Ammonia tolerance of Litopenaeus vannamei (Boone) larvae |
| |
| Authors: | María de Lourdes Cobo Stanislaus Sonnenholzner Mathieu Wille Patrick Sorgeloos |
| |
| Institution: | 1. Escuela Superior Politécnica del Litoral (ESPOL), Centro Nacional de Acuicultura e Investigaciones Marinas (CENAIM), , Guayaquil, Ecuador;2. Laboratory of Aquaculture & Artemia Reference Center, Ghent University, , Ghent, Belgium |
| |
| Abstract: | The tolerance of Litopenaeus vannamei larvae to increasing concentrations of total ammonia nitrogen (TAN) using a short‐term static renewal method at 26°C, 34 g L?1 salinity and pH 8.5 was assessed. The median lethal concentration (24 h LC50) for TAN in zoea (1‐2‐3), mysis (1‐2‐3) and postlarvae 1 were, respectively, 4.2‐9.9‐16.0; 19.0‐17.3‐17.5 and 13.2 mg L?1TAN (0.6‐1.5‐2.4; 2.8‐2.5‐2.6 and 1.9 mg L?1 NH3‐N). The LC50 values obtained in this study suggest that zoeal and post‐larval stages are more sensitive to 24 h ammonia exposure than the mysis stage of L. vannamei larvae. On the basis of the ammonia toxicity level (24 h LC50) at zoea 1, we recommend that this level does not exceed 0.42 mg L?1 TAN – equivalent to 0.06 mg L?1 NH3‐N – to reduce ammonia toxicity during the rearing of L. vannamei larvae. |
| |
| Keywords: | Litopenaeus vannamei (Boone) ammonia toxicity larval stages |
|
|
