Scientia Marina, Forthcoming Articles

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


https://doi.org/10.3989/scimar.04856.30A

Francesco Colloca
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, Italy
orcid http://orcid.org/0000-0002-0574-2893

Giacomo Milisenda
Stazione Zoologica Anton Dohrn, Lungomare Cristoforo Colombo, Italy
orcid http://orcid.org/0000-0003-1334-9749

Francesca Capezzuto
Department of Biology, University of Bari Aldo Moro, Italy
orcid http://orcid.org/0000-0002-1498-0228

Alessandro Cau
Department of Life and Environmental Sciences, University of Cagliari, Italy
orcid http://orcid.org/0000-0003-4082-7531

Germana Garofalo
National Research Council, Istituto per le Risorse Biologiche e le Biotecnologie Marine (CNR-IRBIM), Italy
orcid http://orcid.org/0000-0001-9117-6252

Angélique Jadaud
MARBEC - IFREMER, CNRS, IRD, Université Montpellier, France
orcid http://orcid.org/0000-0001-6858-3570

Sotiris Kiparissis
Hellenic Agricultural Organization-DEMETER, Fisheries Research Institute of Kavala, Spain
orcid http://orcid.org/0000-0002-0587-8889

Reno Micallef
Ministry for the Environment, Sustainable Development and Climate Change, Malta
orcid http://orcid.org/0000-0003-1921-508X

Stefano Montanini
Department of Biological, Geological and Environmental Sciences (BIGEA), University of Bologna, Italy
orcid http://orcid.org/0000-0002-7286-7805

Ioannis Thasitis
Department of Fisheries and Marine Research (DFMR), Cyprus
orcid http://orcid.org/0000-0002-0940-2212

Maria Vallisneri
Department of Biological, Geological and Environmental Sciences (BIGEA), University of Bologna, Italy
orcid http://orcid.org/0000-0002-6323-4328

Alessandro Voliani
Environmental Protection Agency Tuscany Region (ARPAT), Italy
orcid http://orcid.org/0000-0002-0905-6284

Nedo Vrgoc
Institute of Oceanography and Fisheries, Croatia
orcid http://orcid.org/0000-0002-5208-4512

Walter Zupa
COISPA Tecnologia & Ricerca, Italy
orcid http://orcid.org/0000-0002-2058-8652

Francesc Ordines
Instituto Español de Oceanografía, Centre Oceanogràfic de les Balears, Spain
orcid http://orcid.org/0000-0002-2456-2214

Abstract


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.

Keywords


Triglidae; Mediterranean Sea; trawl by-catch; MEDITS; fishing pressure

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