摘要
根据2012-2013年在辽东湾水域进行的6个航次的底拖网调查资料,采用体长频率分析法研究了该水域小黄鱼(Larimichtlys polyactis)的生长特征。结果表明,2012-2013年间共采集小黄鱼样本2 593尾,体长范围为40~210 mm,平均体长为115 mm,优势体长组为90~130 mm,占59.3%。体长与体质量的关系式为W=3×10^(-5)×L^(2.8424)。采用ELEFAN技术计算了小黄鱼的Von-Bertalanffy生长方程,其极限体长L_∞、生长系数K分别为260 mm和0.47。种群总死亡系数Z、自然死亡系数M和捕捞死亡系数F分别为2.31、0.41、1.90。与辽东湾及其邻近水域的历史数据相比,辽东湾水域小黄鱼的生物学特征与2000年前发生了较大变化,极限体长减小,生长速度加快,群体小型化和低龄化严重。2012-2013年辽东湾水域小黄鱼的资源开发率为0.823,其资源处于过度开发状态。
In order to understand the growth characteristics of small yellow croaker Larimichthys polyactis in the Liaodong Bay,the biological parameters were studied by the length frequency distribution method based on the bottom trawl investigation data from 2012 to 2013 during six cruises. The results showed that in 2012-2013,a total of 2 593 samples of small yellow croaker with body length ranging from 40 to 210 mm were collected in the Liaodong Bay with the average body length of 115 mm and the dominant group of 90-120 mm（ 46. 6%）. The relationship between body length and weight was expressed as W = 3 × 10^（-5）× L2. 842 4. The growth parameters of Von-Bertalanffy equation were estimated by ELEFAN,the growth parameter（ K） and asymptotic length（ L∞） were 0. 47 and 260 mm. The total mortality rate（ Z）,the natural mortality rate（ M）,the fishing mortality rate（ F） were 2. 31,0. 41 and 1. 88,respectively. Compared with the data from1963 to 2008 in the Liaodong Bay and its adjacent waters,the biological characteristics of small yellow croaker after 2000 were significantly different from those before 2000. The fish stock was in serious status characterized with asymptotic length reduction,increasing growth speed,miniaturization and lower age. The exploitation rate（ E） was 0. 823,indicating that small yellow croaker was overfished in the Liaodong Bay.
作者
刘修泽
郭栋
王爱勇
董婧
王小林
段妍
柴雨
LIU Xiu-ze,GUO Dong,WANG Ai-yong,DONG Jing,WANG Xiao-lin, DUAN Yan, CHAI Yu(Liaoning Key Laboratory of Marine Biological Resources and Ecology, Liaoning Ocean and Fishery Science Research Institute, Dalian 116023, Chin)
出处
《海洋渔业》
CSCD
北大核心
2018年第2期139-146,共8页
Marine Fisheries
基金
国家自然科学基金(31770458)
国家重点研发计划项目(2017YFC1404400)
辽宁省海洋与渔业科研项目(201711)
关键词
辽东湾
小黄鱼
生长特征
Liaodong Bay
Larimichthys polyactis
growth characteristics
