Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)

We evaluated the influence of water temperature (Tw) on the energy acquisition and use in the chilean silverside Basilichthys australis (Eigenmann 1927), an endemic species inhabiting freshwater ecosystems in Chile. We tested the effect of Tw (11.5, 14.0, 18.0, 22.0 and 26.0 °C) on food intake, dige...

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Autores principales:	FUENTES,LEOPOLDO, VILA,IRMA, CONTRERAS,MANUEL
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2005
Materias:	water temperature metabolic rate food consumption digestion energy budget Basilichthys australis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200014
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spelling	oai:scielo:S0716-078X20050002000142014-08-12Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)FUENTES,LEOPOLDOVILA,IRMACONTRERAS,MANUEL water temperature metabolic rate food consumption digestion energy budget Basilichthys australis We evaluated the influence of water temperature (Tw) on the energy acquisition and use in the chilean silverside Basilichthys australis (Eigenmann 1927), an endemic species inhabiting freshwater ecosystems in Chile. We tested the effect of Tw (11.5, 14.0, 18.0, 22.0 and 26.0 °C) on food intake, digestibility, food transit time and metabolic rate. As expected, this study demonstrated that many physiological variables under study were significantly affected by Tw, as well as the net energy balance of this species. Nevertheless, the net energy balance was not strictly related to the range of Tws evaluated. At Tws lower than 14 °C the energy budget was depressed, because food intake was lower than at Tws between 14 and 26 °C, where food intake was higher and independent of Tw. Consequently, at these temperatures the energy balance was positive and also independent of Tw. Physiologically, B. australis appears to be a tolerant species with respect to the wide range of water temperature in habitats at different depths. Thus, its distributions may extend through the entire profile of lakes and rivers, even in systems characterised by spatial and temporal thermal variabilityinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.78 n.2 20052005-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200014en10.4067/S0716-078X2005000200014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	water temperature metabolic rate food consumption digestion energy budget Basilichthys australis
spellingShingle	water temperature metabolic rate food consumption digestion energy budget Basilichthys australis FUENTES,LEOPOLDO VILA,IRMA CONTRERAS,MANUEL Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)
description	We evaluated the influence of water temperature (Tw) on the energy acquisition and use in the chilean silverside Basilichthys australis (Eigenmann 1927), an endemic species inhabiting freshwater ecosystems in Chile. We tested the effect of Tw (11.5, 14.0, 18.0, 22.0 and 26.0 °C) on food intake, digestibility, food transit time and metabolic rate. As expected, this study demonstrated that many physiological variables under study were significantly affected by Tw, as well as the net energy balance of this species. Nevertheless, the net energy balance was not strictly related to the range of Tws evaluated. At Tws lower than 14 °C the energy budget was depressed, because food intake was lower than at Tws between 14 and 26 °C, where food intake was higher and independent of Tw. Consequently, at these temperatures the energy balance was positive and also independent of Tw. Physiologically, B. australis appears to be a tolerant species with respect to the wide range of water temperature in habitats at different depths. Thus, its distributions may extend through the entire profile of lakes and rivers, even in systems characterised by spatial and temporal thermal variability
author	FUENTES,LEOPOLDO VILA,IRMA CONTRERAS,MANUEL
author_facet	FUENTES,LEOPOLDO VILA,IRMA CONTRERAS,MANUEL
author_sort	FUENTES,LEOPOLDO
title	Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)
title_short	Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)
title_full	Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)
title_fullStr	Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)
title_full_unstemmed	Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)
title_sort	temperature, energy acquisition and energy use in the chilean silverside basilichthys australis eigenmann (atherinopsidae)
publisher	Sociedad de Biología de Chile
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200014
work_keys_str_mv	AT fuentesleopoldo temperatureenergyacquisitionandenergyuseinthechileansilversidebasilichthysaustraliseigenmannatherinopsidae AT vilairma temperatureenergyacquisitionandenergyuseinthechileansilversidebasilichthysaustraliseigenmannatherinopsidae AT contrerasmanuel temperatureenergyacquisitionandenergyuseinthechileansilversidebasilichthysaustraliseigenmannatherinopsidae
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Temperature, energy acquisition and energy use in the Chilean silverside Basilichthys australis Eigenmann (Atherinopsidae)

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