Advanced Approaches Are Required
The challenge of managing the commercial harvesting of the sea urchin Paracentrotus lividus: advanced approaches are required Simone Farina1,6, Maura Baroli1, Roberto Brundu2, Alessandro Conforti3, Andrea Cucco3, Giovanni De Falco3, Ivan Guala1, Stefano Guerzoni1, Giorgio Massaro3, Giovanni Quattrocchi3, Giovanni Romagnoni4,5 and Walter Brambilla3 1 IMC-International Marine Centre, Oristano, Italy 2 Marine Protected Area “Penisola del Sinis-Isola di Mal di Ventre”, Cabras, Oristano, Italy 3 CNR—IAS, National Research Council, Institute for the study of Anthropic impacts and Sustainability in the marine environment, Oristano, Italy 4 COISPA Tecnologia & Ricerca, Bari, Italy 5 Deptartment of Biosciences, University of Oslo, Centre for Ecological and Evolutionary Synthesis (CEES), Oslo, Norway 6 Current Affiliation: Stazione Zoologica Anton Dohrn, Deptartment of Integrative Marine Ecology, Ischia Marine Centre, Ischia, Naples, Italy ABSTRACT Sea urchins act as a keystone herbivore in marine coastal ecosystems, regulating macrophyte density, which offers refuge for multiple species. In the Mediterranean Sea, both the sea urchin Paracentrotus lividus and fish preying on it are highly valuable target species for artisanal fisheries. As a consequence of the interactions between fish, sea urchins and macrophyte, fishing leads to trophic disorders with detrimental consequences for biodiversity and fisheries. In Sardinia (Western Mediterranean Sea), regulations for sea urchin harvesting have been in place since the mid 90s. However, given the important ecological role of P. lividus, the single-species fishery management may fail to take into account important ecosystem interactions. Hence, a deeper understanding of population dynamics, their dependance on environmental constraints and multispecies interactions may help to Submitted 2 April 2020 achieve long-term sustainable use of this resource.
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