Artículos de revistas
Modeling of the Pacific sardine Sardinops caeruleus fishery of the Gulf of California, Mexico
Fecha
1999Autor
Nevarez Martínez, Manuel O.
Chávez Ortiz, Ernesto Aarón
Cisneros Mata, Miguel A.
Lluch Belda, Daniel
Institución
Resumen
We used a stochastic age-structured model with density-dependent recruitment to study the fishery and population dynamics of the Gulf of California Pacific sardine (Sardinops caeruleus) stock for the period 1972-1973 to 1989-1990. To determine the value of fishing mortality (F) which corresponds to the long-term optimum yield and cost-benefit ratio (C/B), we simulated fished population trajectories over a period of 50 years. Our results indicated a good fit between observed and predicted annual recruitment and catch. Quasiperiodic oscillations of a five year periodicity for an unfished population faded with increasing F. Maximum yield and C/B were obtained with F=0.475 and 0.275, and the simulated population began declining with F>=0.5 and >=0.3, respectively. It is proposed that F<0.25 would be adequate for this fishery.