欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

华南地区外来鱼类革胡子鲶的年龄与生长

朱赟杰1,2,顾党恩1,韦慧1,牟希东1,罗渡1,徐猛1,罗建仁1,胡隐昌1*
  

  1. 1中国水产科学研究院珠江水产研究所, 农业部热带亚热带水产资源利用与养殖重点实验室, 广州 510380; 2上海海洋大学水产与生命学院, 上海 201306)
  • 出版日期:2016-06-10 发布日期:2016-06-10

Age structure and growth characteristics of exotic fish Clarias gariepinus (Burchell, 1822) in south China.

ZHU Yun-jie1,2, GU Dang-en1, WEI Hui1, MU Xi-dong1, LUO Du1, XU Meng1, LUO Jian-ren1, HU Yin-chang1*#br#   

  1. (1 Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Guangzhou 510380, China; 2 College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China).
  • Online:2016-06-10 Published:2016-06-10

摘要:

以2011年8月—2015年6月在华南地区主要水系采集的223尾革胡子鲶(Clarias gariepinus)为研究对象,以矢耳石磨片为主要年龄鉴定材料,对华南地区革胡子鲶种群的年龄结构和生长特征进行研究。结果表明:采集样本由1~3龄3个龄组组成,以1龄鱼为主,占样本总量的60.19%;雌、雄鱼体长与体重关系式分别为:W=5.763×10-5L2.737(n=87,R2=0.989)、W=9.239×10-5L2.631(n=122,R2=0.942),均为等速生长类型。选用Von Bertalanffy生长方程描述其生长,雌、雄鱼体长生长方程分别为:Lt=455.566(1-1877.112e-8.036t)、Lt=475.187(1-1.48e-0.908t)。体重生长方程分别为:Wt=1089.19(1-1877.112e-8.036t)2.737、Wt=1019.66(1-1.48e-0.908t)2.631。雌、雄鱼生长拐点年龄分别为1.07和1.64龄,拐点年龄处雌、雄鱼的体长分别为297.75和316.79 mm,体重分别为340.08和350.88 g;革胡子鲶野生种群的生长速度随着年龄增长而逐年降低,且性成熟年龄较低的个体生长速度大于性成熟年龄较高的个体,种群年龄结构简单,生产量大,种群数量呈上升趋势。
 

关键词: 景观变化, 东寨港, 红树林, 斑块分析

Abstract: To determine the age structure and growth characteristics of Clarias gariepinus, sagitta ray sections, body length and weight were examined using 223 specimens collected in South China during August 2011 and June 2015. These specimens were comprised of 3 age groups ranging from age 1 to age 3. Additionally, the dominated age was age 1, accounting for 60.19% of the total specimens. The formulas of the relationship between standard body length (L) and total weight (W) for females and males were W=5.763×10-5 L2.737 (n=87, R2=0.989),W=9.239×10-5L2.631 (n=122, R2=0.942), respectively, which showed that the growth of C. gariepinus was nearly isometric. The growth pattern of C. gariepinus was formulated by Von Bertalanffy growth function as follow: Lt=455.566(1-1877.112e-8.036t), Wt=1089.19(1-1877.112e-8.036t)2.737 for females and Lt=475.187(1-1.48e-0.908t), Wt=1019.66(1-1.48e-0.908t2.631  for males. The growth inflection points for females and males were 1.07 and 1.64 respectively when the corresponding standard body lengths on the growth infection points were 297.75 mm for females and 316.79 mm for males, and the corresponding total weights were 340.08 g for females and 350.88 g for males. Analysis also showed that the growth rate became lower with the increasing age, and the younger matured individuals grow faster than the older ones. Our results suggested that C. gariepinus has a large population size with single age structure in South China. Moreover, C. gariepinus population is in the rapid growth period, and is likely to burst into a sudden growth in the South China.

Key words: landscape change, Dongzhai Harbor, mangrove, patch-based analysis.