松花江哈尔滨段鲫种群资源现状调查与合理利用

Investigation and rational utilization of Carassius auratus population resources in Harbin section of Songhua River

根据2023年夏季至2024年春季对松花江哈尔滨段渔获物调查信息,利用FISAT II软件对鲫(Carassius auratus)样本个体的生长及其种群现状进行了评价,旨在了解松花江哈尔滨段鲫种群资源变动趋势和生长情况,为该区域渔业管理资源保护及生态系统的健康完整性提供一定科学依据。结果显示,该区域鲫种群的渐近体长(L∞)为183.75 mm;生长系数(K)为0.66;拐点年龄与临界年龄分别为1.51a和1.32a;鲫种群资源开发率为0.52。研究表明,目前松花江哈尔滨段鲫种群资源开发过度,鱼类低龄化、小型化现象明显。故为保证松花江哈尔滨段鲫种群的规模,鲫的捕捞规格应控制在体长126.15 mm以上为宜。

Based on the information of fish catches in Harbin section of Songhua River from summer 2023 to Spring 2024,FISAT II software was used to evaluate the growth and population status of Carassius auratus samples in order to understand the variation trend and growth of Carassius auratus population resources.It provides a scientific basis for the protection of fishery management resources and the health integrity of the ecosystem in this region.The results showed that the progressive body length(L∞)of Carassius auratus in this area was 183.75 mm.The growth coefficient(K)was 0.66;The turning point age and critical age were 1.51a and 1.32a,respectively.The exploitation rate of Carassius auratus population was 0.52.The results show that the Carassius auratus population resources in Harbin section of Songhua River have been over-exploited,and the phenomenon of low age and miniaturization of fish is obvious.Therefore,in order to ensure the population size of Carassius auratus in Harbin section of Songhua River,all related nets should be controlled above 126.15 mm.