Spatial and temporal trend in the abundance and distribution of gurnards (Pisces: Triglidae) in the northern Mediterranean Sea

Scientia Marina

Walter Zupa¹  Stefano Montanini²  Maria Vallisneri²  Francesca Capezzuto³  Ioannis Thasitis⁴  Alessandro Cau⁵  Alessandro Voliani⁶  Sotiris Kiparissis⁷  Nedo Vrgoc⁸  Francesc Ordines⁹  Angélique Jadaud^1,10  Reno Micallef^1,11  Francesco Colloca^1,12  Germana Garofalo^1,13  Giacomo Milisenda^1,14 

[1] COISPA Tecnologia & Ricerca;Department of Biological, Geological and Environmental Sciences (BIGEA), University of Bologna;Department of Biology, University of Bari Aldo Moro;Department of Fisheries and Marine Research (DFMR);Department of Life and Environmental Sciences, University of Cagliari;Environmental Protection Agency Tuscany Region (ARPAT);Hellenic Agricultural Organization-DEMETER, Fisheries Research Institute of Kavala;Institute of Oceanography and Fisheries;Instituto Español de Oceanografía, Centre Oceanogràfic de les Balears;MARBEC - IFREMER, CNRS, IRD, Université Montpellier;Ministry for the Environment, Sustainable Development and Climate Change;National Research Council, Istituto per le Risorse Biologiche e le Biotecnologie Marine (CNR-IRBIM) - Department of Biology and Biotechnology “C. Darwin” BBCD, Sapienza University of Rome;National Research Council, Istituto per le Risorse Biologiche e le Biotecnologie Marine (CNR-IRBIM);Stazione Zoologica Anton Dohrn, Lungomare Cristoforo Colombo;

关键词: triglidae;    mediterranean sea;    trawl by-catch;    medits;    fishing pressure;   

DOI  :  10.3989/scimar.04856.30A

来源: DOAJ

【 摘 要 】

In this study we investigated the spatio-temporal distribution of gurnards (8 species of Triglidae and one species of Peristediidae) in the northern Mediterranean Sea using 22 years of MEDITS bottom trawl survey data (1994-2015). Gurnards showed significant differences in terms of abundance, dominance and composition among geographical sub-areas and ecoregions, with the highest relative biomass (BIy) being found in Malta, eastern Corsica, the Balearic Islands and the eastern Ionian Sea. The lowest gurnards BIy were observed in the highly exploited areas of the western Mediterranean and the Adriatic Sea, where the largest number of species with a negative linear trend in BIy was also found. The temporal trends in species abundances highlighted a general decrease for the coastal species (C. lucerna, C. lastoviza, C. obscurus) as compared with the species inhabiting the deep continental shelf and slope (T. lyra, P. cataphractum). The results provide for the first time an overview of the spatiotemporal trend in the abundance of gurnards over the wide spatial scale of the northern Mediterranean Sea, also suggesting the possible use of these species as indicators for monitoring the impact of fishing pressure on demersal fish assemblages.

【 授权许可】

Unknown