Environmental preferences of bigeye tuna, Thunnus obesus, in the Indian Ocean: an application to a longline fishery

被引：0
|
作者：
Liming Song
Ji Zhou
Yingqi Zhou
Tom Nishida
Wenxin Jiang
Jiaqiao Wang
机构：
[1] Shanghai Ocean University,The Key Laboratory of Shanghai Education Commission for Oceanic Fishery Resources Exploitation, The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences
[2] Fisheries Research Agency (FRA),National Research Institute of Far Seas Fisheries
来源：
Environmental Biology of Fishes | 2009年 / 85卷
关键词：
Bigeye tuna; Environmental preferences; Longline; Indian Ocean;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A survey of the fishing grounds for bigeye tuna, Thunnus obesus, in the Indian Ocean was carried out for a better understanding of the environmental preferences of bigeye tuna in a longline fishery. Catch rates of bigeye tuna were analyzed with respect to the ranges of depth, temperature, salinity, chlorophyll-a, and dissolved oxygen. The optimum capture depth, water temperature, and dissolved oxygen range of bigeye tuna were identified as 240.0 m to 279.9 m, 12.0°C to 13.9°C, and 2.00 mg·L−1 to 2.99 mg·L−1, respectively, in the study area of Indian Ocean. Neither salinity nor chlorophyll-a had a detectable effect on the vertical distribution of the adult bigeye tuna. The dissolved oxygen is the principal factor limiting the vertical distribution of bigeye tuna.
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页码：153 / 171
页数：18
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