Nom du corpus

Corpus Systématique Animale

Titre du document

Contribution of Na/Na and Cl/Cl exchanges to sodium and chloride fluxes in the crab Goniopsis cruentata

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Arthropodes_v2b_00881
Auteur(s)
  • I. P. Zanders 1
  • Maria-José Martelo 1
Affiliation(s)
  • 1) Lab. Ecofisiologia Animal, Centro de Biofisica y Bioquímica, IVIC, Apdo. 21827, 1020-A, Caracas, Venezuela
Résumé

Sodium or chloride efflux and transepithelial potentials (TEP) were measured in crabs exposed to seawater concentrations ranging from 150 to 25% SW. In crabs acclimated to 150% SW the Na+ efflux (3.8 mmol/h·100 g) was significantly higher than the Cl? efflux (2.1 mmol/h·100 g), but both fluxes decreased to about 0.6 mmol/h·100 g in crabs from 50 or 25% SW. The TEP varied linearly from ?1 mV (blood negative) in 150% SW, to ?11 mV in 25% SW. In 150 and 100% SW the calculated components of the ion fluxes (i.e., diffusive, urinary, active uptake or extrusion) added up to less than one-half of the isotopically measured values. In 50 and 25% SW the measured effluxes were fully accounted for by their calculated components. In crabs transferred from 150% SW to low-Na 150% SW (=TRIS ASW), the Na+ efflux decreased abruptly, from 3.7 to 0.6 mmol/h; the Cl? efflux decreased much less, from 1.9 to 1.5 mmol/h. A large fraction of the Na+ (or Cl?) fluxes in crabs from concentrated SW meets the criteria for exchange diffusion, which decreases or disappears as the external concentration of each ion is lowered. This suggests that changes of the permeability to ions, in response to alterations of environmental salinity, may not constitute an important adaptive strategy in this species.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - physiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Endocrinology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Animal Science and Zoology
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Biochemistry
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Physiology
Catégories WoS
  • 1 - science ; 2 - zoology
  • 1 - science ; 2 - physiology
Identifiant ISTEX
E1CCECE347C33E26B842E6AEA20B9DD4693BBA72
Revue

Journal of Comparative Physiology B

Année de publication
1987
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.604
Sous-corpus
  • Arthropodes
Type de publication
Journal
ark:/67375/1BB-63QB9QHH-G
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