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Title

Atlantic influence in the demersal Mediterranean fish fauna: to what extent is the Alborán Sea part of the Atlantic Ocean?

AuthorsGil de Sola, Luis; Cartes, Joan Enric ; Olivero, J.; Tello, O.; Lloris, Domingo ; Bruno, J.
KeywordsSurveys
Demersal
Deep-sea
Alboran Sea
Macrobenthic
Issue Date18-Sep-2017
PublisherInternational Council for the Exploration of the Sea
CitationICES Annual Science Conference (2017)
AbstractWe analyzed and discussed the types of distribution, existing for 117 species (of 269) of deep demersal fishes distributed along the North Alborán Sea, Gulf of Vera, Gulf of Alicante and Balearic Sea (Ebro Delta and Tramontana). Data from 19 consecutive years (1994-2012) surveys, with the same sampling protocol (Bertrand et al., 2002), were used to characterize the demersal fishes assemblages inhabiting the deep Mediterranean Spanish bathyal muddy bottoms (200-800 m). Due to relative stability of abiotic conditions in this depths, we theorized about the relevance of Atlantic influence on marine fauna, its distribution according to depth, type of substrate and importance of fishing in certain areas where the local trawling fleet is concentrated
In this paper we analyzed and discussed the types of distribution, existing for 117 species of demersal fishes distributed along the North Alborán Sea, Gulf of Vera, and Balearic Sea (Alicante, Ebro Delta and Blanes coast). Data from 19 consecutive years (1994-2012) surveys, with similar sampling protocol, were used to characterise the demersal fishes assemblages presents in the Mediterranean Spanish circalitoral muddy bottoms (200-800 m)Due to relative stability of abiotic conditions in this depths, we theorized about the relevance of Atlantic marine fauna, the distribution according to the depth, type of substrate, condition and importance of fishing in certain areas where the local trawlingfleet is concentrated.On the one hand, a qualitative approach has been made by means of a modeling (MACOQUI) as well as a quantitative (ind./km2) Thus it has been possible to see that the species of Atlantic origin present a very pronounced latitudinal gradient in the depth strata discriminated.We studied spatial distribution of demersal resources on muddy bottoms in the depth range 200-800 m within the General Fisheries Commission for the Mediterranean (GFCM) geographical sub-unit 1, 2 and 6, and assessed management implications of our results
DescriptionInternational Council for the Exploration of the Sea (ICES) - Conseil International pour l'Exploration de la Mer (CIEM) Annual Science Conference, 18-21 September 2017, Fort Lauderdale, Florida, USA.-- 1 page, 3 figures, 1 table
Publisher version (URL)https://dx.doi.org/10.13140/RG.2.2.28351.20645
URIhttp://hdl.handle.net/10261/178046
Identifiersdoi: 10.13140/RG.2.2.28351.20645
Appears in Collections:(ICM) Comunicaciones congresos
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