Article Dans Une Revue Scientia Marina Année : 2019

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

Francesco Colloca
  • Fonction : Auteur
Giacomo Milisenda
  • Fonction : Auteur
Francesca Capezzuto
  • Fonction : Auteur
Alessandro Cau
  • Fonction : Auteur
Germana Garofalo
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Sotiris Kiparissis
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Reno Micallef
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Stefano Montanini
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Ioannis Thasitis
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Maria Vallisneri
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Alessandro Voliani
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Nedo Vrgoc
  • Fonction : Auteur
Walter Zupa
  • Fonction : Auteur
Rancesc Ordines
  • Fonction : Auteur

Résumé

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.

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hal-02403259 , version 1 (31-05-2021)

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Francesco Colloca, Giacomo Milisenda, Francesca Capezzuto, Alessandro Cau, Germana Garofalo, et al.. Spatial and temporal trend in the abundance and distribution of gurnards (Pisces: Triglidae) in the northern Mediterranean Sea. Scientia Marina, 2019, ⟨10.3989/scimar.04856.30A⟩. ⟨hal-02403259⟩
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