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

作     者：WANG Xuehui QIU Yongsong DU Feiyan LIN Zhaojin SUN Dianrong HUANG Shuolin 王雪辉;邱永松;杜飞雁;林昭进;孙典荣;黄硕琳

作者机构：South China Sea Fisheries Research InstituteChinese Academy of Fishery ScienceGuangzhou 510300ChinaShanghai 201306China College of Marine SciencesShanghai Ocean University Post-Doctor Research StationOcean CollegeXiamen UniversityXiamen 361005China 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2012年第30卷第1期

页      面：105-117页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 0707[理学-海洋科学] 09[农学] 0815[工学-水利工程] 

基　　金：Supported by the Chinese Ministry of Agriculture under the Investigation of Fishery Stocks in China Seas Program (No. 070404) the Special Project of the Social Commonwealth Research National Institute (Nos.2009TS08, 2010YD10) 

主　　题：commercial fish population parameters dynamic pool model stock status Beibu Gulf northern South China Sea 

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 2006~007 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.