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Daily variations of endolymph composition: relationship with the otolith calcification process in trout ArchiMer
Borelli, G; Guibbohni, M; Mayer Gostan, N; Priouzeau, France; De Pontual, Helene; Allemand, D; Puverel, S; Tambutte, E; Payan, P.
Ionic and organic parameters of the otolith calcification process in the trout Oncorhynchus mykiss were analysed in plasma and endolymph over the day:night cycle. Plasma pH remained constant and total CO2 concentration was significantly lower (by 21%) during the day than at night. Calcifying parameters (total CO2, total calcium concentration) were measured in the proximal and distal endolymphs and were unchanged in the latter during the day:night cycle, but fluctuated in the former. Non-collagenous protein and collagen concentrations in endolymph were higher (1.5- and 10-fold, respectively) during the day than at night. As there was no change in total calcium concentration, we propose that Ca2+ increases during the dark period and was maximal by the end of...
Tipo: Text Palavras-chave: Endolymph; Day night cycle; Calcification; Otolith.
Ano: 2003 URL: https://archimer.ifremer.fr/doc/2003/publication-418.pdf
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