| 2016年夏秋季南极布兰斯菲尔德海峡威氏棘冰鱼脂肪酸组成及其食性指示研究 |
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| 引用本文： | 吴睿婕,杨清源,朱国平.2016年夏秋季南极布兰斯菲尔德海峡威氏棘冰鱼脂肪酸组成及其食性指示研究[J].极地研究,2020,32(1):82-89. |
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| 作者姓名： | 吴睿婕 杨清源 朱国平 |
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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;上海海洋大学极地研究中心, 上海201306;上海海洋大学大洋渔业资源可持续开发教育部重点实验室极地海洋生态系统研究室, 上海201306;上海海洋大学海洋科学学院,上海201306;上海海洋大学极地研究中心, 上海201306;上海海洋大学大洋渔业资源可持续开发教育部重点实验室极地海洋生态系统研究室, 上海201306;国家远洋渔业工程技术研究中心, 上海210306 |
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| 基金项目： | 国家自然科学基金(41776185)、国家重点研发计划(2018YFC1406801)和自然资源部极地办协同创新平台建设项目资助 |
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| 摘 要： | 作为20世纪70年代末期底拖网渔业的主要捕捞对象以及近年来南极磷虾渔业的兼捕对象之一，威氏棘冰鱼(Chaenodraco wilsoni)在海洋捕食者与饵料生物之间的能量流动中起着重要的传递作用，而目前针对该鱼种的营养特性及其食性的研究却十分有限。为此，本研究分析了布兰斯菲尔德海峡威氏棘冰鱼肌肉组织中脂肪酸的含量及其组成，并进一步探讨特征脂肪酸对食性的指示。结果表明，体长范围为4.8—30.7 cm、质量范围为0.3—250.5 g的威氏棘冰鱼肌肉样本中共检测出29种脂肪酸，其中含量较高的脂肪酸包括C16:0，C18:0，C18:1n9c，C20:5n3(EPA)以及C22:6n3(DHA)，各类脂肪酸类型含量由高至低依次为多不饱和脂肪酸(PUFA)，饱和脂肪酸(SFA)以及单不饱和脂肪酸(MUFA)。威氏棘冰鱼多种特征脂肪酸含量与体长之间不具显著的相关关系，表明其摄食并不随着个体的生长而发生较大的变化。秋冬季威氏棘冰鱼呈现杂食性特性，主要摄食以硅藻为食的生物，如南极磷虾(Euphausia superba); 同时对底栖生物和海底碎屑也有一定的摄食，并会摄食一定量的桡足类生物。)
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| 关 键 词： | 威氏棘冰鱼 脂肪酸 食性 布兰斯菲尔德 |
| 收稿时间： | 2018-12-29 |
Fatty acid composition of Spiny Icefish (Chaenodraco Wilsoni) in the Bransfield Strait,Antarctic during summer-autumn 2016 and its implication to diet |
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| Wu Ruijie,Yang Qingyuan,Zhu Guoping.Fatty acid composition of Spiny Icefish (Chaenodraco Wilsoni) in the Bransfield Strait,Antarctic during summer-autumn 2016 and its implication to diet[J].Chinese Journal of Polar Research,2020,32(1):82-89. |
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| Authors: | Wu Ruijie Yang Qingyuan Zhu Guoping |
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| Institution: | 1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
2.Center for Polar Research, Shanghai Ocean University, Shanghai 201306, China;
3.Polar Marine Ecosystem Group, Key Laboratory of Sustainable Exploitation of Oeanic Fisheries resources, Ministry of Education, Shanghai 201306, China;
4.National Engineering research Center for Oceanic Fisheries, Shanghai 201306, China |
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| Abstract: | Spiny icefish (Chaenodraco wilsoni) plays an important role in the transfer of energy between marine predators and prey organisms, and is the target species of the demersal trawl fishery late 1970s and is one of bycatch species for the Antarctic krill fishery in recent years. However, information on its diet and nutritional characteristics are very limited. We analyzed the content and composition of fatty acids in muscle tissues of spiny icefish collected from the Bransfield Strait, and further explored the diet of spiny icefish using marker fatty acids. Standard lengths of fish samples ranged from 4.8 to 30.7 cm and wet weights ranged from 0.3 to 250.5 g. We found 29 fatty acids, of which C16:0, C18:0, C18:1 n9c, C20:5 n3 (EPA) and C22:6 n3 (DHA), were dominant; polyunsaturated fatty acid was the most abundant, followed by saturated fatty acids, and monounsaturated fatty acids were the least abundant. There was no statistically significant correlation between fish size and marker fatty acids, indicating that the diet of spiny icefish was not varied with ontogeny. Spiny icefish is omnivorous, and feed mainly on diatoms and Antarctic krill (Euphausia superba) during autumn and winter, some benthic organisms, copepods and seabed debris are fed by this species. |
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| Keywords: | spiny icefish fatty acid feeding habit Bransfield Strait |
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