Estimating age and growth of roosterfish (Nematistius pectoralis) from otoliths

Ulianov Jakes-Cota, Rafael Chavéz-Arellano, Chugey Sepulveda, Scott Aalbers, Sofía Ortega-García

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

2 Citas (Scopus)

Resumen

The roosterfish is a coastal pelagic species that inhabits shallow waters of the Eastern Pacific Ocean. Despite its ecological and economic importance within the region, there are few studies on its basic biology, especially those focused on age and individual growth. Therefore, the objective of this study was to estimate roosterfish age and individual growth parameters through counting growth increments of sagittal otoliths. The work focused on organisms caught off Baja California Sur, Mexico (BCS) by both the sport and artisanal fishing fleets from 2010–2017. A total of 266 organisms were sampled during the study period, ranging in size from 5.2–133 cm fork length. A model was generated to describe the relationship between otolith radius (OR) and fork length (FL) of the fish, where FL = -43.3 + 44.59 OR. The periodicity of otolith growth increment formation was annual, and this study found roosterfish age estimates to range from 0 to 8 years old, with most individuals ranging from 1–2 years of age. Based on the fitting of the data to three individual growth models (Gompertz, Logistic and von Bertalanffy, VBGF), the VBGF best fit the individual growth curve for roosterfish. The VBGF parameter of L = 131.53, k = 0.35 y t0 = -0.23 supports previous studies and suggests that roosterfish are very fast growing in the first years of life.

Idioma originalInglés
Número de artículo105958
PublicaciónFisheries Research
Volumen240
DOI
EstadoPublicada - ago. 2021
Publicado de forma externa

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