北部湾春季多齿蛇鲻生物学特征及其年际变化  

Biological Characteristics and Inter-Annual Changes of Saurida tumbil in Spring in the Beibu Gulf, South China Sea

作　　者：邓裕坚 易木荣[1,2] 李波 刘思杓[1] 邱康文 沈春燕 何雄波[1] 颜云榕 DENG Yujian;YI Murong;LI Bo;LIU Sibiao;QIU Kangwen;SHEN Chunyan;HE Xiongbo;YAN Yunrong(College of Fisheries,Guangdong Ocean University,Zhanjiang 524088;Marine Resources Big Data Center of South China Sea,Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang),Zhanjiang 524013;Guangdong Provincial Engineering and Technology Research Center of Far Sea Fisheries Management and Fishing of South China Sea,Zhanjiang 524088;Center of Marine Fisheries Information Technology,Shenzhen Institute of Guangdong Ocean University,Shenzhen 518120)

机构地区：[1]广东海洋大学水产学院,湛江524088 [2]南方海洋科学与工程广东省实验室(湛江)南海资源大数据中心,湛江524013 [3]广东省南海深远海渔业管理与捕捞工程技术研究中心,湛江524088 [4]广东海洋大学深圳研究院海洋渔业信息化技术中心,深圳518120

出　　处：《渔业科学进展》2021年第2期36-44,共9页Progress in Fishery Sciences

基　　金：国家重点研发计划项目(2018YFD0900905);南方海洋科学与工程广东省实验室(湛江)资助项目(ZJW-2019-08);广东省科技计划项目(2018B030320006)共同资助。

摘　　要：根据北部湾渔港采样及海上调查生物学测定与数据分析,研究了北部湾多齿蛇鲻(Saurida tumbil)春季生物学特征及其年际变化。结果显示,2008~2018年春季,多齿蛇鲻个体呈小型化趋势,各年度平均体长范围为15.8~16.9 cm,平均体质量范围为48.8~77.5 g,2018年的平均体长和平均体质量比2008年分别降低了6.5%和34.5%。体长–体质量关系式中的异速生长参数b的范围为3.03~3.42,表明春季群体主要呈正异速生长状态(b>3)。性成熟体长年际变化分析表明,北部湾多齿蛇鲻存在性成熟提前的现象,雌性群体50%性成熟体长从2008年(19.0cm)至2018年(16.6cm)整体呈减小趋势,10年间减小比例为12.6%,其中,2011~2015年海上采样的样品对比显示,50%性成熟体长减小比例为3.8%。2008~2018年北部湾多齿蛇鲻的肥满度整体呈下降趋势,均值变化范围为1.09~1.29,渔港采样样品和海上采样样品的肥满度年际变化皆呈下降趋势。Using data from the spring fishing port samples and bottom trawl surveys in the Beibu Gulf, the biological characteristics and inter-annual changes of Saurida tumbil were investigated. The population structure of S. tumbil in the Beibu Gulf had a miniaturization trend-the average standard length(SL) and body weight(BW) decreased from 2008 to 2018, with ranges of 15.8~16.9 cm and 48.8~77.5 g, respectively. There were also temporal variations in SL and BW;the average values decreased by 6.5% and 34.5% from 2008 to 2018, respectively. The range of the allometric parameter b was 3.03~3.42, indicating that S. tumbil had positive allometric growth(b>3) in the Beibu Gulf in spring. Analysis of the inter-annual change in length at 50% maturity(L50) in females showed that the S. tumbil population maturated before the L50, decreasing 12.6% from 2008(19.0 cm) to 2018(16.6 cm). Compared to 2011(18.6 cm), the 2015 female L50 reduced by 3.8%(17.9 cm). Fatness also declined from 2008 to 2018(range: 1.09~1.29), as evidenced by consistent downward trends in the fatness samples from both fishing methods. However, fatness had an overall increasing trend with increasing SL.

关 键 词：北部湾 多齿蛇鲻 生物学特征 50%性成熟体长 肥满度 年际变化 

分 类 号：S931.1[农业科学—渔业资源]