skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

The osmorespiratory compromise in the euryhaline killifish: water regulation during hypoxia

Wood, Chris M ; Ruhr, Ilan M ; Schauer, Kevin L ; Wang, Yadong ; Mager, Edward M ; McDonald, M Danielle ; Stanton, Bruce ; Grosell, Martin

Journal of experimental biology, 2019-09, Vol.222 (Pt 18) [Periódico revisado por pares]

England: The Company of Biologists Ltd

Texto completo disponível

Citações Citado por
  • Título:
    The osmorespiratory compromise in the euryhaline killifish: water regulation during hypoxia
  • Autor: Wood, Chris M ; Ruhr, Ilan M ; Schauer, Kevin L ; Wang, Yadong ; Mager, Edward M ; McDonald, M Danielle ; Stanton, Bruce ; Grosell, Martin
  • Assuntos: Acclimatization ; Anaerobiosis ; Animals ; Female ; Fresh Water ; Fundulidae - physiology ; Gills - physiology ; Male ; Osmoregulation - physiology ; Oxygen - metabolism ; Salinity ; Seawater ; Water - physiology
  • É parte de: Journal of experimental biology, 2019-09, Vol.222 (Pt 18)
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Freshwater- and seawater-acclimated were exposed to acute hypoxia (10% air saturation, 3 h), followed by normoxic recovery (3 h). In both salinities, ventilation increased and heart rate fell in the classic manner, while  initially declined by ∼50%, with partial restoration by 3 h of hypoxia, and no O debt repayment during recovery. Gill paracellular permeability (measured with [ C] PEG-4000) was 1.4-fold higher in seawater, and declined by 50% during hypoxia with post-exposure overshoot to 188%. A similar pattern with smaller changes occurred in freshwater. Drinking rate (also measured with [ C] PEG-4000) was 8-fold higher in seawater fish, but declined by ∼90% during hypoxia in both groups, with post-exposure overshoots to ∼270%. Gill diffusive water flux (measured with H O) was 1.9-fold higher in freshwater fish, and exhibited a ∼35% decrease during hypoxia, which persisted throughout recovery, but was unchanged during hypoxia in seawater fish. Nevertheless, freshwater killifish gained mass while seawater fish lost mass during hypoxia, and these changes were not corrected during normoxic recovery. We conclude that this hypoxia-tolerant teleost beneficially reduces gill water permeability in a salinity-dependent fashion during hypoxia, despite attempting to simultaneously improve , but nevertheless incurs a net water balance penalty in both freshwater and seawater.
  • Editor: England: The Company of Biologists Ltd
  • Idioma: Inglês
Links
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  3 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.