Affiliation:
1. Universidad Técnica Estatal de Quevedo (UTEQ), Ecuador
2. Centro de Investigaciones Biológicas del Noroeste, S.C. (CIBNOR), Mexico
3. Universidad de Sonora, Mexico
4. Universidad Autónoma de Nuevo León, Mexico
Abstract
ABSTRACT: This study evaluated the effect of low, medium, and high-water salinity (5, 35, and 50 ppt) on the apparent dry matter, protein, and energy digestibility of two formulated and six commercial diets for juvenile whiteleg shrimp, Litopenaeus vannamei, in a 120-day trial. Digestibility was determined in vivo using chromic oxide as an inert diet marker. Hydrostability in pellets varied from 86.8% to 99.9%; dry matter digestibility varied from 49.1% to 64.1%; protein digestibility showed greater variations at all salinities (56.9%-85.8%); and energy digestibility ranged from 70.1 to 86.4%. Salinity had a significant effect on dry matter, protein, and energy digestibility. Using a principal component analysis (PCA) with a covariance matrix, our findings suggested that the E2 (fishmeal-based formulation) diet and 35 ppt salinity provided optimum hydrostability and digestibility to Pacific white leg shrimp juveniles.
Subject
General Veterinary,Agronomy and Crop Science,Animal Science and Zoology
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