中国水产科学2025，Vol.32Issue(7)：889-900,12.DOI:10.12264/JFSC2025-0137
禁渔前后长江口棘头梅童鱼生活史参数和种群状态的变化
Changes in life history traits and stock status of Collichthys lucidus in the Yangtze River Estuary pre-and post-fishing ban
摘要
Abstract
The ten-year fishing ban policy in the Yangtze River provides a key research opportunity to reveal the adaptive response mechanisms of fish life history strategies to the lifting of fishing pressure.This study estimated the life history parameters of Collichthys lucidus using linear mixed-effects models,von Bertalanffy growth equation,and length-converted catch curve,based on samples collected from the resource survey of the Yangtze River Estuary in the pre-and post-fishing ban time periods(2017-2023).Spawning stock biomass per recruitment models were then applied to estimate the stock status during pre-ban and post-ban period.Finally,short-term changes were analyzed and summarized in the life history characteristics and stock status of C.lucidus after the fishing ban.The results showed that the mean body length of the C.lucidus in the Yangtze River estuary increased from 7.86 cm pre-fishing ban(2017-2020)to 9.22 cm post-ban(2021-2023),and the mean body mass increased from 10.12 g to 16.19 g.The results of the optimal linear mixed-effects model indicated that the estimated value of the growth parameter b for C.lucidus was 2.87,and that the estimated values of condition factor a for C.lucidus were 2.32×10-2-2.36×10-2 during 2017-2021,and then decreased to 2.14×10-2 in 2022 and 2023.Similarly,the growth rate of C.lucidus estimated based on von Bertalanffy's growth equation increased from 0.17(pre-fishing ban)to 0.26(post-fishing ban),and the infinite length of C.lucidus increased from 15.86 cm to 19.53 cm.The total mortality coefficient of C.lucidus in the Yangtze River Estuary increased from 0.66 pre-fishing ban to 0.80 post-ban,which was mainly due to the increase of natural mortality coefficient(0.52 to 0.78)after the fishing ban.Spawning stock biomass per recruitment for C.lucidus increased substantially from 0.45 pre-fishing ban to 14.66 post-ban.Before the fishing ban,its biological reference points(F20％,F40％)were 0.23 and 0.13 with corresponding SSBPR values of 0.24 and 0.48,while post the fishing ban these reference points changed to 0.99 and 0.47 with SSBPR increased to 3.08 and 6.16,respectively.Sensitivity analysis showed that the SSBPR model result were highly influenced by the estimation of natural mortality,and as the natural mortality coefficients increased,the corresponding SSBPR20％and SSBPR40％both decreased gradually.The results of this study are expected to provide an in-depth understanding of the resource dynamics of the C.lucidus during post-fishing ban period,and to provide support for the evaluation of the effectiveness of the fishing ban in the Yangtze River.关键词
长江禁渔/棘头梅童鱼/数据有限方法/种群动力学Key words
Yangtze River fishing ban/Collichthys lucidus/data-limited method/population dynamics分类
农业科技引用本文复制引用
郑琳琳,周雨霏,麻秋云,陈锦辉,魏广恩,贾泽华..禁渔前后长江口棘头梅童鱼生活史参数和种群状态的变化[J].中国水产科学,2025,32(7):889-900,12.基金项目
国家重点研发计划项目(2024YFD2400405) （2024YFD2400405）
上海市农委科技兴农技术创新项目(沪农科创字2022第2-1号). （沪农科创字2022第2-1号）
