温度对于湘华鲮胚胎与胚后发育的影响

THE EFFECTS OF TEMPERATURE ON THE EMBRYONIC AND POSTEMBRYONIC DEVELOPMENT OF SINILABEO DECORUS TUNGTING

本文报道了温度对湘华鲮胚胎及胚后发育的影响。湘华鲮亲鱼系采自湖南泸溪县的沅水及其支流,经鲤鱼脑垂体催情人工繁殖的受精卵,在不同水温条件下孵化发育。观察的结果表明,湘华鲮胚胎对温度有较强的敏感性,其适宜的温度是 20±2.5℃。过低或过高的水温,可能造成停止发育、死亡或发育畸型。

The fertilized eggs of Sinilabeo decorus lungting had been obtained by artificialfertilization. Eggs were hatched in 3 different temperatures or 20℃, 25℃ and 30℃each with 100 eggs. The experiment was repeated 3 times and the results are sum-marized as follows. The development of the embryo are quite similar to that of other domestic carps-The embryo of this fish is rather sensitive to the change of water temperatures, theexperiment reveals that suitable temperature for hatching is 18-23℃ and 20℃ beingthe optimum. The rate of embryonic abnormality is rather high in this fish oven at the optimum temperature 20℃, there are still 20-35.2% abnormal embryoesproduced. The occurence of abnormalities whether it is a genetic defect of this fish orit is due to the external factors remains unknown.