Ion fluxes of Metynnis hypsauchen, a teleost from the Rio Negro, Amazon, exposed to an increase of temperature
Braz. j. biol
;
62(4b): 749-752, Nov. 2002. graf
Article
Dans Anglais
| LILACS
| ID: lil-339373
RESUMO
The aim of this study was to investigate the effect on an increase of temperature on the net ion fluxes on Metynnis hypsauchen, a teleost species from the Rio Negro. Fish were collected in the Anavilhanas archipelago, Rio Negro, Amazon. After 24 h adaptation fish were placed in individual chambers served with a steady flow of recirculated water. Na+ and Cl- fluxes were determined at 26 and 33ºC. After 18 h in the chambers, fish presented an influx of Na+ and Cl-, and the temperature raise to 33ºC led to an efflux of both ions, which remained even after 6 h in this temperature. Six hours were not enough to promote a significant reduction of net ion effluxes, but certainly the fluxes would be in net balance after a longer period of time, since this species can be exposed to this temperature in its natural environment
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Canaux potassiques
/
Canaux sodiques
/
Poissons
/
Température élevée
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
Braz. j. biol
Thème du journal:
Biologie
Année:
2002
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Instituto Nacional de Pesquisas da Amazônia/BR
/
Universidade Federal de Santa Maria/BR
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