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Modelo multiespecífico para la merluza y el lirio en aguas españolas

Author

Listed:
  • Marcos Pérez Pérez
  • M. Dolores Garza Gil
  • Manuel M. Varela Lafuente

Abstract

El objetivo de este trabajo es desarrollar un modelo depredador-presa para dos especies de importancia comercial capturadas por la flota pesquera española en el caladero nacional (zonas ICES VIIIc y IXa). En este modelo, la merluza del sur (Merluccius merluccius) representa el depredador y el lirio o bacaladilla (Micromesistius poutassou) representa la presa. El lirio es la principal presa de la merluza en el área de estudio, y representa alrededor del 40 % de la dieta de merluza. Existe interacción lineal entre las poblaciones de depredadores y presas, con dos coeficientes de interacción: α es el efecto de un cambio unitario en la presa sobre la tasa de crecimiento porcentual del depredador, y β es la tasa de ataque o eficiencia de búsqueda del depredador. El objetivo es maximizar el valor presente de los beneficios de la pesquería mixta, utilizando el principio del máximo de la teoría del control óptimo. Los resultados obtenidos hasta el momento muestran que la externalidad derivada de la interacción entre ambas especies aumenta con el precio de la merluza y con el coste de captura del lirio, y disminuye cuando aumenta el precio del lirio o el coste de captura de la merluza.

Suggested Citation

  • Marcos Pérez Pérez & M. Dolores Garza Gil & Manuel M. Varela Lafuente, 2014. "Modelo multiespecífico para la merluza y el lirio en aguas españolas," Working Papers 1403, Universidade de Vigo, Departamento de Economía Aplicada.
    • Handle: RePEc:vig:wpaper:1403
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    References listed on IDEAS

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