Efeito da adição do melaço na relação carbono/nitrogênio no cultivo de camarão Litopenaeus vannamei na fase berçário = Effect of molasses addition on carbon/nitrogen ratio in the nursery phase of Litopenaeus vannamei shrimp culture

Abstract

Investigou-se o efeito da adição do melaço nas relações carbono:nitrogênio (C:N) sobre o desempenho zootécnico do camarão Litopenaeus vannamei, na fase berçário, quando cultivado sem renovação de água. As relações do C:N foram avaliadas nas proporções de 25:1 (25M), 15:1 (15M) e o controle (0M), sem aplicação de carbono, em delineamento experimental inteiramente casualizado, com quatro repetições. Pós-larvas (PL) com peso inicial de 2,5 ± 0,5 mg, foram estocadas em 12 tanques (800 L volume útil), em densidades de 6,25 PL L-1, durante 42 dias de cultivo. Ao final do cultivo, os pesos finais dos camarões dos tratamentos 25M (532,0 mg) e 15M (540,0 mg) foram superiores (p The effect of molasses addiction on carbon:nitrogen ratios (C:N) on the performance of Litopenaeus vannamei shrimp during the nursery phase cultured without water exchange was investigated. The C:N ratios were evaluated in 25:1 (25M) and 15:1 (15M) proportion and a control (0M), with no carbon source addition, in a randomized experimental design with four replicates. Post-larvae (PL) with initial weight of 2.5 ± 0.5 mg were stocked in 12 tanks (800 L net volume), at the density of 6.25 PL L-1 during 42 culture days. At the end of culture, the shrimps weights on 25M (532.0 mg) and 15M (540.0 mg) treatments were higher (p < 0.05) than the 0M (428.6 mg) treatment. Shrimp survival was high in all treatments (77.9 to 90.0%), but without significant difference (p ≥ 0.05). Therefore, the 15 and 25:1 C:N ratios showed an increased growth performance of nursery phase L. vannamei post-larvae cultured without water exchange.

Keywords

• melaço
• relação C:N
• crescimento
• Litopenaeus vannamei
• molasses
• C:N ratio
• growth
• Litopenaeus vannamei