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Explorative analysis on red mullet (Mullus barbatus) ageing data variability in the Mediterranean ArchiMer
Carbonara, Pierluigi; Zupa, Walter; Anastasopoulou, Aikaterini; Bellodi, Andrea; Bitetto, Isabella; Charilaou, Charis; Chatzispyrou, Archontia; Elleboode, Romain; Esteban, Antonio; Follesa, Maria Cristina; Isajlovic, Igor; Jadaud, Angelique; Garcia-ruiz, Cristina; Giannakaki, Amalia; Guijarro, Beatriz; Kiparissis, Sotiris Elias; Ligas, Alessandro; Mahe, Kelig; Massaro, Andrea; Medvesek, Damir; Mytilineou, Chryssi; Ordines, Francesc; Pesci, Paola; Porcu, Cristina; Peristeraki, Panagiota; Thasitis, Ioannis; Torres, Pedro; Spedicato, Maria Teresa; Tursi, Angelo; Sion, Letizia.
The uncertainty in age estimation by otolith reading may be at the root of the large variability in red mullet (Mullus barbatus) growth models in the Mediterranean. In the MEDITS survey, red mullet age data are produced following the same sampling protocol and otolith reading methodology. However, ageing is assigned using different interpretation schemes, including variations in theoretical birthdate and number of false rings considered, in addition to differences in the experience level of readers. The present work analysed the influence of these variations and the geographical location of sampling on red mullet ageing using a multivariate approach (principal component analysis). Reader experience was the most important parameter correlated with the...
Tipo: Text Palavras-chave: Mullus barbatus; Age variability; MEDITS; Mediterranean; Reader effect; False rings; Date of birth.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00591/70320/68356.pdf
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Spatial variability of Chondrichthyes in the northern Mediterranean ArchiMer
Follesa, Maria C.; Marongiu, Martina F.; Zupa, Walter; Bellodi, Andrea; Cau, Alessandro; Cannas, Rita; Colloca, Francesco; Djurovic, Mirko; Isajlovic, Igor; Jadaud, Angelique; Manfredi, Chiara; Mulas, Antonello; Peristeraki, Panagiota; Porcu, Cristina; Ramirez-amaro, Sergio; Salmeron Jimenez, Francisca; Serena, Fabrizio; Sion, Letizia; Thasitis, Ioannis; Cau, Angelo; Carbonara, Pierluigi.
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...
Tipo: Text Palavras-chave: Fish; Chondrichthyes; Bottom trawl surveys; Distribution; Abundance; Mediterranean.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00600/71220/69591.pdf
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Spatio-temporal variability in the distribution pattern of anglerfish species in the Mediterranean Sea ArchiMer
Barcala, Helena; Bellido, Jose Maria; Bellodi, Andrea; Carbonara, Pierluigi; Carlucci, Roberto; Casciaro, Loredane; Esteban, Antonio; Jadaud, Angelique; Massaro, Andrea; Peristaki, Panagiota; Melendez, Maria Jose; Perez Gil, José Luis; Salmeron, Francisca; Pennino, Maria Grazia.
The Mediterranean distributions of two species of anglerfish, the blackbellied anglerfish (Lophius budegassa) and the white anglerfish (Lophius piscatorius), were analysed from trawl survey data (MEDITS project – Spain, France, Italy and Greece) from 2006 to 2015 implementing a Delta model approach with residuals autocovariate boosted regression trees. Sea bottom temperature (SBT), sea bottom salinity (SBS), bathymetry, slope of the seabed and distance to the coast were considered possible predictors. The results show that the locations with a higher presence, abundance and biomass of L. budegassa are those with a depth range between 150 to 300 m, with an SBT range between 17.5 and 18.5°C, and SBS of 37-38 PSU. Similarly, L. piscatorius shows a higher...
Tipo: Text Palavras-chave: Lophius budegassa; Lophius piscatorius; Species distribution modelling; Mediterranean Sea.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00590/70185/68201.pdf
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