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

Other titles Abundancia y distribución de los gurnardos en el norte del Mediterráneo
Type Article
Date 2019-12
Language English
Author(s) Colloca Francesco1, 2, Milisenda Giacomo3, Capezzuto Francesca4, Cau Alessandro5, Garofalo Germana1, Jadaud Angelique6, Kiparissis Sotiris7, Micallef Reno8, Montanini Stefano9, Thasitis Ioannis10, Vallisneri Maria9, Voliani Alessandro11, Vrgoc Nedo12, Zupa Walter13, Ordines Rancesc14
Affiliation(s) 1 : National Research Council, Istitituto per le Risorse Biologiche e le Biotecnologie Marine (CNR-IRBIM), Mazara del Vallo (TP), Italy.
2 : Department of Biology and Biotechnology “C. Darwin” BBCD, Sapienza University of Rome, Italy
3 : Stazione Zoologica Anton Dohrn, Lungomare Cristoforo Colombo (ex complesso Roosevelt), 90142 Palermo, Italy.
4 : Department of Biology, University of Bari Aldo Moro, Bari, Italy
5 : Department of Life and Environmental Sciences, Via Tommaso Fiorelli 1, University of Cagliari, Cagliari, Italy.
6 : MARBEC - IFREMER, CNRS, IRD, Université Montpellier 2, Avenue Jean Monnet, CS 30171, 34203 Sète Cedex, France.
7 : Hellenic Agricultural Organization-DEMETER, Fisheries Research Institute of Kavala, 64007 Nea Peramos, Kavala, Greece
8 : Ministry for the Environment, Sustainable Development and Climate Change, Marsa, Malta
9 : Department of Biological, Geological and Environmental Sciences (BIGEA), University of Bologna, Bologna, Italy
10 : Department of Fisheries and Marine Research (DFMR), Nicosia, Cyprus
11 : Environmental Protection Agency Tuscany Region (ARPAT), Settore Mare, Livorno, Italy
12 : Institute of Oceanography and Fisheries. Set. I. Mestrovica 63, 21000 Split, Croatia.
13 : COISPA Tecnologia & Ricerca, Via dei Trulli 18-20, 70126 Bari, Italy
14 : Instituto Español de Oceanografía, Centre Oceanogràfic de les Balears, Palma de Mallorca, Spain.
Source Scientia Marina (0214-8358) (Institut de Ciències del Mar de Barcelona, CSIC), 2019-12 , Vol. 83 , N. S1 , P. 101-116
DOI 10.3989/scimar.04856.30A
WOS© Times Cited 6
Note NS : Mediterranean demersal resources and ecosystems: 25 years of MEDITS trawl surveys M.T. Spedicato, G. Tserpes, B. Mérigot and E. Massutí (eds)
Keyword(s) Triglidae, Mediterranean Sea, trawl by-catch, MEDITS, fishing pressure
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.

Abstract <p>&nbsp;</p>

<p>En este estudio hemos investigado la distribuci&oacute;n espacio-temporal de los gurnardos (8 especies de Triglidae y 1 especie de Peristediidae) en el norte del Mediterr&aacute;neo usando 22 a&ntilde;os de datos de la campa&ntilde;a de pesca de arrastre MEDITS (1994-2015). Los gurnardos mostraron diferencias significativas en la abundancia, dominancia y composici&oacute;n entre las distintas sub-areas geogr&aacute;ficas (GSAs) y las ecoregiones, encontr&aacute;ndose las mayores biomasas relativas (BIy) en Malta, el este de C&oacute;rcega, las Islas Baleares y el oeste del mar J&oacute;nico. Por otro lado, los menores valores de BIy fueron observados en las &aacute;reas m&aacute;s explotadas del oeste del Mediterr&aacute;neo y del Mar Adri&aacute;tico, donde tambi&eacute;n se observ&oacute; el mayor n&uacute;mero de especies con una tendencia lineal negativa en relaci&oacute;n a BIy. La tendencia temporal en la abundancia de especies evidenci&oacute; una disminuci&oacute;n general en las especies costeras (C. lucerna, C. lastoviza, C. obscurus) respecto a las especies que habitan la profunda plataforma y pendiente continentales (T. lyra, P. cataphractum). Los resultados proporcionan por primera vez una visi&oacute;n general de las tendencias espacio-temporales en la abundancia de los gurnardos en la amplia escala espacial del norte del Mediterr&aacute;neo, sugiriendo tambi&eacute;n la posibilidad de usar estas especies como indicadores para monitorear el impacto de la presi&oacute;n de pesca sobre los ensamblajes de peces demersales.</p>
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Colloca Francesco, Milisenda Giacomo, Capezzuto Francesca, Cau Alessandro, Garofalo Germana, Jadaud Angelique, Kiparissis Sotiris, Micallef Reno, Montanini Stefano, Thasitis Ioannis, Vallisneri Maria, Voliani Alessandro, Vrgoc Nedo, Zupa Walter, Ordines Rancesc (2019). Spatial and temporal trend in the abundance and distribution of gurnards (Pisces: Triglidae) in the northern Mediterranean Sea. Scientia Marina, 83(S1), 101-116. Publisher's official version : https://doi.org/10.3989/scimar.04856.30A , Open Access version : https://archimer.ifremer.fr/doc/00486/59749/