Dietary salt and water pH effects on growth and Na+ fluxes of silver catfish juveniles
This study verified the optimum dietary salt level for the growth and ion regulation of silver catfish juveniles at different water pH levels (5.5, 7.0 and 9.0). The control diet was supplemented with NaCl to yield experimental diets with 0.5, 1.0 and 2.0% NaCl. Juveniles were collected at 15 and 35...
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Published in | Acta scientiarum. Animal sciences Vol. 33; no. 3; pp. 261 - 266 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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01.09.2011
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Abstract | This study verified the optimum dietary salt level for the growth and ion regulation of silver catfish juveniles at different water pH levels (5.5, 7.0 and 9.0). The control diet was supplemented with NaCl to yield experimental diets with 0.5, 1.0 and 2.0% NaCl. Juveniles were collected at 15 and 35 days after the beginning of experiment for analyses of Na+ net fluxes. Exposure of silver catfish juveniles to alkaline or acidic water did not affect their survival. Fish fed with diets without NaCl supplementation and exposed to pH 7.0 showed significantly higher weight, length, specific growth rate and biomass per tank than those exposed to pH 5.5. Ionoregulatory disturbances of silver catfish maintained at all pH are less pronounced when fed higher dietary salt supplementation (1.0-2.0% NaCl). The increase of dietary NaCl reduced body Na+ loss and protected against the impact of acidic water on growth. |
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AbstractList | This study verified the optimum dietary salt level for the growth and ion regulation of silver catfish juveniles at different water pH levels (5.5, 7.0 and 9.0). The control diet was supplemented with NaCl to yield experimental diets with 0.5, 1.0 and 2.0% NaCl. Juveniles were collected at 15 and 35 days after the beginning of experiment for analyses of Na+ net fluxes. Exposure of silver catfish juveniles to alkaline or acidic water did not affect their survival. Fish fed with diets without NaCl supplementation and exposed to pH 7.0 showed significantly higher weight, length, specific growth rate and biomass per tank than those exposed to pH 5.5. Ionoregulatory disturbances of silver catfish maintained at all pH are less pronounced when fed higher dietary salt supplementation (1.0-2.0% NaCl). The increase of dietary NaCl reduced body Na+ loss and protected against the impact of acidic water on growth. |
Author | Baldisserotto, Bernardo Kochhann, Daiani Cunha, Mauro Alves Garcia, Luciano De Oliveira Copatti, Carlos Eduardo |
AuthorAffiliation | Universidade Federal do Rio Grande Universidade de Cruz Alta Universidade Federal de Santa Maria |
AuthorAffiliation_xml | – name: Universidade Federal de Santa Maria – name: Universidade Federal do Rio Grande – name: Universidade de Cruz Alta |
Author_xml | – sequence: 1 givenname: Carlos Eduardo surname: Copatti fullname: Copatti, Carlos Eduardo – sequence: 2 givenname: Luciano De Oliveira surname: Garcia fullname: Garcia, Luciano De Oliveira – sequence: 3 givenname: Daiani surname: Kochhann fullname: Kochhann, Daiani – sequence: 4 givenname: Mauro Alves surname: Cunha fullname: Cunha, Mauro Alves – sequence: 5 givenname: Bernardo surname: Baldisserotto fullname: Baldisserotto, Bernardo |
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DocumentTitleAlternate | Efeito do sal na dieta e do pH da água no crescimento de juvenis de jundiá |
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Keywords | dietary NaCl dieta de NaCl acidic water águas ácidas águas alcalinas alkaline water |
Language | English |
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