论文部分内容阅读
采用生长测量、摄食节律评估的方法研究了人工养殖条件下刀鲚(Coilia nasus)的摄食和生长特性,旨在为刀鲚积累基础生物学资料,同时为大规模开展刀鲚的池塘养殖提供参考。结果表明:经过153d的生长期,刀鲚的平均体长从最初的(12.41±2.21)cm增加到(21.25±2.08)cm,体重从(5.83±0.91)g增加到(40.58±12.98)g;体长与日龄为线性相关(L=0.0558t+13.102,R2=0.97),体重与日龄为指数相关(W=6.5699e0.0123t,R2=0.98),体重与体长之间呈幂函数关系(W=0.0006L3.5924)幂指数b值接近3;刀鲚鱼种有明显的昼夜摄食节律,4:00—8:00是刀鲚鱼种的摄食高峰期,12:00左右摄食活动基本停止,16:00起摄食强度又明显回升,属晨昏摄食;此外还发现,枝角类、桡足类、日本沼虾和鰕虎鱼是培育刀鲚鱼种较为适宜的饵料生物,但其不同发育阶段适宜饵料生物有所不同,摄食量与饵料的种类和数量有直接关系。
The feeding and growth characteristics of Coilia nasus under artificial breeding conditions were studied by using the method of growth measurement and feeding rhythm to accumulate the basic biological data of Cochinealis as well as to provide a reference for the large-scale cultivation of Cochinchinensis . The results showed that the average body length of Daphniphyllum increased from (12.41 ± 2.21) cm to (21.25 ± 2.08) cm and increased from (5.83 ± 0.91) g to (40.58 ± 12.98) g after 153 days. Body length was linearly related to age (L = 0.0558t + 13.102, R2 = 0.97). Body weight was related to age (W = 6.5699e0.0123t, R2 = 0.98) (W = 0.0006L3.5924) power index b value is close to 3; Dictyostelium species has obvious circadian rhythm, 4: 00-8: 00 is the peak food intake of Dorsal cuttlefish, about 12: 00 feeding activity Basically stopped, feeding intensity rose obviously again from 16:00, belonging to twilight feeding; In addition, it was also found that cladocera, copepoda, Macrobrachium nippon and goby are the suitable bait organisms to cultivate Daphniphyllum. However, Different developmental stages suitable for food organisms are different, food intake and the type and quantity of food have a direct relationship.