81 research outputs found

    Suivi biologique d'une réserve marine de la CÎte Bleue (Golfe de Marseille, Méditerranée, France)

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    The “CĂŽte Bleue” marine parc, located between Fos and Marseilles (French Mediterranean coast), includes two fisheries reserves at Carry-le-Rouet (85 ha, created in 1983) and Cape Couronne (210 ha, created in 1996), both provided with anti-trawling and production artificial reefs. The biological survey of Cap-Couronne reserve has been repeated with the same protocol every three years since 1995 and took into account the initial state of communities before protection. This programme aims at assessing (i) the ecosystem restoration, (ii) the benefits of this protection regime for sustaining the resources exploited by the low-tech small fisheries. It includes visual censuses of fish assemblages and standardized fishing operations made by professional (trammel net) and amateur (hook-and-line) fishermen within and outside the reserve. Both methods attest that the abundance and the individual size of the most valuable fish species are markedly increasing, and that the behaviour of these species tends to be more natural. After five years of protection, the reserve fish stocks are still in a replenishment stage, but the greater abundance of large-sized individuals of targeted species and changes in their behaviour suggest that the reproductive success of those species will increase significantly and will benefit the fishing activities outside the reserveLe Parc Marin de la CĂŽte Bleue, situĂ© entre Fos et Marseille, gĂšre deux rĂ©serves intĂ©grales, Ă  Carry-le-Rouet (85 ha, crĂ©Ă©e en 1983) et au cap Couronne (210 ha, crĂ©Ă©e en 1996). Ces deux rĂ©serves sont amĂ©nagĂ©es avec des rĂ©cifs artificiels de protection anti-chalut et de production et font l'objet de suivis biologiques depuis leur crĂ©ation. Le programme de suivi de la rĂ©serve de Cap-Couronne a Ă©tĂ© rĂ©pĂ©tĂ© trois fois selon le mĂȘme protocole depuis 1995 avec un point zĂ©ro de l'Ă©tat des peuplements avant l'application des mesures de protection et d'amĂ©nagement. Ce programme a pour objectifs : (i) la mise en Ă©vidence de la rĂ©gĂ©nĂ©ration de l'Ă©cosystĂšme littoral ; (ii) l'Ă©valuation des acquis de la protection d'une zone bien dĂ©finie pour une gestion concertĂ©e des ressources halieutiques au bĂ©nĂ©fice de la petite pĂȘche artisanale. Il comprend des recensements visuels des assemblages de poissons et des pĂȘches standardisĂ©es rĂ©alisĂ©es avec des pĂȘcheurs professionnels (filet trĂ©mail) et amateurs (lignes). Les deux mĂ©thodes d'Ă©valuation montrent que l'abondance et la taille individuelle des poissons les plus recherchĂ©s sont en nette augmentation, et qu'il y a une restauration de leur comportement naturel. AprĂšs cinq ans de protection, le peuplement ichtyologique de la rĂ©serve est encore en phase de restauration, mais l'augmentation observĂ©e du nombre de gros gĂ©niteurs d'espĂšces de forte valeur commerciale et l'amĂ©lioration de leur comportement permettent de prĂ©dire un accroissement du succĂšs reproductif de leurs populations dans la rĂ©serve, au bĂ©nĂ©fice de l'exploitation halieutique en pĂ©riphĂ©rie

    The World Amphipoda Database: history and progress

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    We provide an overview of the World Amphipoda Database (WAD), a global species database that is part of the World Register of Marine Species (WoRMS). Launched in 2013, the database contains entries for over 10,500 accepted species names. Edited currently by 31 amphipod taxonomists, following WoRMS priorities, the WAD has at least one editor per major group. All accepted species are checked by the editors, as is the authorship available for all of the names. The higher classification is documented for every species and a type species is recorded for every genus name. This constitutes five of the 13 priorities for completion, set by WoRMS. In 2015, five LifeWatch grants were allocated for WAD activities. These included a general training workshop in 2016, together with data input for the superfamily Lysianassoidea and for a number of non-marine groups. Philanthropy grants in 2019 and 2021 covered more important gaps across the whole group. Further work remains to complete the linking of unaccepted names, original descriptions, and environmental information. Once these tasks are completed, the database will be considered complete for 8 of the 13 priorities, and efforts will continue to input new taxa annually and focus on the remaining priorities, particularly the input of type localities. We give an overview of the current status of the order Amphipoda, providing counts of the number of genera and species within each family belonging to the six suborders currently recognized

    I.4.1. – BiocĂ©nose de la roche supralittorale

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    I.4.1.c. – Enclave : Cuvettes Ă  salinitĂ© variable

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    Stenothoidae (Crustacea: Amphipoda) of hydrothermal vents and surroundings on the Mid-Atlantic Ridge, Azores Triple Junction zone

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    Four new species of Stenothoidae were collected from the Azores Triple Junction zone during different French cruises on the Mid‐Atlantic Ridge. One of the species belongs to the genus Torometopa (T. saldanhae) and is the first record of this genus in the Atlantic Ocean. The three other species belong to the genus Stenothoe (S. divae, S. marvela, and S. menezgweni). It is not possible to determine from morphological and ecological characters whether these amphipod species are endemic to hydrothermal systems or are bathyal species that may be found away from vent sites

    I.4.1.a. – Association Ă  CyanobactĂ©ries et Hydropunctaria amphibia (Syn Verrucaria amphibia)

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    European species of Haustorius (Crustacea: Amphipoda: Haustoriidae) with description of a new Mediterranean species

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    The genus Haustorius is represented by six species in the world; three are described as American species, three European including a new species described from the Mediterranean. This new species, H. orientalis, is similar to H. algeriensis Mulot, from the Algerian coast but differs in rostrum slightly exceeding in length the antennal lobes, merus of pereiopod 7 with posterior margin lacking spines, and uropod 1 with two separate rows of spines

    Principes utilisés pour déterminer les espÚces et les espaces patrimoniaux dans la définition des ZNIEFF-MER

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    Bellan-Santini Denise. Principes utilisĂ©s pour dĂ©terminer les espĂšces et les espaces patrimoniaux dans la dĂ©finition des ZNIEFF-MER . In: Revue d'Écologie (La Terre et La Vie), tome 59, n°1-2, 2004. p. 348
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