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《Oceanologia et Limnologia Sinica》 2016-01
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POPULATION STRUCTURE AND BIODIVERSITY OF NEKTON IN LIUSHA BAY OF GUANGDONG, CHINA

SHEN Chun-Yan;YE Ning;SHEN Yu-Chun;CAO Fu-Jun;XU Ming;Fisheries College, Guangdong Ocean University;Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang;  
Nektonic organisms of Liusha Bay were captured and investigated for 16 times by stow net with double-stake warp. Results showed that all captured 161 species were belonging to 3 classes, 13 orders and 55 families. Among these, there were 9 orders, 43 families and 100 species of fish, 2 orders, 5 families and 32 species of shrimp, one order, 4 families and 20 species of crabs, 2 order, 3 families and 9 species of cephalopods. The most species of fish were captured in August, and the least in January. The most species of shrimp were captured in October, and the least in January. And there were the most species of crabs in the early August. In all 16 sampling, there were captured shrimp 60412 individuals with total weight of 1024 kg, captured fish 201339 individuals with total weight of 1344.7kg, captured crab 15115 individuals of total weight of 49.5kg, captured cephalopods 947 individuals with total weight 9.9 kg. The biomass of nektonic organisms reached peaks in the late April, the early May and late August. The lowest biomass of nekton emerged in late January and late December. Nektonic organisms lined in the prevalence order were as follows: Metapenaeus ensia, Metapenaeus moyebi, Sillago sihama, Metapenaeus affinis, Gerres lucidus, Trypauchen vagina, Metapenaeus intermedius, Dendrophysa russelli, Leiognathus brevirostris, Parapenaeopsis cultrirostris, Collichthys niveatus, Parapenaeopsis cornuta, Brachirus orientalis, Siganus oramin, Portunus argentatus. Richness values of nekton species showed great variations, but values of diversities, evenness and dominance varied little. Nekton population variation of Liusha Bay had close correlations with the water temperature. And when the temperature was 29—32°C, the biomass of nekton population reached the highest.
【Fund】: 广东省科技计划项目 2011B031100012号 2012A020602050号 2011B020314008号;; 广东省海洋渔业科技推广专项 A201201I02号
【CateGory Index】: S931.1
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