Gillanders 2011 Developing baseline data to understand environmental change: a geochemical study of archaeological otoliths
from the Coorong, South Australia.
If you tilt your head to the side the otoliths
detect this change and send a message to the brain.
Anadromy in Arctic populations of lake trout (Salvelinus namaycush): otolith
microchemistry, stable isotopes, and comparisons with Arctic char (Salvelinus alpinus).
Several researchers have studied its age and growth estimation by using different ageing structures such as spines (van der Waal & Schoonbee, 1975; Bruton & Allanson, 1980; Quick & Bruton, 1984), vertebrae (Pivnicka, 1974; Willoughby & Tweddle, 1978), and otoliths
(Bruton & Allanson, 1980; Quick & Bruton, 1984).
The fishs movements are recorded in the otolith
like tree rings, with chemicals being deposited every day the fish is alive.
In the external sector, the otoliths
were obtained only in the late wet period (5.
The theoretical basis behind stock identification that is based on otolith
chemistry is that otoliths
are deposited at, or very close to, oxygen isotopic equilibrium with ambient seawater and thus scientists can create a record of the environmental changes that an individual fish experiences through time (Gao et al.
is a record of the growth of each individual," Llopiz said.
There are many different structures for fish age estimation, such as scales, otoliths
, vertebrae and opercular bones (Khan et al.
We examined scats for presence of Asian carp otoliths
and pharyngeal teeth and calculated their percentage occurrence in the otter's diet.
Differences among otoliths
in different species reflect varying deposition rates which are mainly affected by metabolic rates and other genetic factors.
2008) Ageing Seabream: A comparative study between scales and otoliths