中国水产科学Issue(5)：968-977,10.DOI:10.3724/SP.J.1118.2015.14521
棕点石斑鱼（♀）×鞍带石斑鱼（♂）杂交F1仔、稚、幼鱼的摄食与生长特性分析
Feeding habits and growth characteristics of larval, juvenile, and young F1 of Epinephelus fuscoguttatus (♀) × E. lanceolatus (♂)
摘要
Abstract
Nutrition is an important factor that restricts the normal growth of fish fry. In the nutrition transition period or feeding conversion process, it is crucial that the larval, juvenile, and young fish have access to adequate nutrition. Groupers are ferocious, carnivorous marine fish;if food supply is not sufficient, they feed on their own larvae and juveniles, and breeding efforts undergo substantial loss. In this research, we studied the feeding habits and growth characteristics of larval, juvenile, and young fish of the F1 generation of Epinephelus fuscoguttatus(♀) × E. lanceolatus (♂) cross using artificial ecological methods. The larvae were fed when their mouths opened, and samples selected from the breeding pool every afternoon after the larvae were fed. We sampled every day before the larvae were 10 days old;then, we sampled every 2 days. Each sample consisted of about 15 fish. All samples were used to test how much the fish ate. Other indexes were tested with other samples, the number of samples ranged from 10 to 100. After sampling, we observed morphological characteristics of the fish fry using a dissect-ing microscope, dissected the digestive tract under the dissecting microscope, and recorded amount of bait that had been consumed. The results showed that:(1) the larval grouper started feeding 3 days after hatching when the wa-ter temperature was approximately 29–30°C and the salinity was approximately 29–30. The fish fry’s first bait was the ss type rotifer, followed by the L type rotifer, brine shrimp, and compound feed. The 3-day-old larvae were very weak, with a feeding rate of 32% and repletion rate of 25%. The 5-day-old larvae were more dynamic than the 3-day-old larvae, with a feeding rate of 81.82%and repletion rate of 36.36%. The feeding rate was above 90%when the larvae were older than 7 days old, and the repletion rate was above 90%when the larvae were older than 9 days old. (2) With growth and development of fish fry, the average feeding amount changed. The larvae required 2 h 30 min to achieve satiation at 10 days old, and digestion took 1 h 45 min. The juveniles required 35 min to achieve satiation at 34 days old, and digestion took 3 h 20 min. Young fish required 30 min to achieve satiation and 10 h 25 min for digestion at 48 days old. (3) The correlations between net weight (W) and feeding amount (Y) was expressed as Y=0.2078W−3.3738; average length (L) and days after hatching (X) was expressed as L=2.3159e0.0595X;net weight and days after hatching was expressed as W=0.0748e0.2021X;average length (L) and net weight (W) was expressed as W=0.0045L3.3775;and mouth width (Y) and days after hatching (X) was expressed as Y=1.9687e0.0605X. In this paper, feeding habits and growth characteristics were observed to provide a theoreti-cal basis for large-scale breeding of F1 Epinephelus fuscoguttatus (♀) × E. lanceolatus (♂) offspring.关键词
棕点石斑鱼/鞍带石斑鱼/杂交F1/仔/稚/幼鱼/摄食/生长Key words
Epinephelus fuscoguttatus/E. lanceolatus/crossbred F1/larvae, juveniles, and young fish/feeding habits/growth performance分类
农业科技引用本文复制引用
于欢欢,李炎璐,陈超,孔祥迪,张廷廷,刘莉,徐万土,庞尊方,李文升..棕点石斑鱼（♀）×鞍带石斑鱼（♂）杂交F1仔、稚、幼鱼的摄食与生长特性分析[J].中国水产科学,2015,(5):968-977,10.基金项目
科技部国际合作项目(2012DFA30360) （2012DFA30360）
宁波市农业重点择优委托科技攻关项目(2012C10021) （2012C10021）
