| 北太平洋亚热带海域大眼金枪鱼秋季摄食习性的初步研究 |
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| 引用本文： | 党莹超,陈屹林,戴小杰,李云凯,吴峰,刘攀.北太平洋亚热带海域大眼金枪鱼秋季摄食习性的初步研究[J].南方水产科学,2020,16(1):78-86. |
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| 作者姓名： | 党莹超 陈屹林 戴小杰 李云凯 吴峰 刘攀 |
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| 作者单位： | 上海海洋大学海洋科学学院,上海201306;上海海洋大学海洋科学学院,上海201306;远洋渔业协同创新中心/国家远洋渔业工程技术研究中心/大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306 |
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| 基金项目： | 浙江省2018年远洋渔业金枪鱼探捕项目(SZGXZS2018020);农业农村部远洋渔业观察员项目(08-25) |
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| 摘 要： | 中国金枪鱼延绳钓渔业观察员于2018年9-12月在北太平洋亚热带水域(150°W-164°W,30°N-37°N)采集了146尾大眼金枪鱼(Thunnus obesus)样品,并对其胃含物组成进行了研究。结果表明,大眼金枪鱼胃含物中共鉴别出36种饵料种类,隶属于28科,优势饵料为帆蜥鱼(Alepisaurus ferox)、发光柔鱼(Eucleoteuthis luminosa)、魣蜥鱼(Lestidium prolixum)和眶灯鱼(Diaphus sp.),其相对重要性指数百分比(IRI%)分别为25.65%、14.48%、7.56%和6.77%。大眼金枪鱼在叉长为100~110 cm范围内的摄食强度最高,在性腺成熟度Ⅲ期的摄食强度也最高,而Ⅴ期的摄食强度最低,此外,在150~250 m水层中的摄食强度较高。研究结果有助于提高对大眼金枪鱼生物学特征和摄食习性的认识,及进一步了解其在生态系统和食物网结构中所扮演的重要角色。
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| 关 键 词： | 大眼金枪鱼 摄食习性 北太平洋亚热带海域 |
A preliminary study on autumn feeding habits of bigeye tuna(Thunnus obesus) in subtropical waters of North Pacific |
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| DANG Yingchao,CHEN Yilin,DAI Xiaojie,LI Yunkai,WU Feng,LIU Pan.A preliminary study on autumn feeding habits of bigeye tuna(Thunnus obesus) in subtropical waters of North Pacific[J].South China Fisheries Science,2020,16(1):78-86. |
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| Authors: | DANG Yingchao CHEN Yilin DAI Xiaojie LI Yunkai WU Feng LIU Pan |
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| Institution: | (College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Collaborative Innovation Center for Distant-Water Fisheries/National Engineering Research Center for Distant-Water Fisheries/Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,China) |
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| Abstract: | We analyzed the stomach contents of 146 bigeye tuna(Thunnus obesus)collected in the subtropical waters of the North Pacific(150°W-164°W,30°N-37°N)from September to December in 2018 by the Chinese Longline Fisheries Observer Programme.A total of 36 bait species belonging to 28 families were identified.Alepisaurus ferox,Eucleoteuthis luminosa,Lestidium prolixum and Diaphus sp.were the dominant baits,whose relative importance index ratios(IRI%)were 25.65%,14.48%,7.56%and6.77%,respectively.The feeding intensity of bigeye tuna reached the maximum value in the range of 100-110 cm fork length and at Stage III of gonadal maturity,while reached the minimum value at Stage V.Moreover,higher feeding intensity was observed at water layer of 150-250 m.The results improve the understanding of the biological characteristics and feeding habits of bigeye tuna,in addition to its important role in the ecosystem and food network structure. |
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| Keywords: | Thunnus obesus Feeding habits Subtropical waters of North Pacific |
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