网围养殖的几种—龄鱼生长规律的研究

STUDY ON THE GROWTH OF ONE-YEAR-OLD FISH IN LAKE PENCULTURE

对湖泊网围养殖的7种鱼类作了早期生长发育规律的探讨及研究,认为一龄鱼种其体长、体重随月龄的增长几呈直线上升。依体长生长直线,将7种鱼归为2类;依体重生长直线,则可将其归为3类.描述体重、体长关系的鱼类生长指数 b 值介于2.8～4.0间.应根据鱼的不同种类、不同年龄,使用不同的 b值计算其丰满度.计算了7种一龄鱼的体长月平均增长指数及体重月平均增重指数,分别为:鲤2.93,275.14;鲫1.92,229.89;鳊1.41,231.05;草2.59,236.53;奥尼2.69,462.94;鲢2.14,145.11;鳙2.33,152.41.

Studies were conducted on the growth and development of one-year-old fish of seven speciesin lake penculture.It was found that the body weight and length of one-year-old fingerlings evenly increasedwith each passing month.Based on the increase of length,these 7 species could be classified into two groups,while based on body weight gain,they could be classified into three groups.The growth index of power func-tional relations concerning the weight and length ranged between 2.8～4.0,indicating that two growths werein parallelism.It was considered that the condition factors should be calculated with b-value according to thedifferences of fish species and ages.The monthly average indexes of the length and weight increases of the 7species were calculated respectively.