanus (Atortus), which is a carnivore feeding on small copepods such as Oithona, was observed forming swarms during the day. Their swarming may function, not only as an antipredation against visual predators such as fish, but also a foraging strategy to detect prey copepods.
2. A deep-sea hyperbenthic calanoid copepod Macandrewella is a special detritivore utilizing crustacean carsasses and/or molts. The genus bears a medial cephalic lens which is rarely found in the family Scolecitrichidae, Another deep-sea calanoid Cephalophanes with much more developed and specialized optical sensors than in Macandrewella is also a detritivore feeding mainly on crustacean carcasses/molts. Considering their similar feeding habits and developed optical sensors, these organs may function in detecting bioluminescent bacteria inhabiting on crustacean detrital matter.
3. Shallow-water demersal calanoid copepods such as Pseudodiaptomus and Pseudocyclops utilize benthic algae … More in addition to pelagic ones. A cavernicolous calanoid Ridgewayia stygia fed on crustacean remains.
4. A deep-sea carnivorous catanoid Euaugaptilus bears special setae called "button setae" on the maxilla and maxilliped. The "button" may function as a shock absorber white their prey is struggling. The number, disposition and fine structure of the buttons vary among congeners.
5. Pelagic harpacticoid such as Euterpina acutifrons, Microsetella norvegica and Aegisthus murconatus fed mainly on small algae ranging from 4 to 15 μm in largest dimension. In addition, A.mucronatus frequently fed on crustacean remains.
6. Ratios of the maxillary and maxillipedal lengths to the body length are measured in 85 species of oceanic, neritic and brackish calanoid copepods. Only oceanic carnivores bear extremely elongate maxillae (>30% in Candaciidae) or maxillipeds (>40% in Euchaetidae and Chiridiella). The appendage elongation seems to guarantee effective capture of prey zooplankters in oligotrophic waters. However setal ornamentations on these mouthpart appendages greatly vary among these carnivores, suggesting that they employ different feeding modes to result in food segregation. Ratios of the maxilla and maxilliped in particle feeders fall within 5-15% and 10-40%, respectively. Less

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Susumu Ohtsuka: "Taxonomy, tonchional morphology, and behavioral ecology of the rlanktonic calanoid copepod Tortanus(Atortos)"Crustacean Research. 29. 1-11 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Susumu Ohtsuka: "A new species of Ridgewayia (Copepoda : Calanoida) from a submarine cave in Palau, Western Pacific"Species Diversity. 5. 201-213 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Susumu Ohtsuka: "Three new species of the genes Macandrewella (Copepoda : Calancida : Scolecitrichidae) from the Pacific Ocean, with notes on distribution and feeding habits"Journal of Natural History. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Susumu Ohtsuka: "Taxonomy and feeding ecology of demersal calanoid copepods collected from Thafland"Proceedings of the tenth JSPS joint Seminar on marine and fishery sciences. 133-147 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kazuya Nagasawa: "Abondance and in-situ feeding habits of Neocalanus cristatas(Copepoda : Calanoida) in the central and western North Pacific Ocean in summer and winter"Bulletin of the National Research Institute of Far Seas Fishories. 38(印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hiroyuki Matoura: "Fine structure of the "button setae" in the deep-sea polagic copepods of the genes Euaugapfilus(Colanoida :Augaptilidae)"Morine Biology. 137. 339-345 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsuura, H.& S.Nishida: "Fine structure of the "button setae" in the deep-sea pelagic copepods of the genus Euaugaptilus (Calanoida : Augaptilidae)."Marine Biology. 137. 339-345 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ohtsuka, S., M.M.El-Sherbiny & H.Ueda: "Taxonomy, functional morphology, and behavioral ecology of the planktonic calanoid copepod Tortanus (Atortus)."Crustacean Research. 29. 1-11 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ohtsuka, S., T.Kase & G.A.Boxshall: "A new species of Ridgewayia (Copepoda : Calanoida) from a submarine cave in Palau, Western Pacific."Species Diversity. 5. 201-213 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ohtsuka, S., K.Nagasawa & K.Gejima: "Review of parasites of marine zooplankton"Bulletin of Plankton Society of Japan. 47(in Japanese with English abstract).. 1-16 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ohtsuka, S., S.Putchakarn, K.Pinkaew & S.Chullasorn: "Taxonomy and feeding ecology of demersal calanoid copepods collected from Thailand."Proceedings of the Tenth JSPS joint seminar on Marine and Fishery Sciences. 133-147 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nagasawa, K., S.Ohtsuka, S.Saeki, S.Ohtani, G.H.Zhu & A.Shiomoto: "Abundance and In-situ feeding habits of Neocalanus cristatus (Copepoda : Calanoida) in the central and western North Pacific Ocean in summer and winter."Bulletion of the National Research Institute of Far Seas Fisheries. 38(in press.).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ohtsuka, S., S.Nishida & K.Nakaguchi.: "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. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Susumu Ohtsuka: "Taxonomy, functional morphology, and behavioral ecology of the planktonic calanoid copepod Tortanus (Atortus)"Crustacean Research. 29. 1-11 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Susumu Ohtsuka: "A new species of Ridgewayid (Copepoda : Calanoida) from a submarine cave in Palau, Western Pacific"Species Diversity. 5. 201-213 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Susumu Ohtsuka: "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. (印刷中).

    • Related Report
      2000 Annual Research Report
  • [Publications] Susumu Ohtsuka: "Taxonomy and feeding ecology of demersal calanoid copepods collected from Thailand"Proceedings of the tenth JSPS joint seminar on marine and fisher. Sciences. 133-147 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kazuya Nagasawa: "Abundance and in-situ feeding habits of Neocalanus cristatus (Copepoda : Calanoida) in the central and western North Pacific Ocean in summer and winter "Bulletin of the National Researsh Institute of Far Seas Fisheries. 38(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hiroyuki Matsuura: "Fine Structure of the "button setae" in the deep-sea polagic copepods of the genus Euaugaptilus (Calanoida : Augaptilidae)"Marine Biology. 137. 339-345 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Susumu Ohtsuka: "Three new species of the demersal calanoid copepod Pseudocyclops from Phuket, Thailand"Plankton Biology and Ecology. 46. 132-147 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 大塚攻: "中海における動物プランクトン,特にカイアシ類の食性について"Laguna(汽水域研究). 6. 89-105 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 大塚攻: "中海本庄工区内外における動物プランクトン群集の季節変動"Laguna(汽水域研究). 6. 73-87 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Susumu Ohtsuka: "Sexual dimorphism in calanoid copepods:morphology and function"Hydrobiologia. (印刷中).

    • Related Report
      1999 Annual Research Report
  • [Publications] 大塚攻: "海洋動物プランクトンの寄生生物(総説)"日本プランクトン学会報. 47. 1-16 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 大塚攻: "日本およびその周辺水域における浮遊性カイアシ類の動物地理(総説)" 日本プランクトン学会報. 46(1). 1-19 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 大塚攻: "中海における動物プランクトン,特にカイアシ類の食性について" ラグナ. No.6(未定). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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