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.

挤压中的招聘成功在很大程度上取决于产卵和托儿所的环境条件。日本普通鱿鱼的秋季和冬季产卵群体，太平洋的Todarodes具有最大的生物量，冬季群体的年度捕获量也广泛波动。 T.pacificus产生含有许多小鸡蛋的凝胶状，几乎浮力的卵子。卵质量被认为在适合卵发育的温度（例如，在t.pacificus中）和预测降低的条件下发生在适合卵发育的温度下或高于pycnocine。孵化后，大概是降临的层上升到表面层，并将冒险成趋同的额叶区域，我们观察到类似于pycnocline在70-120 m深度（温度范围：18-21℃）tsushima电流中的pycnocline内的t.pacificus卵子质量。我们还从在18-23℃的温度下孵化到表面的实验室研究估计。我们使用了这种新的生殖假设来估计T.pacificus的冬季产卵区。先前研究的结果表明，在弱风和温度温暖的气温时期，T.pacificus的年捕获量增加，这表明冬季风的强度可能会影响募集。据估计，在1990年代之后的温暖政权期间，冬季产卵组的产卵区估计沿着九州岛和纳米群岛的大陆边缘。黑发的内流将在地表层中从产卵区域运输到沿着连续边缘东北的托儿所。但是，沿着连续的边缘降低了1980年代凉爽状态的产卵区。我们可以介绍一个方案，即由于海面温度等环境因素，PACACIFICUS中的库存规模可能会波动，并建议如何预测与气候状况变化和全球变暖有关的库存波动。

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。