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Use of Copepods during Early Feeding Stages of Spotted Rose Snapper Larvae in a Scale‐Up System
Author(s) -
PuelloCruz Ana C.,
FloresRojas Aldo A.,
AlmazánRueda Pablo,
GarcíaOrtega Armando
Publication year - 2015
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1080/15222055.2014.1000472
Subject(s) - biology , larva , live food , zoology , fishery , ecology , aquaculture , fish <actinopterygii>
Abstract 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 .