Stock structure of Japanese anchovy
日本鳀鱼种群结构
基本信息
- 批准号:12660161
- 负责人:
- 金额:$ 1.73万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2001
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. Reproductive ecology was compared between 4 sub-populations that inhabit off Japan. The spawning activity was commonly controlled by the water temperature higher than 15℃ for anchovies in the coastal waters in Sagami Bay, Wakasa Bay and Osaka Bay. Within this temperature range the spawning period was varied between localities depending on nutritional conditions reflecting food availability. Maturity body lengths differed among the three bays. The anchovy in the offshore east of Honshu spawned under the temperature environment much lower than 15℃. Moreover, the offshore anchovy matured at 10cm in body length, later than that for the coastal anchovy. Fecundity and spawning frequency were positively correlated with temperature for anchovies in every locality. However, the anchovy offshore east of Honshu showed spawning ability equivalent to the coastal anchovy in the lower temperature environment. Anchovies in the different localities exhibited different spawning patterns in accordance with their environment.2. Otolith microstructure was examined with a scanning electron microscope for 6 sites samples from Kyushu to Hokkaido. The early stage growth determined by daily growth rings from hatching to 60 days was different among the sampling sites. The growth rate tended to be higher in the south and lower in the north. In addition, external morphology was examined with 12 body parts measured. The morphological variation tended to increase with geographical distance. This suggests the existence of local populations that have different hatching and distribution areas.3. Stable isotope ratios of delta-15-N delta 13-C was compared between anchovies from Wakasa Bay, Japan Sea and off the Pacific coast of eastern Honshu. The values of delta-15-N and delta-13-C ranged differently between two areas as a whole, though they overlapped and varied among samples considerably. The great variation seemed to make the use of the stable isotope ratio difficult for stock identification.
1.对居住在日本近海的4个亚种群的生殖生态进行了比较。相模湾、和歌湾和大阪湾近岸水域凤尾鱼的产卵活动一般受高于15℃的水温控制。在这一温度范围内,产卵期因地而异,这取决于反映食物供应情况的营养条件。成熟体长在三个海湾之间存在差异。本州以东近海的凤尾鱼是在远低于15℃的温度环境下产卵的。此外,近海凤尾鱼的体长在10 cm左右成熟,晚于沿海凤尾鱼。各地凤尾鱼的产卵量和产卵频率与温度呈正相关。而本州以东近海的凤尾鱼在较低温度环境下表现出与沿海凤尾鱼相当的产卵能力。不同产地的凤尾鱼因其所处环境的不同,表现出不同的产卵规律。用扫描电子显微镜观察了从九州到北海道的6个地点的耳石显微结构。从孵化到60日龄的日生长轮所确定的早期生长在不同的采样点是不同的。增速呈现南高北低的趋势。此外,还对12个身体部位进行了外部形态观察。形态变异随地理距离的增加而增大。这表明当地种群的存在具有不同的孵化和分布区域。比较了日本和歌沙湾和本州东部太平洋沿岸的凤尾鱼的Delta-15-N Delta 13-C的稳定同位素比值。三角洲-15-N和三角洲-13-C的值在两个地区之间作为一个整体是不同的,尽管它们在样品之间重叠和变化很大。这种巨大的变化似乎使得利用稳定的同位素比率进行种群鉴定变得困难。
项目成果
期刊论文数量(15)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Tetsuichiro FUNAMOTO: "Geographical variation in reproductive pattern of Japanese anchovy Engraulis japonicus"Fisheries Science. (in press).
Tetsuichiro FUNAMOTO:“日本鳀鱼 Engraulis japonicus 繁殖模式的地理变异”渔业科学。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Tetsuichiro Funamoto: "Maturation and spawning of Japanese anchovy"Nippon Suisan Gakkaishi. 67. 1129-1130 (2001)
船本哲一郎:“日本凤尾鱼的成熟和产卵”日本水产学会。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Ichiro AOKI: "Dispersal of larvae and juveniles of Japanese anchovy in the Kuroshio Extension and Kuroshio-Oyashio transition regions, western North Pacific Ocean"Fisheries Research. 49. 155-164 (2000)
青木一郎:“北太平洋西部黑潮延伸区和黑潮-亲潮过渡区日本凤尾鱼幼鱼和幼鱼的扩散”渔业研究。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Akinori TAKASUKA: "Growth rates of larval stage of Japanese anchovy Engraulis japonicus and environmental factors in the Kuroshio Extension and Kuroshio-Oyashio transition regions, western North Pacific Ocean"Fisheries Science. (in press).
Akinori TAKASUKA:“北太平洋西部黑潮延伸区和黑潮-亲潮过渡区日本鳀鱼幼体阶段的生长速率和环境因素”渔业科学。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
船本鉄一郎: "カタクチイワシの成熟・産卵"日本水産学会誌. 67・6. 1129-1130 (2001)
Tetsuichiro Funamoto:“凤尾鱼的成熟和产卵”日本水产学会杂志 67・6(2001)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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AOKI Ichiro其他文献
AOKI Ichiro的其他文献
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