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| Boeuf, Gilles; Lasserre, Pierre. |
| 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,... |
| Tipo: Text |
Palavras-chave: Bar; Euryhalinité; ATPases; Régulation osmotique.; Sea-bass; Euryhalinity; ATPases; Osmotic regulation. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00306/41686/40895.pdf |
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| Rocha,Thiago L.; Carvalho,Rodolfo; Yamada,Áureo T.; Sabóia-Morais,Simone M. T.. |
| The present study evaluated and characterized the different phases of development and the cell types present in the gill epithelium of embryos, larvae, and fingerlings of guppy (Poecilia vivipara Bloch & Schneider, 1801) specimens exposed to water with salinity ranging from 0 to 20. The development of P. vivipara was classified into eight phases. The yolk was intensely eosinophilic, with glycidic and lipidic components between phases 1 to 7. After the development of their branchial epithelium, the presence of pavement cells, mitochondria-rich cells, and mucous cells (MCs) was observed. The understanding of ontogenesis indicates the sequence of cellular origin. Only type IV MCs located in the gill rays was detected from phase 3 through phase 7.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Developmental biology; Euryhalinity; Guppy; Mucous cells; Teleosts. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000400007 |
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