Home / The Effect of Purse Seine Vessel Harvesting in the Eastern Tropical Pacific Yellowfin Tuna Stock

The Effect of Purse Seine Vessel Harvesting in the Eastern Tropical Pacific Yellowfin Tuna Stock

In the eastern tropical Pacific, the purse-seine vessels captures yellowfin tuna as target species under three different fishing modes. We are interested in modeling the influence of these three different fishing modes in the tuna stock. We propose a system of differential equations to model the stock dynamics with proportional harvesting. We analyze a rescaled version of the model where a basic reproductive number was obtained and interpreted in terms of the original parameters. The basic reproductive number was analyzed to study the effect of critical harvesting levels for each fishing mode. Finally we developed some numerical solutions using approximated parameters to study the effect of harvesting on the tuna stock dynamics.

Article Number:
BU-1511-M

Year:
1998

Authors:
Saul Franco, University of California-Irvine
Ignacio Méndez-Gómez-Humarán, El Colegio de la Frontera Norte
Ricardo Ortiz-Rosado, Universidad de Puerto Rico-Cayey
Daniel Sánchez-Araiza, California State University-Dominguez Hills

the_effect_of_purse_seine_vessel_harvesting_in_the_eastern_tropical_pacific_yellowfin_tuna_stock_.pdf