文章摘要
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 the Beibu Gulf, South China Sea in spring
投稿时间:2019-12-12  修订日期:2020-05-12
DOI:
中文关键词: 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
英文关键词: Beibu Gulf  Saurida tumbil  biological characteristics  length at 50% maturity  fatness  in-ter-annual change
基金项目: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)
作者单位E-mail
邓裕坚 广东海洋大学水产学院 yujiandeng@126.com 
易木荣 广东海洋大学水产学院  
李波 广东海洋大学水产学院  
刘思杓 广东海洋大学水产学院  
邱康文 广东海洋大学水产学院  
沈春燕 广东海洋大学水产学院 广东省南海深远海渔业管理与捕捞工程技术研究中心  
何雄波 广东海洋大学水产学院  
颜云榕 广东海洋大学水产学院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广东省南海深远海渔业管理与捕捞工程技术研究中心
广东海洋大学深圳研究院海洋渔业信息化技术中心
 
tuna_ps@126.com 
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中文摘要:
      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。结果表明,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15.8-16.9cm,平均体质量范围为48.8-77.5g,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%,其中海上采样部分,2015和2011年之间的样品对比,50%性成熟体长减小比例为3.8%;2008-2018年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。
英文摘要:
      Based on the data from fishing port sampling and bottom trawl surveys in the Beibu Gulf in spring, the biological characteristics and inter-annual changes of Saurida tumbil were re-searched. The results showed that the population structure of S. tumbil in the Beibu Gulf had performed a miniaturization trend as the average standard length (SL) and body weight (BW) had decreased from 2008 to 2018, with the ranges of 15.8-16.9 cm and 48.8-77.5 g, respectively. Temporal variations were found in SL and BW with the average values decreasing 6.5% and 34.5% from 2008 to 2018, respectively. The range of allometric parameter b was 3.03-3.42 which indicated that S. tumbil displayed positive allometric growth (b>3) in the Beibu Gulf in spring. Analysis of inter-annual change in the length at 50% maturity (L50) of the female showed that the population of S. tumbil had maturated in advance than before with the L50 decreasing 12.6% from 2008 (19.0 cm) to 2018 (16.6 cm ). Comparing with which in 2011 (18.6 cm), the L50 of the female reduced by 3.8% in 2015 (17.9 cm). The fatness showed a declining trend from 2008 to 2018 with a range of 1.09-1.29. Meanwhile the fatness of samples from both fishing methods showed a downward trend, too. On the other hand, the fatness showed an overall increase trend with the increase of SL.
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