Otolithe
See also: Statolithe
A otolithe ( oto : ear, lithographies : hone) - or statoconie or otoconie or statolithe - is a concretion found in the vestibular Système of the internal ear and a normal component of this body.
They are small calcium carbonate crystals of form oblong and located in the membrane otoconiale. They join the sensory epithelium utricular maculae and take part in the estimate of linear accelerations.
Otolithes of fish
The osseous fish (which exclude the Requin S, the Raie S and the Lamproie S) all are equipped with otolithes. Whereas the human one has only one pair of otolithes, the fish have three of them: largest, one of sagittae and two smaller, of lapilli and astericii.
These otolithes has a lamellate structure , with Cerne S of growth, from which one can evaluate the age of fish, the history of sound Environnement and of its Santé. The observers of the fishing laugh use them to study the populations of interest. The pair of otolithes which one studies more is that of sagittae, which one generally puts in a Liquide, like the Glycérine, to observe them by Transparence and under an ordinary lighting.
See too
-
For details, the site of the ''' Research laboratory on the otolithes ''' (Oceanographical Institute of Bedford).
| Random links: | Jean-Pierre Dardenne | Mansión maniaca | Tom | Duels of tchatche and other tricks of the Toulouse folklore | Summon of Fejér | Ponorac | Province_de_Catane |