南海珊瑚礁周围过渡性水域主要鱼类食性与食物的关系

对路氏双髻鲨Sphyrna lewini、侧条真鲨Carcharhinus limbatus、大眼六鳃鲨Hexanchus vituius、灰六鳃鲨Hex-anchus griseus、及达尖犁头Rhynchobatus djiddensis、灰三齿鲨Triaenodon obesus、裸狐鲣Gymnosarda unicolor、扁舵鲣Auxis thazard、黄斑胡椒鲷Plectorhynchus flavomaculatus、密点胡椒鲷Plectorhynchus gaterinus、尖嘴Dasyatis zugei、星点Caranx stellatus、黑Caranx lugubrisr等13种南海主要珊瑚礁周围过渡性水域鱼类进行食性分析,根据其胃含物中饵料生物的重量组成和出现频率,分为4种食性类型。同时还分析了13种鱼的食物关系和营养级,为该海域渔场生态系食物网的研究提供基础资料。

Relationship Between Food and Food Habits for Main Fish Species in the Transitional Waters Around Coral Reefs in the South China Sea

The food habits of 13 main species of economic fishes, ie.Sphyrna lewini,Cardharhinus pleurotaenia,Hexanchus vituius,Hexanchus griseus,Rhynchobatus djiddensis,Triaenodon obesus,Gymnosarda uncolor,Auxis thazardle,Plectorhynchus flavomaculatus,Plectorhynchus punctaissmus,Dasyatis zugei,Caranx stellatus and Caranx lugubrisr,at transitional waters around the main coral reefs in the South China Sea are analyzed.Based on their stomach contents(which are in the weight composition of biological food and its appearance freguency),they may be devided into 4 kinds according to their food habits.Caranx lugubrisr and Caranx stellatus mainly feed on zooplankton and small fish species,and on benthos secondarily;Plectorhynchus flavomaculatus,Plectorhynchus punctaissmus Dasyatis zugei and Rhynchobatus djiddensis mainly feed on benthos and small fish species and on zooplandton secondarily;Gymnosarda uncolor and Auxis thazardle mainly feed small fish species and benthos and on zooplankton secondarily;Hexanchus vituius,Triaenodon obesus,Sphyrna lewini,Cardharhinus pleurotaenia and Hexanchus griseus mainly feed on fish and on benthos secondarily.The food relation and nutrient class of the 13 species are also analyzed.