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Reproduction and Recruitment Success of the Japanese Common Squid, Todarodes pacificus, related to Annual and Seasonal Changes of Winter Wind Stress and Mixed Layer Depth.

日本鱿鱼（Todarodes pacificus）的繁殖和补充成功与冬季风应力和混合层深度的年度和季节变化有关。

基本信息

批准号：
15380127
负责人：
SAKURAI Yasunori
金额：
$ 9.86万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

Recruitment success in squids depends largely on environmental conditions at the spawning and nursery grounds. The autumn and winter spawning groups of Japanese common squid, Todarodes pacificus have the largest biomass and the annual catch of winter groups have fluctuated widely. T.pacificus produces gelatinous, nearly neutrally buoyant egg masses that contain many small eggs. The egg masses are thought to occur within or above the pycnocline at temperatures suitable for egg development (e.g., 15-23℃ in T.pacificus) and under conditions of reduced predation. After hatching, the paralarvae presumably ascend to the surface layer and are advected into convergent frontal zones We observed something resembling a T.pacificus egg mass within the pycnocline at 70-120 m depth (temperature range : 18-21℃) in the Tsushima Current using an ROV. We also estimated from laboratory studies that hatchlings ascend to the surface at temperatures of 18-23℃. We used this new reproductive hypothesis to estimate winter spawning areas of T.pacificus. Results of a previous study suggested that annual catches of T.pacificus increased during periods of weak winds and warm air temperature, suggesting that the strength of winter winds may affect recruitment. The spawning areas of winter spawning group during warm regime after 1990's were estimated to be along the continental edge off the Kyushu Island and the Nansei Islands. Inner flow of Kuroshio will transport paralarvae in surface layer from the spawning areas to the nursery areas of northeastward along the continental edge. However, the spawning areas during cool regime during 1980's were reduced along the continental edge. We can present a scenario for how stock size in T.pacificus might fluctuate due to environmental factors such as sea surface temperatures and suggest how to forecast the stock fluctuation related to climatic regime shifts and global warming.

鱿鱼的招聘成功在很大程度上取决于产卵和育苗场的环境条件。太平洋褶柔鱼（Todarodes pacificus）的秋、冬季产卵群体生物量最大，冬季群体的年渔获量波动较大。太平洋锥虫产生凝胶状的、几乎中性浮力的卵团，其中包含许多小卵。卵块被认为在适合卵发育的温度下发生在密度跃层内或之上（例如，15-23℃）和捕食减少的条件下。在对马海流70-120 m（温度范围18-21℃）的密度跃层内，我们观察到了类似太平洋柔鱼卵块的东西。根据实验室研究，我们还估计，孵化出的幼体在18-23℃的温度下上升到表面。我们用这个新的生殖假设来估计冬季产卵区的太平洋三角洲。先前的一项研究结果表明，在弱风和暖空气温度期间，太平洋鲑的年捕获量增加，这表明冬季风的强度可能会影响补充。90年代以后暖期冬季产卵群的产卵区主要分布在九州岛和南西诸岛附近的大陆边缘沿着。黑潮的内流将黑潮表层的浮游生物沿大陆边缘向东北沿着从产卵区输送到育苗区。80年代冷温期的产卵区沿着大陆边缘减少。我们可以提出一个方案，如何在T.pacificus的股票大小可能会波动，由于环境因素，如海面温度和建议如何预测股票波动与气候制度的转变和全球变暖。

项目成果

期刊论文数量（12）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Possible spawning by the Japanese common squid, Todarodes pacificus at Yamato Rise, Sea of Japan

日本海大和海隆可能由日本普通鱿鱼 Todarodes pacificus 产卵

DOI：
发表时间：
2005
期刊：
Phuket Marine Boiological Center, Research Bulletin 66
影响因子：
0
作者：
T.Hata;V.Castro;M.Fujisawa;Y.Imamura;S.Bonnamy;P.Bronsveld;H.Kikuchi;T.Shimura
通讯作者：
T.Shimura

Y.Iwata: "Characterization of microsatellite markers in the squid Loligo bleekeri (Cephalopoda : Loliginidae)"Molecular Ecology Notes. (2003)3. 392-393 (2003)

Y.Iwata：“鱿鱼 Loligo bleekeri（头足纲：Loliginidae）微卫星标记的表征”分子生态学笔记。