Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)

Determining habitat conditions that generate individual physiological variability represents key basic knowledge to understand the direction of animal's responses to habitat change. The coastal fish Scartichthys viridis inhabits low intertidal pools along the Chilean coast. Because seawater in...

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Autores principales: PULGAR,JOSÉ M, BOZINOVIC,FRANCISCO, OJEDA,F. PATRICIO
Lenguaje:English
Publicado: Sociedad de Biología de Chile 2007
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400005
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spelling oai:scielo:S0716-078X20070004000052008-03-18Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)PULGAR,JOSÉ MBOZINOVIC,FRANCISCOOJEDA,F. PATRICIO intertidal fish physiological compensation tidepool Scartichthys viridis Determining habitat conditions that generate individual physiological variability represents key basic knowledge to understand the direction of animal's responses to habitat change. The coastal fish Scartichthys viridis inhabits low intertidal pools along the Chilean coast. Because seawater in the low intertidal is renewed during every tidal cycle, this zone is characterized by a low thermal variation and abundant food within and between localities. We evaluated whether seawater thermal conditions and food availability of low intertidal pools registered in three localities of Chilean coast are sufficient to generate physiological and energetic differences in individuals of S. viridis captured from three geographic separate populations spanning approximately 1,200 km. Southern fishes acclimatized to 25 °C showed higher metabolic rates than those from other localities and thermal treatments. On the other hand, southern fishes in natural conditions showed higher condition factor than northern fishes. This evidence is sufficient to indicate that slight latitudinal differences in tidepool seawater temperature associated to differential food availability induced an energetic constraint in this species. Moreover, southern population of S. viridis may suffer important effects on energetic allocation if seawater temperature increases slightly, with repercussions on its geographic distribution in southern Pacific Oceaninfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.80 n.4 20072007-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400005en10.4067/S0716-078X2007000400005
institution Scielo Chile
collection Scielo Chile
language English
topic intertidal fish
physiological compensation
tidepool
Scartichthys viridis
spellingShingle intertidal fish
physiological compensation
tidepool
Scartichthys viridis
PULGAR,JOSÉ M
BOZINOVIC,FRANCISCO
OJEDA,F. PATRICIO
Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)
description Determining habitat conditions that generate individual physiological variability represents key basic knowledge to understand the direction of animal's responses to habitat change. The coastal fish Scartichthys viridis inhabits low intertidal pools along the Chilean coast. Because seawater in the low intertidal is renewed during every tidal cycle, this zone is characterized by a low thermal variation and abundant food within and between localities. We evaluated whether seawater thermal conditions and food availability of low intertidal pools registered in three localities of Chilean coast are sufficient to generate physiological and energetic differences in individuals of S. viridis captured from three geographic separate populations spanning approximately 1,200 km. Southern fishes acclimatized to 25 °C showed higher metabolic rates than those from other localities and thermal treatments. On the other hand, southern fishes in natural conditions showed higher condition factor than northern fishes. This evidence is sufficient to indicate that slight latitudinal differences in tidepool seawater temperature associated to differential food availability induced an energetic constraint in this species. Moreover, southern population of S. viridis may suffer important effects on energetic allocation if seawater temperature increases slightly, with repercussions on its geographic distribution in southern Pacific Ocean
author PULGAR,JOSÉ M
BOZINOVIC,FRANCISCO
OJEDA,F. PATRICIO
author_facet PULGAR,JOSÉ M
BOZINOVIC,FRANCISCO
OJEDA,F. PATRICIO
author_sort PULGAR,JOSÉ M
title Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)
title_short Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)
title_full Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)
title_fullStr Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)
title_full_unstemmed Inter-population thermal variability and physiological response in the intertidal fish Scartichthys viridis (Blenniidae)
title_sort inter-population thermal variability and physiological response in the intertidal fish scartichthys viridis (blenniidae)
publisher Sociedad de Biología de Chile
publishDate 2007
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400005
work_keys_str_mv AT pulgarjosem interpopulationthermalvariabilityandphysiologicalresponseintheintertidalfishscartichthysviridisblenniidae
AT bozinovicfrancisco interpopulationthermalvariabilityandphysiologicalresponseintheintertidalfishscartichthysviridisblenniidae
AT ojedafpatricio interpopulationthermalvariabilityandphysiologicalresponseintheintertidalfishscartichthysviridisblenniidae
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