Resumen del producto

The growth of the brown smooth-hound shark, Mustelus henlei is determined using a multimodel approach, comparing the von Bertalanffy (VB) and Gompertz growth models in their two and three parameters versions, applied to ages estimated by counting growth bands in vertebrae. The longevity was estimated comparing the performance of different equations. The maximum estimated age was eight years for males and twelve years for females. The two parameter VB model described the growth of females (L8= 99.9, k= 0.53); whereas the three parameter VB was for males (L8= 86.0, k= 0.23, t0= 4.23). The Gompertz model (both versions) showed to be a good fit of both sexes too. Significant differences were observed between the growth curves of both sexes. The age-at-maturity estimated for males was 1.59 years and for females 2.46 years. Differences in growth rates with other populations of this species could be related to environmental factors, but also to sample size, vertebral preparation or model selection. Nevertheless, M. henlei can be classified as a medium longevity species among elasmobranchs, with one of the fastest growing rate, and lowest age-at-maturity.

Palabras clave: Age estimation; Fisheries Management; Gompertz; vertebrae; von Bertalanffy

Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx