摘要
2008年9月2009年8月,在广西龟石水库用刺网逐月采集大眼鳜（Siniperca kneri）标本688尾,摘取鳞片作为年龄鉴定的主要材料,摘取鳃盖骨和臀鳍第二鳍棘作为年龄鉴定的辅助材料,研究大眼鳜的年龄特征,并采用von Bertalanffy生长方程描述了大眼鳜的生长特性,为合理利用和保护库区大眼鳜资源提供科学依据和理论参考。结果表明,以鳞片作为大眼鳜年龄的鉴定材料较可靠,年轮特征显示为疏密型和断裂切割型,年轮主要形成时期在4 6月,年轮的形成与繁殖有关;年龄组成为0~4龄,0龄和1龄鱼占标本总数的93.32%;体长（L）与鳞径（R）的回归方程为：L=24.47R＋4.021 2（r=0.981 9,n=623）;体长（L）与体质量（W）的回归方程为：W=0.017 7×L3.087 6（r=0.979 1,n=688）;体长、体质量的von Bertalanffy生长方程为：Lt=59.04[l-e-0.2692（t＋0.251 9）],Wt=5 196.88[l-e-0.269 1（t＋0.263 8）]3.087 6。分析龟石水库大眼鳜资源现状,认为渔获物中低龄个体占绝对优势与库区无节制捕捞有关。为保护与合理利用库区大眼鳜资源,建议将库区大眼鳜的最小捕捞年龄定为3龄,捕捞规格定为990 g以上。
We evaluated the age and growth of bigeye mandarinfish（Siniperca kneri） in the Guishi reservoir Guangxi Province using scales,opercula,and anal-fin spines.We collected 688 specimens between September 2008 to August 2009.The interpretation of age based on scale readings was reliable.Annual rings were formed primarily by the pattern of sparseness-denseness and the cut of the scales.The pattern of sparseness-denseness was visible in the prezone region whereas the cut pattern was present on the rear-side region.Annuli formation took place primarily between April and June each year,likely related to the timing of reproduction.The estimated ages ranged between 0 and 4 years old,but were dominated by the younger age classes（age 0 and 1）.The body-length of specimens ranged from 11.25 to 40.50 cm,with the majority（70.49%） being 15–21 cm.Body weight ranged from 29.1 to 2 257.8 g,but most fish（62.12%） were between 100–300 g.The body length-scale radius relation-ship was L=24.47R＋4.021 2（r=0.981 9,n=623）.The body length-weight relationship was W=0.017 7×L3.087 6（r=0.979 1,n=688）.The b value was close to 3,therefore,S.kneri was considered to be isometric.The growth equations for body length and weight were Lt=59.04[l-e-0.269 2（t＋0.251 9）] and Wt=5 196.88[l-e-0.269 1（t＋0.263 8）]3.087 6,respectively.The inflexion age on the growth rate curve for weight was 3.93,and corresponded to a body-length of 39.89 cm and weight of 1 554.81g.Our data suggest that the bigeye mandarinfish population had been overex-ploited.To protect the population and allow for sustainable utilization,we suggest only fish greater than 990 g（age 3） should be harvested.
出处
《中国水产科学》
CAS
CSCD
北大核心
2012年第2期229-236,共8页
Journal of Fishery Sciences of China
基金
广东省科技计划项目(2008A020100003),广东省科技计划项目(2007A020300001)
广东省海洋与渔业局科技计划项目(200601G02)
关键词
大眼鳜
年龄
生长
龟石水库
Siniperca kneri
age
growth
Guishi Reservoir
