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Auteur Follesa, M.C.; Marongiu, M.F.; Zupa, W.; Bellodi, A.; Cau, A.; Cannas, R.; Colloca, F.; Djurovic, M.; Isajlovic, I.; Jadaud, A.; Manfredi, C.; Mulas, A.; Peristeraki, P.; Porcu, C.; Ramirez-Amaro, S.; Salmeron Jimenez, F.; Serena, F.; Sion, L.; Thasitis, I.; Cau, A.; Carbonara, P.
Titre Spatial variability of Chondrichthyes in the northern Mediterranean Type Article scientifique
Année 2019 Publication Revue Abrégée Sci. Mar.
Volume 83 Numéro Pages 81-100
Mots-Clés abundance; adriatic sea; balearic-islands; bottom trawl surveys; by-catch; Chondrichthyes; demersal assemblages; depth distribution; distribution; dynamics; elasmobranchs; fish; fisheries; Mediterranean; parameters; patterns
Résumé Thanks to the availability of the MEDITS survey data, a standardized picture of the occurrence and abundance of demersal Chondrichthyes in the northern Mediterranean has been obtained. During the spring-summer period between 2012 and 2015, 41 Chondrichthyes, including 18 sharks (5 orders and 11 families). 22 batoids (3 orders and 4 families) and 1 chimaera, were detected from several geographical sub-areas (GSAs) established by the General Fisheries Commission for the Mediterranean. Batoids had a preferential distribution on the continental shelf (10-200 m depth). while shark species were more frequent on the slope (200-800 m depth). Only three species, the Carcharhiniformes Galeus melastomus and Scyliorhinus canicida and the Torpediniformes Torpedo matmorata were caught in all GSAs studied. On the continental shelf, the Rajidae family was the most abundant, being represented in primis by Raja clavaia and then by R. miraleius, R. polystigma and R. asterias. The slope was characterized by the prevalence of G. melastomus in all GSAs, followed by S. canictda, E. spinax and Squalus blainville. Areas under higher fishing pressure, such as the Adriatic Sea and the Spanish coast (with the exception of the Balearic Islands), show a low abundance of chondrichthyans, but other areas with a high level of fishing pressure, such as southwestern Sicily, show a high abundance, suggesting that other environmental drivers work together with fishing pressure to shape their distribution. Results of generalized additive models highlighted that depth is one of the most important environmental drivers influencing the distribution of both batoid and shark species, although temperature also showed a significant influence on their distribution. The approach explored in this work shows the possibility of producing maps modelling the distribution of demersal chondrichthyans in the Mediterranean that are useful for the management and conservation of these species at a regional scale. However, because of the vulnerability of these species to fishing exploitation, fishing pressure should be further incorporated in these models in addition to these environmental drivers.
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Éditeur de collection Titre de collection Titre de collection Abrégé
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ISSN 0214-8358 ISBN Médium
Région Expédition Conférence
Notes WOS:000504829900007 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2700
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Auteur Mancusi, C.; Baino, R.; Fortuna, C.; De Sola, L.G.; Morey, G.; Bradai, M.N.; Kallianotis, A.; Soldo, A.; Hemida, F.; Saad, A.A.; Dimech, M.; Peristeraki, P.; Bariche, M.; Clo, S.; De Sabata, E.; Castellano, L.; Garibaldi, F.; Lanteri, L.; Tinti, F.; Pais, A.; Sperone, E.; Micarelli, P.; Poisson, F.; Sion, L.; Carlucci, R.; Cebrian-Menchero, D.; Seret, B.; Ferretti, F.; El-Far, A.; Saygu, I.; Shakman, E.A.; Bartoli, A.; Guallart, J.; Damalas, D.; Megalofonou, P.; Vacchi, M.; Colloca, F.; Bottaro, M.; Di Sciara, G.N.; Follesa, M.C.; Cannas, R.; Kabasakal, H.; Zava, B.; Cavlan, G.; Jung, A.; Abudaya, M.; Kolitari, J.; Barash, A.; Joksimovic, A.; Cetkovic, I.; Marceta, B.; Gonzalez Vilas, L.; Tiralongo, F.; Giovos, I.; Bargnesi, F.; Lelli, S.; Barone, M.; Moro, S.; Mazzoldi, C.; Charis, C.; Abella, A.J.; Serena, F.
Titre MEDLEM database, a data collection on large Elasmobranchs in the Mediterranean and Black seas Type Article scientifique
Année 2020 Publication Revue Abrégée Mediterr. Mar. Sci.
Volume 21 Numéro 2 Pages 276-288
Mots-Clés 1st records; basking shark; by-catch; Bycatch; carcharhinidae; carcharodon-carcharias linnaeus; cetorhinus-maximus gunnerus; coast; conservation; databases; geographical distribution; lamniformes cetorhinidae; large elasinobranchs; Mediterranean and Black seas; plumbeus chondrichthyes; sharks
Résumé The Mediterranean Large Elasmobranchs Monitoring (MEDLEM) database contains more than 3,000 records (with more than 4,000 individuals) of large elasmobranch species from 21 different countries around the Mediterranean and Black seas, observed from 1666 to 2017. The principal species included in the archive are the devil ray (1,868 individuals), the basking shark (935 individuals), the blue shark (622 individuals), and the great white shark (342 individuals). In the last decades, other species such as the thresher shark (187 individuals), the shortfin mako (180 individuals), and the spiny butterfly ray (138) were reported with increasing frequency. This was possibly due to increased public awareness on the conservation status of sharks, and the consequent development of new monitoring programs. MEDLEM does not have homo-geneous reporting coverage throughout the Mediterranean and Black seas and it should be considered as a database of observed species presence. Scientific monitoring efforts in the south-eastern Mediterranean and Black seas arc generally lower than in the northern sectors and the absence of some species in our database does not imply their actual absence in these regions. However, the available data allowed us to analyse the frequency and spatial distribution of records, the size frequencies for a few selected the available data allowed us to analyse the frequency and spatial distribution of records, the size frequencies for a few selected species, the overall area coverage, and which species are involved as bycatch by different fishing gears.
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Langue English Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 1108-393x ISBN Médium
Région Expédition Conférence
Notes WOS:000563186800002 Approuvé pas de
Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2870
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