廖东荣, 黎傲雪, 陈宁, 吕少梁, 王学锋. 湛江港皮氏叫姑鱼种群生物学特征和资源开发状态[J]. 南方水产科学. DOI: 10.12131/20230222
引用本文: 廖东荣, 黎傲雪, 陈宁, 吕少梁, 王学锋. 湛江港皮氏叫姑鱼种群生物学特征和资源开发状态[J]. 南方水产科学. DOI: 10.12131/20230222
LIAO Dongrong, LI Aoxue, CHEN Ning, LYU Shaoliang, WANG Xuefeng. Biological characteristics and resource exploitation status of Johnius belangerii population in Zhanjiang Bay[J]. South China Fisheries Science. DOI: 10.12131/20230222
Citation: LIAO Dongrong, LI Aoxue, CHEN Ning, LYU Shaoliang, WANG Xuefeng. Biological characteristics and resource exploitation status of Johnius belangerii population in Zhanjiang Bay[J]. South China Fisheries Science. DOI: 10.12131/20230222

湛江港皮氏叫姑鱼种群生物学特征和资源开发状态

Biological characteristics and resource exploitation status of Johnius belangerii population in Zhanjiang Bay

  • 摘要: 皮氏叫姑鱼 (Johnius belangerii) 是湛江港海域重要的渔业资源,其种群数量和分布对渔业生产和生态平衡具有重要影响。为探究湛江港皮氏叫姑鱼的生活史特征及其资源开发状态,根据2016—2021年湛江港海域底拖网调查数据,使用ELEFAN I、Pauly经验公式、长度转换捕获曲线法等方法估算了皮氏叫姑鱼的生长、死亡参数,并根据实际种群分析 (Virtual population analysis, VPA)、Beverton-Holt动态综合模型评估了该渔业资源的开发状态。结果表明,湛江港海域皮氏叫姑鱼体长介于27.03~182.00 mm,体质量介于0.19~137.34 g。生长方程的极限体长 (L) 为185.85 mm,生长系数 (K) 为0.61,理论生长年龄 (t0) 为 −0.27。总死亡系数 (Z)、自然死亡系数 (M)和捕捞死亡系数 (F) 分别为2.40、0.75和1.65。湛江港皮氏叫姑鱼首次捕捞体长 (83.74 mm)远小于最适开捕体长 (131.95 mm),捕捞对象多为幼鱼和补充群体,具有小型化趋势。湛江港皮氏叫姑鱼开发率 (E) 为0.69,高于最大可持续开发率 (Emax=0.63),处于过度捕捞状态。研究揭示了皮氏叫姑鱼的生活史特征,可为其资源的可持续利用和科学管理提供参考依据。

     

    Abstract: Johnius belangerii is an important fishery resource in the Zhanjiang Bay, and its population and distribution have a significant impact on fishery production and ecological balance. We investigated the life history traits and exploitation status of J. belangerii in the Zhanjiang Bay based on data from bottom trawl surveys conducted during 2016–2021. ELEFAN I, Pauly's empirical formula and length conversion capture curves were used to estimate growth parameters and mortality rates. Virtual population analysis (VPA) and Beverton-Holt model were used to assess the exploitation status. The results indicate that the body length of J. belangerii ranged from 27.03 mm to 182.00 mm, with mass ranging from 0.19 g to 137.34 g. The estimated asymptotic length (L) was 185.85 mm, the growth coefficient (K) was 0.61, and the theoretical age at growth (t0) was –0.27. The total mortality coefficient (Z), natural mortality coefficient (M) and fishing mortality coefficient (F) are 2.40, 0.75, and 1.65, respectively. The current catchable size (83.74 mm) was significantly smaller than the optimal size (131.95 mm), suggesting a large composition of juveniles and a trend towards population miniaturization. The exploitation rate (E) of 0.69 exceeded the maximum sustainable rate (Emax=0.63), indicating a state of overfishing and extensive exploitation. The study reveals the life history traits of J. belangerii and provides insights into its sustainable management and conservation.

     

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