2013 Fiscal Year Final Research Report

Importance of the piscivory for Pacific bluefin tuna larvae revealed by the mass rearing technique

Research Project

Project/Area Number	24780197
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	General fisheries
Research Institution	Fisheries Research Agency
Principal Investigator	TANAKA Yosuke 独立行政法人水産総合研究センター, 西海区水産研究所, 主任研究員 (70454626)
Project Period (FY)	2012-04-01 – 2014-03-31
Keywords	クロマグロ / 魚食性 / 成長 / 安定同位体比 / 耳石
Research Abstract	The shift of feeding habits from zooplankton to fish larvae occurs in their early life stage of Pacific bluefin tuna. We conducted the rearing experiments in order to elucidate the importance of the piscivory for growth and survival of Pacific bluefin tuna larvae. A series of the experiments revealed that the piscivory played an important role for the growth and survival of the reared tuna larvae and the growth and survival of tuna larvae largely depended on their feeding condition of the prey fish larvae. These results contribute to not only the understanding of the inter-annual variations in recruitment success but also the developments of mass-culture technique for aquaculture of the present species.

(3 results)