Reference : Otolith crystals (in Carapidae): Growth and habit
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
Otolith crystals (in Carapidae): Growth and habit
Parmentier, Eric mailto [Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Morphologie fonctionnelle et évolutive >]
Cloots, Rudi mailto [Université de Liège - ULiège > > Chimie inorganique structurale >]
Warin, R. [> > > >]
Henrist, Catherine mailto [Université de Liège - ULiège > > Chimie inorganique structurale >]
Journal of Structural Biology
Academic Press Inc Elsevier Science
Yes (verified by ORBi)
San Diego
[en] otolith ; carapidae ; aragonite ; habit ; crystal ; daily cycle
[en] The biomineralization of otoliths results mainly from the release of soluble Ca(2+), which is in turn precipitated as CaCO(3) crystals. In some Carapidae, sagittae sections have been shown to reveal a three-dimensional asymmetry with a nucleus close to the sulcal side, an unusual position. This study seeks to understand otolith formation in Carapus boraborensis. The unusual shape of the otolith is partly explained by the distribution of the epithelium cells, and particularly the sensory epithelium. Experimental evidence shows for the first time that aragonite growth takes place along the c-axis. These aragonite needles present two different habits. On the sulcal side is found the acicular form resulting from rapid growth during a short period of time. On the anti-sulcal side, the prismatic form seen there is due to a slower growth speed over longer periods. The otolith surface was observed each hour during a period of 24h in fishes reared in similar conditions. This allowed for the first time the direct observation on the otolith surface of the deposition of the two layers (L-zone and D-zone). In C. boraborensis, the organic-rich layer (D-zone) develops during the day, whereas the CaCO(3) layer (L-zone) seems to be deposited during the night.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS

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