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对额尔齐斯河白斑狗鱼和黑龙江黑斑狗鱼的种群结构和生长特性进行比较研究。结果表明,白斑狗鱼由10个年龄组组成,体长与体重的关系式为W=2×10-5L2.9006,生长方程为Lt=1085.49(1-e-0.1372(t+0.60387)),Wt=12658.26(1-e-0.1372(t+0.60387))3,生长拐点为7.42龄,拐点体重为3750.60g,其在8龄前能维持较快速的生长;黑斑狗鱼由7个年龄组组成,体长与体重的关系式分别为W=4×10-6L3.1367,生长方程为Lt=1588(1-e-0.1119(t+0.46587)),Wt=43870.1(1-e-0.111(9t+0.46587))3,生长拐点为9.35龄,拐点体重为12998.55g,其在10龄前能维持较快速的生长:同时探讨2种狗鱼生态学参数的地理差异。鉴于2种狗鱼的资源现状,建议应加强对4+～7+龄个体的保护。
A comparative study on population structure and growth characteristics of Eryshkur and Heilongjiang pike. The results showed that the white spotfish was composed of 10 age groups, the relationship between body length and body weight was W = 2 × 10-5L2.9006, the growth equation was Lt = 1085.49 (1-e-0.1372 (t + 0.60387) Wt = 12658.26 (1-e-0.1372 (t + 0.60387)) 3, the turning point of growth was 7.42 and the weight of inflexion point was 3750.60g, which maintained rapid growth before 8th instar. The relationship between body composition, body length and body weight were W = 4 × 10-6L3.1367, growth equation Lt = 1588 (1-e-0.1119 (t + 0.46587)), Wt = 43870.1 (1-e-0.111 9t + 0.46587) .3. The turning point of growth was 9.35 and the weight of inflection point was 12998.55g, which could maintain rapid growth before the tenth instar. The geographical differences of ecological parameters of two kinds of pike were also discussed. In view of the current status of the resources of the two kinds of dogfish, it is suggested that the protection of 4 + ~ 7 + individuals should be strengthened.