文章编号：2095-1191（2019）06-1369-09
Abstract：【Objective】The current research revealed the growth patterns of Schizothorax prenanti，Percocypris pingi and Onychostoma sima Sauvage et Dabry， and accumulated basic data and provided scientific basis for artificial aquaculture and large-scale production. 【Method】In this paper， under the condition of the rhythm of natural water temperature， the three-fish biological indicators such as full length， body length and body weight were regularly measured by the single-culture model， and the annual growth characteristics of the first-instar fish of these three fishes were studied. 【Result】The specific growth rate of the body weight of S. prenantiwas 0.16%/d-1.54%/d， and the specific growth rate of the body length 0.09%/d-0.75%/d. The specific growth rate of the body weight of P. pingiwas 0.10%/d-1.62%/d， and the specific growth rate of the body length 0.02%/d-0.50%/d. The specific growth rate of the body mass of the O. sima was 0.11%/d-2.20%/d，and the specific growth rate of the body length 0.13%/d-0.64%/d. When the monthly mean value of water tempera-ture was greater than 20 ℃（June to October）， the weight growth of the O. simawas relatively fast， and the growth rate was large. When the monthly average temperature of water was less than 20 ℃（November-March of the next year）， the weight gain wassmaller and growth rate was small. The annual increase of P. pingi and S. prenanti was relatively flat， only between the water temperature monthly average of 21.9-23.9 ℃（May to June） the growth was fast. The fitting equation for the body length and body weight of the S. prenanti was y=0.0202x2.9217（R²=0.9778）， the allometry coefficient（b） was 2.9217 and the fitting equation for the full length and body length was y=1.0608x+1.7741（R²=0.9782）. The fitting equation for body length and body weight of P. pingi was y=0.0195x2.8679（R²=0.9925），the b value was 2.8679， and the fitting equation for full length and body length was y=1.1133x+1.1829（R²=0.9879）. The fitting equation for the body length and body weight of the O. sima was y=0.0346x2.7749（R²=0.9919），the b value was 2.7749， the fitting equation for the full length and body length was y=1.2763x-0.2455（R²=0.9969）. 【Conclusion】Under the conditions of artificial breeding， the growth of these three kinds of fish is good. Among them， the annual growth of O. sima is the fastest， followed by S. prenanti， and the growth of P. pingi the slowest. There is also difference in the optimal water temperature for the growth of the three fish species. Therefore， in the process of artificial breeding， the law of annual growth characteristics can be utilized， and the feeding methods of three kinds of fish can be optimized in stages and seasons to promote rapid growth and nutrient supply， and provide guarantee for proliferation and release and species protection.