Impacts of environmental variability on the growth and survival of larval sardine and anchovy in the Kuroshio and its extension

环境变化对黑潮及其延伸区沙丁鱼和鳀鱼幼体生长和存活的影响

• 批准号: 23310002
• 负责人: ITOH Sachihiko
• 金额: $ 11.32万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23310002/
• 关键词: 生物海洋; 生物輸送・拡散; 環境動態解析

In order to clarify growth and survival processes of Japanese sardine and Japanese anchovy in areas around the Kuroshio and its extension, larval sampling, otolith microstructure analyses, observations of environmental condition, and numerical experiments were conducted. During the period from 2006 to 2012, larval density fluctuated interannually, reflecting the fluctuations of the abundances of whole stock level of each species. However, spatial distribution showed large variations that were related to the structure of the path of the Kuroshio. The results of particle tracking experiments suggested that short-term variations of the path of the Kuroshio drastically changed the transport and growth rates of larvae. While the growth rates showed positive correlation with temperature for both of the two species, there were significant differences when the samples were divided by years. Survival processes were suggested to be the important factors affecting these relationships.

为了阐明黑潮及其延伸区日本沙丁鱼和日本的生长和存活过程，进行了幼鱼取样、耳石显微结构分析、环境条件观测和数值试验。2006 - 2012年，幼虫密度年际波动，反映了各物种总资源丰度水平的波动。然而，空间分布表现出较大的变化，这与黑潮的路径结构有关。粒子追踪实验结果显示，黑潮路径的短期变化会大幅改变仔稚鱼的输移与生长速率。两种植物的生长速率均与温度呈正相关，但按年份划分的生长速率差异显著。生存过程被认为是影响这些关系的重要因素。

项目成果

冬季黒潮続流域のクロロフィルa濃度Lagrange観測

冬季黑潮延伸区叶绿素a浓度的拉格朗日观测

• 发表时间: 2012
• 作者: 福永早央里;嶋本顕;田原栄俊;魯 冠洋・池谷康祐・渡辺 彰;伊藤幸彦
• 通讯作者: 伊藤幸彦

Distribution of calanoid copepods of the genus Paracalanus around the Izu Ridge, south of Japan, and extent of ‘island mass effect’ in the region,

日本南部伊豆海岭周围 Paracalanus 属桡足类的分布，以及该地区“岛屿质量效应”的程度，

• 发表时间: 2012
• 作者: Hidaka;K.;T. Nonomura;K. Komatsu;S. Itoh;I. Yasuda ;T. Ikeya and S. Kimura
• 通讯作者: T. Ikeya and S. Kimura

風が吹けばイワシは増えるか？―環境が資源変動に及ぼす影響を調べる―

如果刮风的话，沙丁鱼的数量会增加吗？

• 发表时间: 2013
• 作者: Ebuchi;N. and H. Abe;伊藤幸彦
• 通讯作者: 伊藤幸彦

黒潮親潮移行域における渦構造と生態系、水産海洋学会入門第4.5節

黑潮-亲潮过渡区的涡流结构和生态系统，渔业和海洋学会简介第4.5节

• 发表时间: 2014
• 作者: Ito;A;J. Watanabe;伊東祐二;伊藤幸彦
• 通讯作者: 伊藤幸彦

ウルップ海峡の乱流強度と水塊形成への影響,

乌鲁普海峡湍流强度及其对水团形成的影响，

• 发表时间: 2012
• 期刊: 月刊海洋
• 作者: 伊藤 幸彦，安田 一郎，八木 雅宏，長船 哲史，金子 仁，西岡 純，中塚 武，Y. N. Volkov， 田中 祐希;近田 俊輔
• 通讯作者: 近田 俊輔