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Population parameters and dynamic pool models of commercial fishes in the Beibu Gulf, northern South China Sea

文献类型： 外文期刊

作者： Wang Xuehui 1 ; Qiu Yongsong 1 ; Du Feiyan 1 ; Lin Zhaojin 1 ; Sun Dianrong 1 ; Huang Shuolin 2 ;

作者机构： 1.Chinese Acad Fishery Sci, S China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China

2.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China

3.Xiamen Univ, Postdoctor Res Stn, Ocean Coll, Xiamen 361005, Peoples R China

关键词： commercial fish;population parameters;dynamic pool model;stock status;Beibu Gulf;northern South China Sea

期刊名称：CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.068； 五年影响因子：0.983 ）

ISSN： 0254-4059

年卷期： 2012 年 30 卷 1 期

页码：

收录情况： SCI

摘要： Length-frequency data of eight commercial fish species in the Beibu Gulf (Golf of Tonkin), northern South China Sea, were collected during 2006-2007. Length-weight relationships and growth and mortality parameters were analyzed using FiSAT II software. Five species had isometric growth, two species had negative allometric growth, and one species had positive allometric growth. Overall, the exploitation rates of the eight species were lower in 2006-2007 than in 1997-1999: for four species (Saurida tumbil, Saurida undosquamis, Argyrosomus macrocephalus, and Nemipterus virgatus) it was lower in 2006-2007 than in 1997-1999, for two species (Parargyrops edita and Trichiurus haumela) it remained the same, and for the other two species (Trachurus japonicus and Decapterus maruadsi) it was higher in 2006-2007 than in 1997-1999. The exploitation rates might have declined because of the decline in fishing intensity caused by high crude oil prices. The optimum exploitation rate, estimated using Beverton-Holt dynamic pool models, indicated that although fishes in the Beibu Gulf could sustain high exploitation rates, the under-size fishes at first capture resulted in low yields. To increase the yield per recruitment, it is more effective to increase the size at first capture than to control fishing effort.

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