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

ABSTRACT: 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...

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Autores principales:	Huerta-Ortiz,Maricela, Álvarez-González,Carlos Alfonso, Civera-Cerecedo,Roberto, Martínez-García,Rafael, Camarillo-Coop,Susana, Goytortúa-Bores,Ernesto, Peña,Emyr, Pérez-Morales,Alfredo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2018
Materias:	Atractosteus tropicus Lepisosteidae juveniles tropical gar lipids polynomial models digestibility
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000501073
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spelling	oai:scielo:S0718-560X20180005010732019-04-03Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicusHuerta-Ortiz,MaricelaÁlvarez-González,Carlos AlfonsoCivera-Cerecedo,RobertoMartínez-García,RafaelCamarillo-Coop,SusanaGoytortúa-Bores,ErnestoPeña,EmyrPérez-Morales,Alfredo Atractosteus tropicus Lepisosteidae juveniles tropical gar lipids polynomial models digestibility ABSTRACT: 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.46 n.5 20182018-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000501073en10.3856/vol46-issue5-fulltext-19
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Atractosteus tropicus Lepisosteidae juveniles tropical gar lipids polynomial models digestibility
spellingShingle	Atractosteus tropicus Lepisosteidae juveniles tropical gar lipids polynomial models digestibility Huerta-Ortiz,Maricela Álvarez-González,Carlos Alfonso Civera-Cerecedo,Roberto Martínez-García,Rafael Camarillo-Coop,Susana Goytortúa-Bores,Ernesto Peña,Emyr Pérez-Morales,Alfredo Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus
description	ABSTRACT: 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.
author	Huerta-Ortiz,Maricela Álvarez-González,Carlos Alfonso Civera-Cerecedo,Roberto Martínez-García,Rafael Camarillo-Coop,Susana Goytortúa-Bores,Ernesto Peña,Emyr Pérez-Morales,Alfredo
author_facet	Huerta-Ortiz,Maricela Álvarez-González,Carlos Alfonso Civera-Cerecedo,Roberto Martínez-García,Rafael Camarillo-Coop,Susana Goytortúa-Bores,Ernesto Peña,Emyr Pérez-Morales,Alfredo
author_sort	Huerta-Ortiz,Maricela
title	Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus
title_short	Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus
title_full	Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus
title_fullStr	Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus
title_full_unstemmed	Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus
title_sort	optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for atractosteus tropicus
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000501073
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Optimum level of dietary lipids for growth, chemical composition and apparent digestibility of lipids for Atractosteus tropicus

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