Responses of Nile tilapia to different levels of water salinity

A 45 day experiment was carried out to evaluate the effect of water salinity on the performance, haematological parameters and histological characteristics of the gills of the Nile tilapia, Oreochromis niloticus. The water salinity levels evaluated were: 0, 7, 14 and 21 g L-1. Nile tilapia specimens...

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Autores principales:	Azevedo,Rafael Vieira de, Santos-Costa,Karolina dos, Oliveira,Karen Figueiredo de, Flores-Lopes,Fábio, Teixeira-Lanna,Eduardo Arruda, Tavares-Braga,Luís Gustavo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2015
Materias:	Oreochromis niloticus haematology histopathological alterations aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000500003
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spelling	oai:scielo:S0718-560X20150005000032016-10-25Responses of Nile tilapia to different levels of water salinityAzevedo,Rafael Vieira deSantos-Costa,Karolina dosOliveira,Karen Figueiredo deFlores-Lopes,FábioTeixeira-Lanna,Eduardo ArrudaTavares-Braga,Luís Gustavo Oreochromis niloticus haematology histopathological alterations aquaculture A 45 day experiment was carried out to evaluate the effect of water salinity on the performance, haematological parameters and histological characteristics of the gills of the Nile tilapia, Oreochromis niloticus. The water salinity levels evaluated were: 0, 7, 14 and 21 g L-1. Nile tilapia specimens (1.62 ± 0.01 g), distributed into 20 fibreglass tanks (100 L) at a density of 15 fish per tank. There were no significant differences of the water salinity levels on daily feed intake; however, there were differences (P < 0.05) on the daily weight gain, feeding conversion rate and survival. The best results were observed for the water salinity levels of 0 and 7 g L-1. There were no differences (P > 0.05) between these levels. Regarding the haematological parameters, it was observed that the percentage of the haematocrits and the erythrocyte count were influenced (P < 0.05) by the water salinity level, which was not observed for the leukocyte count. The observed histopathological alterations were chloride cell hypertrophy, epithelial lifting, structure alteration, telangiectasia, primary lamellae cells aggregation, fusion and occurrence of aneurisms of different sizes in some secondary lamellae. Regarding the frequency of gills infection intensity, there were slight changes between the salinities of 0, 7 and 14 g L-1 and moderate changes at 21 g L-1. It is concluded that Nile tilapia can be reared in water salinities of up to 7 g L-1 without damage to the parameters evaluated in this work.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.43 n.5 20152015-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000500003en10.3856/vol43-issue5-fulltext-3
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Oreochromis niloticus haematology histopathological alterations aquaculture
spellingShingle	Oreochromis niloticus haematology histopathological alterations aquaculture Azevedo,Rafael Vieira de Santos-Costa,Karolina dos Oliveira,Karen Figueiredo de Flores-Lopes,Fábio Teixeira-Lanna,Eduardo Arruda Tavares-Braga,Luís Gustavo Responses of Nile tilapia to different levels of water salinity
description	A 45 day experiment was carried out to evaluate the effect of water salinity on the performance, haematological parameters and histological characteristics of the gills of the Nile tilapia, Oreochromis niloticus. The water salinity levels evaluated were: 0, 7, 14 and 21 g L-1. Nile tilapia specimens (1.62 ± 0.01 g), distributed into 20 fibreglass tanks (100 L) at a density of 15 fish per tank. There were no significant differences of the water salinity levels on daily feed intake; however, there were differences (P < 0.05) on the daily weight gain, feeding conversion rate and survival. The best results were observed for the water salinity levels of 0 and 7 g L-1. There were no differences (P > 0.05) between these levels. Regarding the haematological parameters, it was observed that the percentage of the haematocrits and the erythrocyte count were influenced (P < 0.05) by the water salinity level, which was not observed for the leukocyte count. The observed histopathological alterations were chloride cell hypertrophy, epithelial lifting, structure alteration, telangiectasia, primary lamellae cells aggregation, fusion and occurrence of aneurisms of different sizes in some secondary lamellae. Regarding the frequency of gills infection intensity, there were slight changes between the salinities of 0, 7 and 14 g L-1 and moderate changes at 21 g L-1. It is concluded that Nile tilapia can be reared in water salinities of up to 7 g L-1 without damage to the parameters evaluated in this work.
author	Azevedo,Rafael Vieira de Santos-Costa,Karolina dos Oliveira,Karen Figueiredo de Flores-Lopes,Fábio Teixeira-Lanna,Eduardo Arruda Tavares-Braga,Luís Gustavo
author_facet	Azevedo,Rafael Vieira de Santos-Costa,Karolina dos Oliveira,Karen Figueiredo de Flores-Lopes,Fábio Teixeira-Lanna,Eduardo Arruda Tavares-Braga,Luís Gustavo
author_sort	Azevedo,Rafael Vieira de
title	Responses of Nile tilapia to different levels of water salinity
title_short	Responses of Nile tilapia to different levels of water salinity
title_full	Responses of Nile tilapia to different levels of water salinity
title_fullStr	Responses of Nile tilapia to different levels of water salinity
title_full_unstemmed	Responses of Nile tilapia to different levels of water salinity
title_sort	responses of nile tilapia to different levels of water salinity
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000500003
work_keys_str_mv	AT azevedorafaelvieirade responsesofniletilapiatodifferentlevelsofwatersalinity AT santoscostakarolinados responsesofniletilapiatodifferentlevelsofwatersalinity AT oliveirakarenfigueiredode responsesofniletilapiatodifferentlevelsofwatersalinity AT floreslopesfabio responsesofniletilapiatodifferentlevelsofwatersalinity AT teixeiralannaeduardoarruda responsesofniletilapiatodifferentlevelsofwatersalinity AT tavaresbragaluisgustavo responsesofniletilapiatodifferentlevelsofwatersalinity
_version_	1714205151701499904

Responses of Nile tilapia to different levels of water salinity

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