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生态学杂志 ›› 2011, Vol. 30 ›› Issue (03): 539-546.

• 研究报告 • 上一篇    下一篇

北盘江光唇裂腹鱼年龄结构、生长特征和生活史类型

肖海,代应贵   

  1. 贵州大学动物科学学院| 贵阳 550025
  • 出版日期:2011-03-08 发布日期:2011-03-08

Age structure, growth and life-history pattern of Schizothorax lissolabiatus in Beipan River.

XIAO Hai|DAI Ying-gui**   

  1. College of Animal Sciences, Guizhou University, Guiyang 550025, |China
  • Online:2011-03-08 Published:2011-03-08

摘要: 光唇裂腹鱼(Schizothorax lissolabiatus)主要分布于珠江水系南北盘江、元江、澜沧江和怒江等。以2008-2009年在北盘江采集的261尾光唇裂腹鱼为材料,研究了光唇裂腹鱼的年龄和生长特征。选用鳞片作为年龄鉴定的主要材料,并结合主鳃盖骨、匙骨、背鳍条等材料,对光唇裂腹鱼个体进行了年龄鉴定。结果表明:这4种材料年龄鉴定结果趋于一致,吻合性高。光唇裂腹鱼体长与鳞径的最佳函数关系为线性函数L=20.202R+65.726,体长与体重的最佳拟合方程呈幂函数关系W=4×10-5L2.8208。Von Bertalanffy方程、Logistic方程、Gompertz方程均为光唇裂腹鱼拟合性较好的生长方程,并以Von Bertalanffy方程的拟合度最高;光唇裂腹鱼Von Bertalanffy生长方程为:Lt=475.51[1-e-0.138 (t+1.1397)],Wt=1424.93[1-e-0.138(t+1.1397)2.8208;体重生长拐点为637龄。1~4龄为光唇裂腹鱼生长的快速阶段,而5龄以上个体的生长速度明显降低。根据r-选择和k-选择的典型特征以及渐近体长(L)、渐近体重(W)、生长系数(K)、瞬时自然死亡率(M)、初次性成熟年龄(Tm)、最大年龄(Tmax)、性腺指数(GI)和种群繁殖力系数(PF)等8个参数值,推断光唇裂腹鱼为偏向r-选择物种。

关键词: 蜥蜴科, 山地麻蜥, 两性异形, 食性, 食物, 生态位宽度, 生态位重叠度

Abstract: Schizothorax lissolabiatus is distributed in the Nanpan River, the Beipan River, the Yuanjiang River, the Lancang River, and the Nujiang River. A total of 261 specimens (body length between 105 and 326 mm) were collected from the Beipan River during 2008 and 2009. The characteristics of annuli on scale, opercular, dorsal fin spine and cleithrum of the species were described and compared and the ages of inviduals were diagnosed according to the annuli of scales. The results showed that the relationship between body length (L) and scale radius (R) of S. lissolabiatus was estimated as L=20.202R+65.726, and the body length (L)-weight (W) relationship might be calculated by the power relationship: W=4×10-5L2.8208. The Von Bertalanffy equations of the species were concluated as Lt=475.51[1-e-0.138 (t+1.1397], Wt=1424.93[1-e-0.138(t+1.1397)2.8208; the growth inflection age was year 6.37. The Von Bertalanffy growth function, Logistic growth function and Gompertz growth function of S. lissolabiatus all might describe exactly the growth of its length and weight, and the Von Bertalanffy growth function was the most suitable model to fit  its growth of length and weight. The growth of length of individuals of S. lissolabiatus at the age of 1year to 4 years was much faster than those of more than 5 years. According to the 8ecological parameters of the species, it was concluded that S. lissolabiatus tends to be a r-selected species.

Key words: Lacertidae, Eremias brenchleyi, Sexual dimorphism, Food habit, Food, Niche breadth, Niche overlap