Fishery Analysis of Centropomus nigrescensin Central Mexican Pacific
Journal Title: IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) - Year 2018, Vol 11, Issue 6
Abstract
From October 2013 to December 2015, 504 organisms of Centropomus nigrescens were taken directly from the commercial captures in the coasts of Colima and Jalisco, México. The highest average captures of C. nigrescens in Jalisco, occurred in April, July and December; in Colima it occurred in February, May, October and December. The recruitment length was Lr = 39.0 cm, length of first capture was Lc = 48.00 cm. Differences between sexes were: Lr = 63.8 cm for females and Lr= 48.0 for males, Lc = 76.40 cm for females and Lc = 58.00 cm for males. Total mortality for ages 3 to 15 years was Z = 0.33 and the survival rate was S = 0.72. Natural mortality rate was M = 0.14 and fishing mortality F = 0.19. The exploitation rate was E = 0.576. Increasing fishing mortality from F = 0.19 to F = 0.31 will increment the yield per recruit from 1 554 g to 1 605 grams. The age of 7 years produces the best yields. There is no other analysis of the fishery of C. nigrescens in the Mexican Pacific Ocean with which we could compare results; therefore we used data of the fishery of C. undecimalis, a parallel species in Campeche, the Gulf of Mexico. A ban is suggested during the reproduction season to protect them when they aggregate and are more vulnerable to the fishing gears.
Authors and Affiliations
Manuel Gallardo-Cabello, Elaine Espino-Barr, Arturo Garcia-Boa, Marcos Puente-Gómez
Keywords
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- EP ID EP383287
- DOI 10.9790/2380-1106026067
- Views 119
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