2011 Fiscal Year Final Research Report
Quality changes of fish larvae through manipulation of feeding regimes and their mechanisms.
| Project/Area Number |
21380125
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | Nagasaki University |
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Principal Investigator |
HAGIWARA Atsushi 長崎大学, 大学院・水産・環境科学総合研究科, 教授 (50208419)
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| Co-Investigator(Renkei-kenkyūsha) |
SAKAKURA Yoshitaka 長崎大学, 大学院・水産・環境科学総合研究科, 教授 (20325682)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 動物プランクトン / 餌料生物 / 仔魚飼育 / 行動 / 餌料系列 |
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| Research Abstract |
Culture collection of zooplanktons has been conducted through selection, breeding and field sampling. By feeding them to five species of marine fish larvae, the following findings have been obtained ; 1) Japanese flounder larvae grew better by feeding brackish cladoceran Diaphanosoma celebensis, comparing to the feeding of Artemia franciscana, 2) When small sized zooplanktons were fed to fish larvae with smaller mouth such as seven-band grouper, rusty angelfish, and humphead wrasse, the minute rotifer Proales similis was ingested most efficiently. These larvae shifted preference to larger food according to their growth, and resulting in better growth and survival. Japanese eel larvae(large mouth, but narrow pharynx) could also ingest P. similis. HUFA was successfully enriched to P. similis, and its mass culture could be conducted using batch culture method.
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