Use of otoliths to determine age and growth of a tropical flatfish Cyclopsetta querna (Paralichthyidae) from the southeast coast of the Gulf of California, Mexico |
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| Authors: | Felipe Amezcua Ivan Martínez-Tovar Yanira Green-Ruiz Felipe Amezcua-Linares |
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| Institution: | (1) Instituto de Ciencias del Mar y Limnología, UNAM, Joel Montes Camarena s/n Playa Sur, Mazatlán, Sinaloa, C.P. 82040, Mexico;(2) Centro Regional de Investigación Pesquera Mazatlán, Sábalo Cerritos s/n Estero del Yugo, C.P. 82010, Mazatlán, Sinaloa, Mexico |
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| Abstract: | Age and growth of the tropical flatfish Cyclopsetta querna were determined from the sagittal otoliths. From yearly marginal growth increment trends, it was concluded that the opaque
and hyaline zones were formed annually. The oldest individual was a 43.2-cm (5-year-old) female. No significant differences
in length-at-age were found between sexes. The von Bertalanffy growth equation for the entire population was Lt = 60.71 (1 − e (−0.245(t−0.408))). The life span of these species is short, about 5 years. The otoliths proved a reliable structure to determine age of this
species. |
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| Keywords: | Sagittal otolith von Bertalanffy growth equation Marginal growth increment |
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