科研之友
微信
新浪微博
Facebook
分享链接
摘要
Growth but not survival of Spotted Rose Snapper Lutjanus guttatus larvae was improved when calanoid copepods Pseudodiaptomus euryhalinus were included as early feed in a pilot-scale production system. Production of P. euryhalinus that were fed microalgae Nannochloropsis oculata was stable through the snapper spawning season (May-September; 21.4-29.5 degrees C), providing 6,200-9,400 copepods/L with higher nutritional quality than rotifers Brachionus rotundiformis. To evaluate the influence of including P. euryhalinus as a first feed, three dietary treatments were administered to larvae from 3 to 15 d posthatch: (1) P. euryhalinus only, (2) a mix of both P. euryhalinus and B. rotundiformis, and (3) B. rotundiformis only. Use of P. euryhalinus as live feed produced significant differences in larval specific growth rate, which was 48.4% of body weight (BW)/d for treatment 1; 17.5% BW/d for treatment 2; and 7.3% BW/d for treatment 3. However, survival was significantly higher for Spotted Rose Snapper larvae that received B. rotundiformis as feed; survival was 5.2% for treatment 3, whereas it was 2.2% for treatment 2 and 1.4% for treatment 1. Larvae that were given P. euryhalinus as feed also had better biochemical content than larvae that were fed only B. rotundiformis.
- 出版日期2015
