中国水产科学2016，Vol.23Issue(2)：436-446,11.DOI:10.3724/SP.J.1118.2016.15181
三种大型钵水母幼体对牙鲆和许氏平鲉仔稚鱼的捕食选择性
Predation of three juvenile scyphomedusa species toParalichthys olivaceus and Sebastes schlegelilarvae
摘要
Abstract
Jellyfish bloom has had numerous deleterious effects in the marine ecosystem worldwide in past decades. In particular, jellyfish bloom impedes the recovery of fish stocks by preying on fish eggs and larvae, and competing strongly for food with fish. Recently, studies have focused on the predatory relationship between fish and jellyfish. However, the species involved vary among different jellyfish-bloom areas.Aurelia aurita,Rhopilema esculentum and Nemopilema nomuraiare, the three common jellyfish species along Chinese coastal seas, of whichA. auritais a cos-mopolitan jellyfish species, and the other two species were indigenous. To the best of our knowledge, the predatory ability of different jellyfish species has not been estimated, as well as the predation of jellyfish on larger fish larvae (more than 10 mm). In this study, the predation of three common jellyfish species (A. aurita,R. esculentum andN. no-murai), as 4-cm medusae, in Chinese coastal seas on fish larvae ofParalichthys olivaceus and Sebastes schlegeli, was studied using the clearance method. All three jellyfish species could prey on fish larvae, and their predatory abilities decreased as the fish grew. The ranges ofA. auritato P. olivaceus and S. schlegeli were not bigger than 15 mm and 20 mm, respectively; the ranges ofR. esculentumto P. olivaceus and S. schlegeli were not bigger than 20 mm and 30 mm, respectively; and the ranges ofN. nomuraito S. schlegeli were not bigger 30 mm (the experiment ofN. nomurai toP. olivaceuswas not done). Clearance rates were similar between the different prey concentrations, and metamorphosis of P. olivaceushelped to avoid predation. The clearance rates of different jellyfish species mainly depended on their vital-ity, though body structure and toxicity of jellyfish were also important factors. Accordingly,R. esculentum had the highest vitality and predatory ability toward fish larvae, followed byN. nomurai andA. aurita. The results provide theoretical evidence of the relationship between fish and jellyfish, and will further the study of the recruitment mecha-nisms of natural fish resources in Chinese seas.关键词
海月水母/海蜇/沙海蜇/仔稚鱼/清除率/捕食选择性Key words
Aurelia aurita/Rhopilema esculentum/Nemopilema nomurai/larvae/clearance rate/predacious selection分类
农业科技引用本文复制引用
刘春胜,庄志猛,陈四清,燕敬平,刘长琳,陈昭廷..三种大型钵水母幼体对牙鲆和许氏平鲉仔稚鱼的捕食选择性[J].中国水产科学,2016,23(2):436-446,11.基金项目
国家973项目(2011CB403602) （2011CB403602）
中国水产科学研究院黄海水产研究所基本科研业务费项目(20603022015011) （20603022015011）
农业部北方海水增养殖重点实验室开放课题项目(2014-MSENC-KF-01) （2014-MSENC-KF-01）
