Título

Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus

Autor

Carlos Alfonso Álvarez González

ROBERTO CIVERA CERECEDO

rafael martinez-garcia

SUSANA CAMARILLO COOP

ERNESTO GOYTORTUA BORES

Emyr Peña

Alfredo Pérez Morales

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Referencia de publicación

doi: DOI: 10.3856/vol46-issue5-fulltext-19

URL/URL: http://lajar.ucv.cl/index.php/rlajar/article/view/vol46-issue5-fulltext-19

ISSN/ISSN: 0718-560X

Materias

Atractosteus tropicus, Lepisosteidae, juveniles, tropical gar, lipids, polynomial models, digestibility. - (AUTOR) BIOLOGÍA Y QUÍMICA - (CTI) CIENCIAS DE LA VIDA - (CTI) BIOLOGÍA ANIMAL (ZOOLOGÍA) - (CTI) NUTRICIÓN - (CTI) NUTRICIÓN - (CTI)

Resumen o descripción

"Lipids requirement of tropical gar Atractosteus tropicus prejuveniles and juveniles was evaluated on growth, survival, chemical composition and apparent digestibility coefficient (ADC). Four semi-purified experimental diets (5, 10, 15 and 20% of lipids) were obtained with a mix of menhaden oil and soybean lecithin (2:1 ratio). Two trials were carried out, first with 600 prejuveniles of 0.5 g (35 days post-hatching, dph) for 56 days, and the second with 160 juveniles of 15 g (two-months-old) for 42 days. In the first trial, 15 (40.8 g) and 20% (40.2 g) lipid diets showed the best weight. Significant differences were obtained in condition factor (CF), daily lipid intake (DLI), hepatosomatic index (HSI), crude protein, ashes, nitrogen-free extract, moisture and ether extract between treatments. In the second trial, fish fed with the 10% lipid diet obtained the highest weight (89.1 g) compared with the other treatments. Significant differences were recorded for weight gain (WG), feed conversion ratio (FCR), specific growth rate (SGR), condition factor (CF), and lipid efficiency rate (LER). Also, significant differences were obtained in crude protein, ether extract, NFE, gross energy, apparent lipid ADC, protein ADC and dry matter ADC. The polynomial models applied to both trials indicated an optimum lipid requirement of 17% for 0.5 g juveniles and of 9% for 15.2 g juveniles."

Editor

PONTIFICIA UNIVERSIDAD CATÓLICA DE VALPARAÍSO

Fecha de publicación

2018

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://cibnor.repositorioinstitucional.mx/jspui/handle/1001/1667

Formato

application/pdf

Fuente

Latin American Journal of Aquatic Research

Idioma

Inglés

Repositorio Orígen

Repositorio Institucional CIBNOR

Descargas

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