Development of a static-water ecoassay with microcosm tanks for postlarval Penaeus vannamei

A static-water ecoassay was developed to quantify the chemical impact of unassimilated nutrients and metabolic wastes on water quality in aquaculture. Using shrimp as the test animal, increased stocking densities and feeding rates increased nutrient loading in the water column. A stocking density an...

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Bibliographic Details
Published in:Aquaculture 1998-02, Vol.161 (1), p.79-87
Main Authors: Velasco, Mario, Lawrence, Addison L, Neill, William H
Format: Article
Language:English
Subjects:
ACUICULTURA
ALIMENT POUR ANIMAUX
Animal aquaculture
Animal productions
AQUACULTURE
Aquaculture water quality
Bioassay
Biological and medical sciences
CALIDAD DEL AGUA
Crustacea
Crustaceans
DIGESTIBLE NITROGEN
EFFICACITE ALIMENTAIRE
EFICIENCIA DE CONVERSION DEL PIENSO
FEED CONVERSION EFFICIENCY
FEEDS
Food
Fundamental and applied biological sciences. Psychology
Invertebrate aquaculture
Marine
MATIERE AZOTEE DIGESTIBLE
NITROGENO ASIMILABLE
Nutrition
PENAEUS VANNAMEI
PIENSOS
QUALITE DE L'EAU
Quality
Shrimp
Water
WATER QUALITY
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Summary:A static-water ecoassay was developed to quantify the chemical impact of unassimilated nutrients and metabolic wastes on water quality in aquaculture. Using shrimp as the test animal, increased stocking densities and feeding rates increased nutrient loading in the water column. A stocking density and feeding rate that resulted in high weight gain (28%/day) and survival (89%) of Penaeus vannamei postlarvae (PL) were selected as appropriate for evaluating feed formulations. At the end of the 21-day growth trial, mass-balance analysis accounted, on average, for 90% of the phosphorus and 85% of the nitrogen that had entered the culture system. Assimilation of phosphorus and nitrogen into shrimp biomass averaged 25% for phosphorus and 63% for nitrogen. This static-water ecoassay has good potential for laboratory evaluation of nutrient dynamics in shrimp culture using 5- to 10-day-old PL at a stocking density of 1.5 PL/l (444 PL/m 2) and a high variable feeding rate.
ISSN:0044-8486
1873-5622
DOI:10.1016/S0044-8486(97)00258-5