Aspects of the fishery of Selar crumenophthalmus in Central Mexican Pacific coast

Elaine Espino–Barr; Manuel Gallardo–Cabello; Arturo Garcia–Boa; Marcos Puente–G�mez

Volume : VI, Issue : VIII, August - 2017

Aspects of the fishery of Selar crumenophthalmus in Central Mexican Pacific coast

Elaine Espino Barr, Manuel Gallardo Cabello, Arturo Garcia Boa, Marcos Puente G Mez

Abstract :

Studies on the population dynamics of fish species exploited commercially allow to write down a series of management norms to avoid its overexploitation by means of catch quotas and exploitation indexes. Specimens for this study were obtained from November 2012 to October 2013, from the commercial captures in Manzanillo and Santiago bays in Manzanillo, Colima, M�xico. The highest average captures occur during autumn and winter and diminish in spring and summer. The recruitment length was Lr = 18.20 cm, length of first capture was Lc = 20.00 cm. Total mortality for ages 2 to 4 years was Z = 1.630 and the survival rate was S = 0.196. Natural mortality rate was M = 0.700, and fishing mortality was F = 0.930, the exploitation rate was E = 0.570. Increasing fishing mortality from F = 0.930 to F = 2.000 will increment the yield per recruit from 45.9 g to 67.0 grams. The actual age of first capture is 2.3 years, and is the one that produces the best yields. Results on natural mortality rate (M) were compared to those of other authors in other geographic areas of the world, finding differences probably due to climate, genetic and latitudinal position, as well as to the fishing pressure. The increase of the fishing mortality and direct human consumption would improve the fishery yield and would provide higher protein consumption for the low income social class, due to the low cost of this species.