Recursos Marinos y Pesquerías

ASLO Aquatic Science meeting (23-30 January 2009)

15/02/09 ,

La ultima semana de enero (del 23 al 30) tuvo lugar el ASLO Aquatic Science meeting en Niza (Francia). Un miembro del grupo, Maria Jose Juan Jorda, presentó un trabajo donde se cuantifica como responden los escombridos a la explotación pesquera usando modelos jerárquicos. Este proyecto se desarrolla dentro del marco del proyecto METAOCEANS . Os dejamos aquí la versión pdf de la charla.

Abstract (get talk in pdf)

Since the 1950s Scombrids have been subject to large removals of biomass in their populations. The impacts of fisheries on tuna species have been a hot debate in the last few years giving rise to widely different views on the present status of large predatory tunas. This family is comprised of 48 species distributed throughout the world oceans which have developed diverse life history strategies and therefore can be expected to respond differently to fisheries exploitation. This study characterizes and quantifies the responses of Scombridae species to fishing exploitation on a global scale. We have attempted to compile all fisheries data sets worldwide, including catches, size composition and biomass estimates. Biomass trends and changes in size structure were estimated using both traditional and Bayesian hierarchical models. These methods combine different sources of information and consider the hierarchical nature of the data. The understanding of how “data rich” species respond to exploitation can help with a priory predictions of responses of related stocks with similar life history traits and lacking the proper data to be well managed.