Population dynamics of the pink shrimp Farfantepenaeus subtilis (Pérez-Farfante, 1967) in northeastern Brazil

Abstract

This study provides information on the population structure, growth, mortality, maximum recruitment yield, and longevity for pink shrimp Farfantepenaeus subtilis (Pérez-Farfante, 1967) on the coast of Pernambuco state, northeastern Brazil. A total of 1246 specimens (545 males and 701 females) were monthly collected from August 2011 to July 2012. Mean total length of females was higher |$(11.42\, \pm 1.61\,{\rm{cm}})$| than males |$(10.5\, \pm \,1.62\,{\rm{cm}})$| and dominated in the largest length classes. Estimation of von Bertalanffy growth parameters for total length resulted in |${L_\infty }$| of |$19.74\,{\rm{cm}}$| and |$k$| of |$1.06\,{\rm{yea}}{{\rm{r}}^{ - 1}}$| for males, while females’ |${L_\infty }$| was |$21.64\,{\rm{cm}}$| and |$k$| was |$1.10\,{\rm{yea}}{{\rm{r}}^{ - {\rm{1}}}}$|⁠. Mortality of females was higher than males resulting higher value in the exploitation rates. The exploitation rate for maximum recruitment yield was similar between males and females with a value of 0.67, which was above the exploitation rates (0.50-0.64).