| 东太平洋浅海长尾鲨母体和胚胎间痕量元素的迁移规律 |
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| 引用本文： | 李泽政,李云凯. 东太平洋浅海长尾鲨母体和胚胎间痕量元素的迁移规律[J]. 应用生态学报, 2021, 32(12): 4508-4514. DOI: 10.13287/j.1001-9332.202112.039 |
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| 作者姓名： | 李泽政 李云凯 |
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| 作者单位： | 1.上海海洋大学海洋科学学院, 上海 201306;2.农业农村部远洋与极地渔业创新重点实验室, 上海 200009;3.青岛海洋科学与技术试点国家实验室海洋渔业科学与食物产出过程功能实验室, 青岛 200071;4.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： | 国家自然科学基金项目(31872573)、上海市自然科学基金项目(17ZR1413000)、青岛海洋科学与技术海洋渔业科学与食物产出过程功能实验室开放课题项目(2017-1A03)和农业农村部远洋与极地渔业创新重点实验室开放课题项目(2019-3)资助 |
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| 摘 要： | 大洋中上层鲨鱼多为金枪鱼渔业的兼捕渔获,因其生长缓慢、繁殖力低等生活史特征,极易被过度捕捞,90％种类资源已近危.而作为长生命周期的顶级捕食者,鲨鱼体内某些过高的痕量元素含量不利于资源恢复.本研究选取10尾东太平洋雌性浅海长尾鲨(Alopias pelagicus)及对应的18尾胚胎,测定其肌肉和肝脏中锌(Zn)、铜(...
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| 关 键 词： | 东太平洋 浅海长尾鲨 胚胎 微量元素 卵胎生 |
| 收稿时间： | 2021-02-02 |
Patterns of maternal transfer of trace elements in the pelagic thresher shark (Alopias pelagicus) of the Eastern Pacific Ocean |
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| LI Ze-zheng,LI Yun-kai. Patterns of maternal transfer of trace elements in the pelagic thresher shark (Alopias pelagicus) of the Eastern Pacific Ocean[J]. The journal of applied ecology, 2021, 32(12): 4508-4514. DOI: 10.13287/j.1001-9332.202112.039 |
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| Authors: | LI Ze-zheng LI Yun-kai |
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| Affiliation: | 1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;2.Key Laboratory of Oceanic and Polar Fishe-ries, Ministry of Agriculture and Rural Affairs, Shanghai 200009, China;3.Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Qingdao 200071, Shandong, China;4.Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China |
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| Abstract: | Pelagic sharks are vulnerable to overfishing due to slow growth rates, late-at-maturity and low fecundity, 90% of which are Near Threatened with an elevated risk of extinction according to IUCN Red List Criteria. Trace elements can be accumulated by marine predators and may have detrimental effects on population dynamics. In this study, we analyzed the concentrations of 11 trace elements (Zn, Cu, Cr, Ni, Mn, Se, Co, Hg, Cd, Pb, and As) in muscle and liver tissues of 10 pregnant pelagic thresher sharks (Alopias pelagicus) and their 18 embryos. The results showed that four essential elements (Cu, Cr, Mn, and Se) were accumulated in both tissue types of embryos. Ni and Zn concentrations were higher in embryonic muscle than that in the liver. For nonessential elements, concentrations of As, Cd and Hg in both embryonic tissues were lower than those of their mothers. Though maternal and embryonic tissues had high levels of Hg, the Se/Hg molar ratios in both tissues of the embryo were above 1 with larger values in the embryos, indicating that Se played a protective role against Hg toxicity in embryonic tissues. Liver is the primary energy resource of embryo development. There was no correlation for element concentrations between embryonic and maternal liver tissues, indicating there is a regulatory mechanism to maintain the stability of element contents during maternal transfer in pelagic thresher shark. |
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| Keywords: | The Eastern Pacific Ocean Alopias pelagicus embryo trace element ovoviviparity |
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