Otolith Annulus Formation and Growth of Two Redhorse Suckers (Moxostoma: Catastomidae).
Using
otolith weight to predict the age of different stocks of Sperata aor (Siluriformes: Bagridae) from the River Ganga
Otolith readers agreed on ages for 285 of 287 samples.
Otolith chemistry, including both elemental and isotopic composition, and
otolith structure may help to differentiate these life-history patterns as well as identify migrations and habitat use during early life histories.
Stock identification, mainly of commercial fishes, has usually been addressed on the analysis of body shape (Silva, 2003; De La Cruz-Aguero & Garcia-Rodriguez, 2004; Tzeng, 2004; Ibanez-Aguirre et al., 2006; Garcia-Rodriguez et al., 2011; Vergara-Solana et al., 2013) and of sagitta
otolith shape (Campana & Casselman, 1993; DeVries et al., 2002; Felix-Uraga et al., 2005; Stransky et al., 2008; Ramirez-Perez et al., 2010), or on the analysis of the shape of both structures (Vergara-Solana et al., 2013).
"The
otolith is a record of the growth of each individual," Llopiz said.
2010: Application of
otolith in studies on fish age and growth.
The term
otolith refers to calcareous structures in the inner ear of teleost fish.
indica is a fairly reliable distinguishing character that makes recognition in mixed catches easy, but identification should be based on the vertebrae, swim bladder and
otolith where possible.
After field collection, the
otolith pairs were first cleaned in an ultrasonic water bath for about 15 min, and then transferred to a tap-water filled transparent vessel for age determination under a VanGuard microscope.
Larval duration, size at settlement, and growth rates were estimated from the
otoliths. Previous work has validated daily
otolith increment deposition in the Tidewater Goby (Hellmair 2010), and increments were assumed to be daily in the Arrow Goby.