Protein and lipid requirements of three-spot cichlid Cichlasoma trimaculatum larvae
Autor: | Carlos Alfonso Álvarez-González, Rafael Martínez-García, M. Sáenz de Rodrigáñez, Andrea Guadalupe Hilerio-Ruiz, F. J. Toledo-Solís, Mario A. Galaviz |
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Rok vydání: | 2019 |
Předmět: |
Physiology
Dietary lipid Aquatic Science Biochemistry Feed conversion ratio 03 medical and health sciences medicine Animals Trypsin Food science Lipase 030304 developmental biology chemistry.chemical_classification 0303 health sciences biology Proteins Cichlids 04 agricultural and veterinary sciences General Medicine biology.organism_classification Dietary Fats Lipids Diet Cichlasoma trimaculatum Enzyme chemistry Digestive enzyme 040102 fisheries biology.protein 0401 agriculture forestry and fisheries Dietary Proteins Leucine medicine.drug |
Zdroj: | Fish Physiology and Biochemistry. 46:23-37 |
ISSN: | 1573-5168 0920-1742 |
Popis: | Determination of the main nutritional requirements at different developmental stages is a prerequisite in the formulation of feeds for newly cultured fish species. In the present study, the lipid and protein requirements of larvae of a native Mexican fish, the three-spot cichlid Cichlasoma trimaculatum, were assessed using a two-factor experimental design that considered four protein (35, 40, 45, and 50%) and two lipid levels (16 and 22%) on growth, survival, and digestive enzyme activities. The best growth and feed efficiency results were obtained when larvae were fed diets including 45% protein and 22% lipids. Comprehensive evaluation of the profile of digestive enzymes using multivariate analysis also demonstrated significant differences in nutritional condition generated by varying inclusion of nutrients. Thus, an increase in protein led to an increase in alkaline protease activity and a reduction in leucine aminopeptidase activity, and the reduction of dietary lipid content led to a significant increase in lipase and trypsin enzymatic activities. Based on our results, C. trimaculatum larvae have a high capacity to hydrolyze both nutrients (protein and lipids) for the high digestive enzyme activities and increase their growth, particularly with a diet containing 45% protein and 22% lipids. |
Databáze: | OpenAIRE |
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