于2003年秋季对乌苏里江上游黑斑狗鱼Esox reicherti的种群结构和生长特性进行了调查研究,共采集样本840尾。结果表明:该水域的黑斑狗鱼主要由6+龄以下个体组成,其中以3+龄以下个体为主。体长与体重之间的关系为W=0.0051L3.1023(r=0.9762);生长方程为Lt=120.17[1-e-0.1215(t+0.5983)],Wt=15139.22[1-e-0.1215(t+0.5983)]3.1023;生长拐点年龄t=8.7龄,拐点体重W=4531.7 g,说明黑斑狗鱼在8#龄前均能维持较快增长。鉴于目前的捕捞状况,应对4#~8#龄之间的个体适当加以保护。 The population structure and growth characteristics of Esox reicherti in the upper reaches of the Ussuri River in the autumn of 2003 were investigated and 840 samples were collected. The results showed that the black spot pike in this area mainly consists of individuals below 6 years old, of which individuals below 3 years old are dominant. The relationship between body length and body weight was W = 0.0051L3.1023 (r = 0.9762); the growth equation was Lt = 120.17 [1-e-0.1215 (t + 0.5983)], Wt = 15139.22 [1-e-0.1215 t + 0.5983)] 3.1023. The turning point of growth was t = 8.7 years old, and the weight of inflection point was W = 4531.7 g, which indicated that the black spot pike could maintain rapid growth before 8 # age. In view of the current fishing conditions, 4 # ~ 8 # individuals should be appropriately protected.