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handle: 10261/318463 , 10508/14591 , 10508/12058
Premier signalement du concombre de mer Parastichopus tremulus (Gunnerus, 1767) (Echinodermata : Aspidochirotida) en Méditerranée (Mer d’Alboran, Méditerranée occidentale). L’holothurie Parastichopus tremulus, une espèce connue seulement du nord-est Atlantique, est signalée pour la première fois en Mer Méditerranée. Cinq individus de l’espèce ont été récoltés près du mont sous-marin Seco de los Olivos en mai 2017 d’un échantillon de chalut de fond effectué pendant la campagne de recherche avec chalut MEDITS. Des photographies au microscope électronique à balayage d’osselets de la paroi du corps sont fournies pour valider l’identification de l’espèce. La connectivité entre les populations atlantiques et méditerranéennes de P. tremulus est suggérée en raison de la proximité d’une population atlantique dans le Golfe de Cádiz et de la présence documentée de larves d’holothurie abondantes dans le vortex anticyclonique originaire du courant atlantique entrant en Méditerranée, près du Détroit de Gibraltar
The holothurian Parastichopus tremulus, a species only know from the north-eastern Atlantic, is reported for the first time from the Mediterranean Sea. Five individuals of the species were collected in the vicinity of the Seco de los Olivos sea mount in May 2017 from a bottom trawl sample carried out during the MEDITS trawl survey. Scanning Electron Microscope images of body wall ossicles are supplied to support species identification. Connectivity between Atlantic and Mediterranean populations of P. tremulus is suggested due to the existence of a nearby Atlantic population in the Gulf of Cádiz and the documented presence of abundant holothuroid larvae in the anticyclonic gyre which originates in the Atlantic current entering the Mediterranean, near the Strait of Gibraltar
Evaluación de Recursos Demersales por métodos directos en el Mar de Alborán
DEMALBORAN
SI
Centro Oceanográfico de Baleares, Atlantic inflow, Echinoderm, Medio Marino, Stichopodidae, Morphological examination, Taxonomy
Centro Oceanográfico de Baleares, Atlantic inflow, Echinoderm, Medio Marino, Stichopodidae, Morphological examination, Taxonomy
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