Influence of different diets on the development of the shrimp Litopenaeus vannamei em bercarios intensivos

• Published in: Acta scientiarum. Biological sciences 2009-01, Vol.31 (1), p.1
• Main Authors: Lourenco, Jullyermes Araujo, Santos, Carlos Henrique dos Anjos dos, Neto, Francisco Hidalecio Ferreira Braga, Arena, Maria Leticia, Igarashi, Marco Antonio
• Format: Article
• Language: Spanish
• ISSN: 1679-9283
• DOI: 10.4025/actascibiolsci.v31i1.454

The objective of this work was to evaluate different diets in the development of L. vannamei post-larvae in intensive nurseries. For this experiment were used 264,000 PL10 with initial weight and length of 11.0 mg and 9.78 mm, respectively, distributed in 12 nurseries of 1,000 L, cultured during 10 days. Four treatments were tested (control--CR40-ART, CR42:48-ART, CR42:48:52 and ART) which were composed of 4 artificial and 1 natural diet, with 3 repetitions, distributed in an entirely randomized delineation. Post-larvae were fed in the proportion of 15% of total biomass. The best survival rates were verified in the treatments CR42:48:52, CR42:48 ART, ART and CR40-ART; with 91.3; 90.5; 81.8 and 70.9% (p > 0.05), respectively. The best development occurred in the shrimp of CR42:48:52 treatments, confirmed by the Tukey Test (p < 0.05), to final length and weight, weight and length gain, food conversion and increments, in comparison to individuals from ART treatments. In regards to biomass gain and final biomass, the CR42:48:52 treatment differed from CR40-ART and ART (p < 0.05) treatments. We concluded that use of different products with high nutritional value gave post-larvae high zootechnical indices, producing shrimp of excellent quality for stocking ponds. Key words: Litopenaeus vannamei, nursery tanks, artificial diets, low-salinity water. Objetivou-se avaliar diferentes dietas no desenvolvimento de pos-larvas do L. vannamei em bercarios intensivos. Utilizaram-se 264.000 [PL.sub.10] com peso e comprimento inicial de 11,0 mg e 9,78 mm, respectivamente, distribuidas em 12 bercarios de 1.000 L, cultivadas durante dez dias. Foram testados quatro tratamentos (controle--RC40-ART, RC42:48-ART, RC42:48:52 e ART), compostos por quatro dietas artificiais e uma natural, com tres repeticoes, distribuidos em delineamento inteiramente casualizado. As pos-larvas foram alimentadas na proporcao de 15% da biomassa total. As melhores taxas de sobrevivencia foram verificadas nos tratamentos RC42:48:52, RC42:48-ART, ART e RC40ART, com 91,3; 90,5; 81,8 e 70,9% (p > 0,05), respectivamente. O melhor desenvolvimento ocorreu nos camaroes do tratamento RC42:48:52, confirmado pelo teste de Tukey (p < 0,05), para o comprimento e peso final, ganho em peso e comprimento, conversao alimentar e incrementos, em comparacao aos individuos do tratamento ART. No que se refere ao ganho de biomassa e biomassa final, o tratamento RC42:48:52 diferiu dos tratamentos RC40-ART e ART (p < 0,05). Con