SciELO - Scientific Electronic Library Online

 
vol.13 issue2Wisteria sinensis (Leguminosae) adventitious in Argentina: First record and expansion mechanismsErosion at the Samborombón Bay and changes in wind direction, province of Buenos Aires, Argentina author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Bookmark


Revista del Museo Argentino de Ciencias Naturales

On-line version ISSN 1853-0400

Abstract

GONZALEZ NAYA, M. Jimena; RAMIREZ, Luciana; GOMEZ, Sergio E  and  MENNI, Roberto C. Temperature and massive fish deaths in southern South America. Rev. Mus. Argent. Cienc. Nat. [online]. 2011, vol.13, n.2, pp. 131-134. ISSN 1853-0400.

Based on a compilation of data on massive fish deaths occurred in southern South America during the Twentieth Century, we assessed the importance of climatic variables on these phenomena. We found a strong relationship (R2 =0.68) between these massive fish deaths and the mean monthly air temperature. Along the annual temperature range there is a central range (14.6° C to 20.0° C), where the probabilities that a fish community suffers massive deaths is very low. Its central point (17.3° C) is very close to the mean annual value (17.2° C) of air temperature variation. We considered this agreement as corroboration at community level of Pianka’s theory on physiological optima. This relationship allows to monitoring the influence of climate changes, because the environmental variation and the zones of mortality and no mortality will change with predicted changes of the mean monthly values of air temperature.

Keywords : Environmental change; Fish communities; Freshwater fish; Massive fish deaths; Temperature; Argentina.

        · abstract in Spanish     · text in English     · pdf in English