| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Daily variations of the saccular endolymph and plasma compositions in the turbot Psetta maxima: relationship with the diurnal rhythm in otolith formation
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| Autores: |
Edeyer, Anaick
De Pontual, Helene
Payan, P
Troadec, Herve
Severe, Armelle
Mayer-gostan, N
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| Data: |
2000
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| Ano: |
2000
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| Palavras-chave: |
Daily cycle
Endolymph
Otolith
Chemical composition
Teleost
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| Resumo: |
We studied the circadian variations of the ionic composition ([Na+], [K+], [Cl-]), total CO2 ([tot CO2]), and protein concentration ([protein]) in the plasma and endolymph in the distal and proximal sides of the sacculus in the turbot Psetta maxima. Daily variations in total plasma calcium ([tot Ga]) were also recorded. Significant diurnal fluctuations occurred in most parameters and the spatial heterogeneity of the endolymph composition was maintained throughout a 24 h period. The main parameters implicated in otolith calcification, endolymph [tot CO2] and endolymph [protein], fluctuated diurnally, [tot CO2] was highest and [protein] lowest at night; the relative concentrations were reversed during the day. The inverse, alternating relationship of maximal and minimal [tot CO2] and [protein] implies that calcium carbonate and organic matrix rates of deposition vary in antiphase. We therefore propose that in the turbot P. maxima, in autumn, the incremental zone (L-zone) is formed at night whereas the discontinuous zone (D-zone) is formed during the daytime.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00000/10572/7603.pdf
DOI:10.3354/meps192287
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| Editor: |
Inter-research
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| Relação: |
http://archimer.ifremer.fr/doc/00000/10572/
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| Formato: |
application/pdf
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| Fonte: |
Marine Ecology Progress Series (0171-8630) (Inter-research), 2000 , Vol. 192 , P. 287-294
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