| 海蜇(Rhopilema esculentum)浮游幼体对褐牙鲆(Paralichthys olivaceus)卵和初孵仔鱼捕食的比较研究 |
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| 引用本文： | 曹 亮,刘金虎,于 鑫,南 鸥,窦硕增.海蜇(Rhopilema esculentum)浮游幼体对褐牙鲆(Paralichthys olivaceus)卵和初孵仔鱼捕食的比较研究[J].海洋与湖沼,2012,43(3):513-519. |
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| 作者姓名： | 曹 亮 刘金虎 于 鑫 南 鸥 窦硕增 |
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| 作者单位： | 1. 中国科学院海洋研究所海洋生态与环境科学重点实验室,青岛,266071
2. 中国科学院海洋研究所海洋生态与环境科学重点实验室,青岛266071 中国科学院研究生院,北京100049 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目资助, 2011CB403605 号; 国家自然科学基金委员会“创新研究群体科学基金”资助, 41121064 号; 中国科学院知识创新工程重要方向项目群项目资助, KZCX2-YW-Q07-02 号 |
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| 摘 要： | 利用实验生态学方法研究不同个体大小的海蜇浮游幼体平均伞径(2.5±0.1),(4.1±0.2),(11.7±0.5),(21.1±0.6)mm]对不同密度(10,30,50,80ind/L)的褐牙鲆卵卵径(0.92±0.01)mm]和初孵仔鱼全长(3.01±0.08)mm]的捕食率,解析海蜇浮游幼体对初孵仔鱼的捕食率随捕食时间(0.5,1,2,3,4,5h)的变化特征。结果表明,各个体组海蜇浮游幼体对卵的捕食率均显著低于对仔鱼的捕食率;它们对卵的捕食率与卵密度和海蜇个体大小的关系不显著,但对仔鱼的捕食率随海蜇个体大小及仔鱼密度的增大而显著升高;伞径21.1mm的个体对仔鱼的捕食率在开始捕食后1h时达到最大值17.3ind/(predator.h)],此后随捕食时间的延长而逐渐下降。在自然水域中,如果二者发生时空上的匹配关系,海蜇浮游幼体对仔鱼的捕食可能影响褐牙鲆的早期存活及其资源补充量的变动。
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| 关 键 词： | 海蜇 褐牙鲆 卵仔鱼密度 个体大小 捕食时间 捕食率 |
| 收稿时间： | 2011/12/31 0:00:00 |
| 修稿时间： | 2012/2/28 0:00:00 |
PREDATION OF JUVENILE JELLYFISH RHOPILEMA ESCULENTUM ON FLOUNDER PARALICHTHYS OLIVACEUS EGGS AND NEWLY-HATCHED LARVAE |
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| CAO Liang,LIU Jin-Hu,YU Xin,NAN Ou and DOU Shuo-Zeng.PREDATION OF JUVENILE JELLYFISH RHOPILEMA ESCULENTUM ON FLOUNDER PARALICHTHYS OLIVACEUS EGGS AND NEWLY-HATCHED LARVAE[J].Oceanologia Et Limnologia Sinica,2012,43(3):513-519. |
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| Authors: | CAO Liang LIU Jin-Hu YU Xin NAN Ou and DOU Shuo-Zeng |
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| Institution: | Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;Graduate School, Chinese Academy of Sciences;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;Graduate School, Chinese Academy of Sciences;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;Graduate School, Chinese Academy of Sciences;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences |
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| Abstract: | This study investigated the predation of different-sized juvenile jellyfish Rhopilema esculentum(2.5±0.1), (4.1±0.2), (11.7±0.5), and (21.1±0.6)mm in umbrella diameter] on flounder Paralichthys olivaceus eggs (0.92±0.01)mm in diameter] and newly-hatched larvae (3.01±0.08)mm in total length] at different prey densities (10, 30, 50, 80ind/L). In addition, the predation rates of juvenile jellyfish (21.1±0.6)mm in umbrella diameter] on newly-hatched larvae at different predation duration (0.5, 1, 2, 3, 4, 5h) were examined. In all size-groups, the predation rates on eggs were significantly lower than that on newly-hatched larvae at all prey densities. Neither egg density nor jellyfish size had significant effect on the predation rates. Predation rates on larvae increased significantly with the increase of jellyfish size and larval density. Predation rates on larvae by the juvenile jellyfish (21.1mm in diameter) reached a maximum of 17.3ind/(predator·h) at 1h, and then dropped gradually as the predation duration was prolonged. It is assumed that predation on eggs and larvae by juvenile jellyfish could influence the embryonic and larval survival of the flounder if the predators and prey were spatially and temporally matched in nature, which could subsequently affect the recruitment or the population dynamics of the flounder populations. |
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| Keywords: | Rhopilema esculentum Paralichthys olivaceus Egg and larval density Jellyfish size Predation duration Predation rate |
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