Growth effect on the otolith and somatic size relationship in ayu Plecoglossus altivelis altivelis in Lake Biwa

Akihisa Sakai
2018 Aquaculture Science  
The relationship between otolith and somatic size was examined for ayu Plecoglossus altivelis altivelis sampled in Lake Biwa. Combined allometric (otolith radius < 400 µm) and linear (otolith radius ≥ 400 µm) equations showed the closest fit relationship between otolith radius and standard length. Slower growing ayu tend to have larger otoliths than faster growing ayu at the same somatic size. This phenomenon has been called the growth effect and may be a cause of bias in the back-calculation of fish length from otoliths.
doi:10.11233/aquaculturesci.66.133 fatcat:m4js7m6pc5fl3lfy5pv7zv4v6y