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
in English
| 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
Full text:
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Index:
LILACS (Americas)
Main subject:
Potassium Channels
/
Sodium Channels
/
Fishes
/
Hot Temperature
Limits:
Animals
Language:
English
Journal:
Braz. j. biol
Journal subject:
Biology
Year:
2002
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Instituto Nacional de Pesquisas da Amazônia/BR
/
Universidade Federal de Santa Maria/BR
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