Efeito das altas densidades de estocagem no crescimento e sobrevivência de litopenaeus vannamei na fase final de engorda, em sistemas de bioflocos (bft)
Resumo
O objetivo deste estudo foi avaliar o efeito de altas
densidades de estocagem na sobrevivência, crescimento e
na taxa de conversão alimentar de camarões Litopenaeus
vannamei, na fase final de engorda em sistema de Biofloc
Technology (BFT), mantendo os mesmos parâmetros de
água para todos os tratamentos. Os camarões (11,96 ±
1,14g) foram estocados em microcosmos (tanques de 0,50
m2
), conectados a um raceway de cultivo BFT. O
experimento teve duração de 45 dias. Os camarões foram
estocados nas densidades de 150, 300, 450 e 600
camarões/m2
. Bioflocos foram coletados para análise de
composição proximal. Os resultados foram submetidos à
ANOVA uma via e as diferenças foram comparadas pelo
teste de Tukey (α = 0.05). No T300 e T450, o crescimento
e sobrevivência dos camarões não foram afetados pelas
altas densidades. A maior biomassa alcançada (T450) foi
de 5,1 kg/m2 e a melhor conversão alimentar foi de 1,54
no T150. Os resultados deste estudo indicam que as
densidades de estocagem no sistema proposto podem ser
elevadas, mas não superiores a 450 camarões/m2
.
Observou-se ainda que mesmo se a qualidade de água for
mantida igual para todos os tratamentos, há efeito
negativo entre densidade e crescimento dos camarões,
confirmando que esse efeito é comportamental.
The aim of this study was to evaluate the effect of high stocking densities on survival, growth and feed conversion rates of Litopenaeus vannamei shrimp, in final growout phase, in a Biofloc Technology (BFT) culture system, keeping the same water parameters for all treatments. Shrimps (11.96 ± 1.14 g) were stocked in microcosms (0.50/m2 tanks), connected to a BFT system raceway. The study was carried out for 45 days. The shrimp were stocked at densities of 150, 300, 450 and 600 shrimp/m2 . Bioflocs were collected for analysis of proximate composition. The results were submitted to one-way ANOVA, and differences were compared by Tukey test (α = 0.05). In T300 and T450, growth and survival were not affected by high stocking densities. The highest biomass reached (T450) was 5.1kg/m² and the best feed conversion rate was 1.54 in T150. The results of this study indicate that stocking densities in the proposed system can be high, but not exceeding 450 shrimp/m². Furthermore, even maintaining the same water parameters for all treatments, there was a negative effect between density and shrimp growth, confirming that this effect is behavioral.
The aim of this study was to evaluate the effect of high stocking densities on survival, growth and feed conversion rates of Litopenaeus vannamei shrimp, in final growout phase, in a Biofloc Technology (BFT) culture system, keeping the same water parameters for all treatments. Shrimps (11.96 ± 1.14 g) were stocked in microcosms (0.50/m2 tanks), connected to a BFT system raceway. The study was carried out for 45 days. The shrimp were stocked at densities of 150, 300, 450 and 600 shrimp/m2 . Bioflocs were collected for analysis of proximate composition. The results were submitted to one-way ANOVA, and differences were compared by Tukey test (α = 0.05). In T300 and T450, growth and survival were not affected by high stocking densities. The highest biomass reached (T450) was 5.1kg/m² and the best feed conversion rate was 1.54 in T150. The results of this study indicate that stocking densities in the proposed system can be high, but not exceeding 450 shrimp/m². Furthermore, even maintaining the same water parameters for all treatments, there was a negative effect between density and shrimp growth, confirming that this effect is behavioral.
Descrição
Palavras-chave
Engorda de camarões, Parâmetros zootécnicos, Tecnologia bioflocos, Biofloc Technology, Growth parameters, Shrimp growth out
Citação
SILVA, Adriana Ferreira et al. Efeito das altas densidades de estocagem no crescimento e sobrevivência de litopenaeus vannamei na fase final de engorda, em sistemas de bioflocos (bft). Ciência animal brasileira, v. 4, n. 3, p. 279-287, 2013. Disponível em:<http://www.scielo.br/pdf/cab/v14n3/02.pdf>. Acesso em: 10 Fev. 2016.
