EFFECTS OF DIFFERENT CULTURING DENSITIES ON THE GROWTH OF JUVENILE RAINBOW TROUT AND JUVENILE GOLDEN TROUT UNDER TEMPERATURE CONTROL SYSTEM BY GROUND SOURCE HEAT PUMP

文献类型： 外文期刊

第一作者： Zhao, Y. X.

作者： Zhao, Y. X.;Jiang, M.;Zhao, Y. X.;Chai, Y. H.;Song, L. J.;Sun, X.;Sun, X.;Yu, H. X.;Chai, F. Y.;Cui, Y. C.;Yuan, M. Y.

作者机构：

关键词： temperature control; cold water fish; fry; aquaculture; ecological environment

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.7； 五年影响因子：0.9 ）

ISSN： 1589-1623

年卷期： 2023 年 21 卷 3 期

页码：

收录情况： SCI

摘要： A ground source heat pump temperature control system was used to increase the water temperature of northern winter trout seedling cultivation, and effects of different culturing densities on the growth of juvenile rainbow trout were examined. There were 24 groups including four density groups in each group A and B, and three parallel groups in each group, the culture experiments were carried out for 60 days and 50 days, respectively. Body weight and body length were measured every 10 days during the test, and the feed intake was recorded. The results showed that the final body weight, final body length, daily weight gain, net yield, weight gain ratio, length gain ratio, body weight specific growth ratio, and body length specific growth ratio of group A and B all decreased, as the culturing density increased. In the end of the experiment, the growth dispersion of each density group in group A was significantly different (P < 0.05), and the dispersion degree of group A2 was the lowest. In group B, there was significant difference in growth dispersion between lower density group and higher density group (P < 0.05), and the lowest appeared in group B2. With the increase of density, the feed coefficient of each density group increased, and the feed conversion ratio of A2 group and B2 group were the highest. When the temperature of the ground source heat pump was raised to 12 similar to 14 degrees C, the optimal culture density of juvenile rainbow trout was 400 ind./m(3) (3.5 kg/m(3)), and the optimal culture density of juvenile golden trout was 1500 ind./m(3) (2.91 kg/m(3)).

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