Document Detail

Fishes of southern South America: a story driven by temperature.
MedLine Citation:
PMID:  19189234     Owner:  NLM     Status:  MEDLINE    
The latitudinal extension of southern South America imposes a thermal gradient that affects the structure of marine and freshwater fish assemblages and the biology of the species through direct exposure to the temperature gradients or by means of a web of historical and ecological relationships. We have reviewed biological and ecological data of marine and freshwater fishes from the southern Neotropics, including Patagonia, and report several examples of dependence on temperature, from glacial times to today's climate change. We were able to identify historic and present effects on the diversity of fish assemblages, isolation, southern limits for the distribution of species, and morphological variation among populations. There is a wide range of characteristics that exemplify an adaptation to low temperatures, including biochemical peculiarities, physiological adjustments, and alternative life history patterns, and these appear in both freshwater and marine, and native and exotic fishes. The consequences of stable temperature regimes in both the ocean and thermal streams deserve special mention as these shape specialists under conditions of low selective pressure. At present, habitat use and interactions among species are being subject to changes as consequences of water temperature, and some of these are already evident in the northern and southern hemispheres.
V E Cussac; D A Fernández; S E Gómez; H L López
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Review     Date:  2008-04-16
Journal Detail:
Title:  Fish physiology and biochemistry     Volume:  35     ISSN:  1573-5168     ISO Abbreviation:  Fish Physiol. Biochem.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-02-03     Completed Date:  2009-02-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100955049     Medline TA:  Fish Physiol Biochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  29-42     Citation Subset:  IM    
Instituto de Investigaciones en Biodiversidad y Medio Ambiente, Universidad Nacional del Comahue-CONICET, Bariloche, Río Negro, Argentina.
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MeSH Terms
Fishes / anatomy & histology,  physiology*
Fresh Water
Greenhouse Effect
South America
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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