Data/hora: 15/06/2024 09:12:30

Provedor de dados: | 5
País: | France
Título: | Aspects de la régulation osmotique chez le bar juvénile (Dioentrarchus labrax) en élevage et introduit dans les lagunes aménagées de Certes bassin d'Arcachon (Gironde)
Autores: | Boeuf, Gilles; Lasserre, Pierre.
Data: | 1979
Ano: | 1979
Palavras-chave: | Bar; Euryhalinité; ATPases; Régulation osmotique.; Sea-bass; Euryhalinity; ATPases; Osmotic regulation.
Resumo: | Physiological reactions of sea-basses juveniles (2-6 months) have been followed in laboratory after transfer to different salinities during Sum­mer 1976 and 1977 : hyperhaline : 41 %. , euhaline : 30 %. , mesohaline medium : 9-10 %o , and oligohaline environments : 1-3%o . A lot of fish has been acclimated ina lagoon, at Certes, to 15-20, of salinity. The evolution of gill ATPases activities (Na+ + K+ and Mg2+ ) was followed. Results show different Na+ - K+ ATPase levels, in relationship with the salinity : - at 30 and 42 %c, the level is high at the beginning of Summer (22,3 _+ 2,8 moles Pi . mg Prot -1 . h-1 decreases at the end of Summer (10,8 _+ 0,5) then increases in the fall (30,0 +_ 4,7) ; - at 10 %=, , the enzyme's activity level is steadily low, without any fluctuations (11 to 15) ; -  to 1-3 %o, , it stays high during the whole experiment (20 to 21) ; In the natural surrounding (Certes), the measured values appears high enough (21,9 +_ 2,3 at July 19th). The gill Mg ATPase is more stable and any relationship appears with the ambiant salinity. These results are compared with growth and mortality data and the interest of sea bass juveniles rearing in brackish water (10-20 %0 is dis­cussed.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00306/41686/40895.pdf

http://archimer.ifremer.fr/doc/00306/41686/

Editor: | Publications du Centre National pour l'Exploitation des Océans (CNEXO). Série : Actes de colloques, n° 7, 1979, pp. 673-688
Formato: | application/pdf

Fonte:

Centre National pour l’Exploitation des Océan, 1979

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