乌苏里江上游虎头江段哲罗鱼种群结构及生长特性  

The Population Structure and Growth Characteristics of Hucho taimen(Pallas)in the upper Reaches of Wusuli River

作　　者：姜作发[1] 唐富江[1] 尹家胜[1] 董崇智[1] 

机构地区：[1]中国水产科学研究院黑龙江水产研究所,哈尔滨150070

出　　处：《东北林业大学学报》2004年第4期53-55,共3页Journal of Northeast Forestry University

基　　金：科技部公益性工作专项基金项目;科技部基础性工作专项基金项目;"十五"国家科技攻关项目 (2 0 0 1BA50 5B0 50 7);黑龙江省科技攻关项目 (GCO/B51 5)

摘　　要：20 0 2、2 0 0 3年春、秋季对乌苏里江上游虎头江段哲罗鱼种群结构、生长特性进行了调查研究 ,通过对339尾样本分析 ,得其叉长、体重和年龄组成及生长情况 :乌苏里江上游虎头江段哲罗鱼种群结构合理 ,种群生殖群体、补充群体较大 ,有利于资源的增殖和恢复。叉长与体重关系r=0 .995 8,生长拐点年龄t=16 .5 ,拐点体重W =3714 .71g。性成熟年龄 :雌性为 6 + 龄 ,雄性为 5 + 龄 ,性比 (♀ :♂ )为 1.13:1。叉长、体重的相对增长率 8+ 龄以下增长较大 ,生长比速、生长常数、生长指标与之表现出相同的规律性 ,表明乌苏里江上游哲罗鱼 8+ 龄之前生长旺盛 ,以后虽然生长较 8+ 龄之前减慢 ,但仍保持较快的生长特性。The growth characteristics and population structure of Hucho taimen (Pallas) in the upper reaches of Wusuli River were investigated in 2002～2003. The structures of body length, body weight, age and the growth characteristics of the population were analyzed based on analyzing 339 samples. The results show that the population structure is reasonable, and young and breeding individuals take main part in the population, which is important to restore resources. By means of biostatistics analysis, the relationship between body length, L(cm) and body weight, W(g), may be stated by W=0.011 5 L 3.022 3(r=0.995 8). The Von Bertalanffy equations can be calculated as L t=186.00[1-e -0.069 9(t-0.785 0 )], W t=1 2651.26[1-e -0.069 9(t-0.785 0)] 3.022 3, with an inflexion being at t=16.5,correspondingly W=3 714.71 g. Female fishes matures at the age of about 6+ and the male ones 5+, and sex ratio(♀:♂)is about 1.13:1. The growth parameters reflects that Hucho grows fast before the age of 8+ and then slow down, that means Hucho taimen (Pallas) in the upper reaches of Wusuli River grows more actively before 8+ years old, however, elder ones still grows fast relatively.

关 键 词：乌苏里江上游 哲罗鱼 种群结构 生长特性 

分 类 号：S931.3[农业科学—渔业资源]