Comparative studies on reproductive strategies and stock managements of variable and stable fish populations

可变和稳定鱼类种群繁殖策略和种群管理的比较研究

• 批准号: 14206023
• 负责人: WATANABE Yoshiro
• 金额: $ 33.78万
• 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 (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14206023/
• 关键词: fish resorces; natural fluctuation; clupeids; Pacific saury; life history strategy; management fish stock; 大変動; ニシン; キビナゴ; 初期減耗; 仔稚魚; 加入量変動; 耳石日輪; 再生産戦略; マサバ; 変動様式; 成長速度; 生残率

Latitudinal difference in population fluctuations in fish stocks in the southern subtropical and northern subarctic waters is distinct among 3 species of clupeid fishes, between 2 subpopulations of chub mackerel Scomber japonicus, and among 3 cohorts of Pacific saury Cololabis saira ; largely variable in the northern waters, relatively stable in the southern counterparts. This latitudinal difference is environmentally based in a species of chub mackerel of Pacific saury. In clupeid species, on the other hand, they are different in species and in reproductive strategies. Latitudinal difference in clupeid fishes are considered to be genetically based as well as environmentally induced. Through the course of evolution from the ancestor of clupeid fishes inhabiting the southern waters, herring have developed reproductive strategy that is adaptive to the variable environmental conditions in the subarctic waters.Iteroparity and indeterminate growth are reproductive strategies that are adaptive to variable environmental conditions in the northern waters. This bet-hedging strategies are understood to reduce the magnitude of recruitment variability by spawning multiple years and by allocating energy intake to reproduction as well as growth after the age-at-maturity. Nevertheless, recruitment variability is large in the species. If the species were semelparous and/or determinate in growth, it should have become extinct or it should not be capable of expanding to the northern waters. Recruitment variability, in other words, recruitment failure and occurrence of dominant year classes are inevitable in the northern waters. Adaptive management of the northern fishery stocks of these characteristics need to be adaptive to large variability in the recruitment. The yield-per-recruitment policy may be a choice for stock management of the variable northern species.

南部亚热带和北部亚亚亚北部水域的鱼群种群波动的纬度差异在3种棉花糖鱼类中与众不同，在2种chub鼠鲭鱼scomber japonicus的亚群中，以及3种太平洋萨里索利山地cololabis saira中的3个群体。在北部水域中，在南部的北部水域大大变化。这种纬度差异是在太平洋索里的chub鲭鱼种类的环境上。另一方面，在氯台物种中，它们的物种和生殖策略不同。氯固性鱼类的纬度差异被认为是基于遗传和环境诱导的。通过从居住在南部水域的木质鱼的祖先进化，鲱鱼已经开发出生殖策略，这些策略适应亚北极水域的可变环境条件。室内术和不确定的生长是生殖策略，这些策略适应北部水域的可变环境条件。理解这种围困策略是通过产卵多年并分配能量摄入以繁殖以及成熟年龄后的增长来降低招聘变异性的幅度。然而，该物种的招聘变异性很大。如果该物种是半理性和/或确定的生长，则应该已经灭绝，否则它不应能够扩展到北部水域。换句话说，招聘变异性在北部水域不可避免。这些特征的北部渔业库存的自适应管理需要适应招募的巨大变化。每次招募政策可能是可变北部物种的库存管理的选择。

项目成果

Spawning Ecology of Anadromous Wakasagi, Hypomesus nipponensis inhabiting the Hei River in Iwate

岩手县黑川溯河产卵的日本小鱼的产卵生态

• 发表时间: 2004
• 期刊: Japan Suisanzoshoku 51(2)
• 作者: Sasaki T;Saruwatari T;Watanabe S
• 通讯作者: Watanabe S

Latitudinal differences in growth an survival process of Pacific Saury larvae and juveniles.

秋刀鱼幼鱼生长和生存过程的纬度差异。

• 发表时间: 2004
• 期刊: Kaiyo Monthly 36(10)
• 作者: K.Akagi;Moriyasu K.;Watanabe Y.
• 通讯作者: Watanabe Y.

The impact of exotic brown and rainbow trout on native white-spotted charr in a Japanese stream : insight from convariations in population densities among and with pool/riffle units

外来褐鳟和虹鳟对日本溪流中本地白点红点鲑的影响：从池/浅滩单元之间以及与池/浅滩单元之间的种群密度变化的洞察

• 发表时间: 2004
• 期刊: J. Appl. Ecol. 41
• 作者: Morita K;Tsuboi J;Matsuda H
• 通讯作者: Matsuda H

Survey and assessment of marine mammals. (Geikensousyo No.9.)

海洋哺乳动物的调查和评估。

• 发表时间: 2002
• 作者: Shirakihara K;Okamura H;Kasamats;F;ed.;transl.
• 通讯作者: transl.

日本におけるスナメリの分布

日本江豚分布

• 发表时间: 2003
• 期刊: 月刊海洋 35
• 作者: Mogi N;Umegaki H;Hattori A;Maeda N;Miura H;Kuzuya M;Shimokata H;Ando F;Iguchi A;Watanabe M. et al.;白木原国雄
• 通讯作者: 白木原国雄