Early life and environment for feeding habit and optimum survival environment of oceanic squid relating to spawning and recruitment success

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450276
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aquatic bioproduction science
• Research Institution: Fisheries Research and Education Agency
• Principal Investigator: Sakai Mitsuo 国立研究開発法人水産研究・教育機構, 東北区水産研究所, 主幹研究員 (70371937)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: アカイカ科イカ類 / 人工授精 / 初期生活 / 日齢査定 / 胚発生

Outline of Final Research Achievements

We aimed to identify the physical environmental conditions that affect survival and growth by conducting experiments using recently developed artificial fertilization method, focusing on elucidating the survival strategy of hatching larvae of ommastrephid squid. We demonstrated the embryonic developmental characteristics, developmental speed and mortality of each developmental stage for the neon flying squid at each incubating water temperature. The rearing experiment revealed that the optimal spawning temperature for neon flying squid is between 16 oC and 25 oC. In addition, we observed embryonic development at 20 oC of fertilized eggs spawned incidentally by a copulated mature female jumbo flying squid rearing in a tank on board. The embryonic development from fertilization to hatching was compared with other ommastrephid squid. The result suggested that the embryonic developmental speed between ommastrephid species until hatching at same rearing temperature was not different.

Free Research Field

イカ資源、水産生物の初期生態