Use of Copepods during Early Feeding Stages of Spotted Rose Snapper Larvae in a Scale-Up System
2015
Puello-Cruz, Ana C. | Flores-Rojas, Aldo A. | Almazán-Rueda, Pablo | García-Ortega, Armando
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°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.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library