RIM20(9): Habitat suitability assessment for sea urchin (Paracentrotus lividus) within the Basque coast

Author /Editor: Fuensanta Riquelme, Juan Bald, Ibon Galparsoro, Pedro Liria, Iratxe Menchaca y José German Rodríguez

Year: 2013

Content: Over the past few years the gastronomic interest on the sea urchin Paracentrotus lividus has increased in the Basque Country; this has resulted in initiatives to exploit this species in the Basque coast. These initiatives sparked the development of an assessment project of the sea urchin biomass, which is being executed by AZTI-Tecnalia since 2007, to the Directorate of Fisheries and Aquaculture of the Basque Government. Thus, currently information is available on status of sea urchin populations from Ea (Bizkaia) to Hondarribia (Gipuzkoa); density, biomass, size structure, etc. In parallel, it is possible to collect information related to hydrological, geomorphological and biological processes and in the same areas in which it has been the characterization of sea urchin populations. Therefore, the objective of this work was to relate both sources of information, identify those biotic and abiotic variables that could be related and to explain the distribution and structure of sea urchin populations on the Basque coast. The results show a relation of the density, coverage and average size of the sea urchins with the coverage of the algae Gelidium corneum and Corallina elongata, and also with the energy flow of incident wave.


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