Chondrichthyan distribution atlas within French marine waters
Currently, 106 species of chondrichthyans (40 rays, 59 sharks, and 7 chimaeras) can be found in the marine waters of metropolitan France. 14 chondrichthyans are listed on French IUCN red list and/or national and international legislations and most of them (63 species) are Data Deficient as a result...
Main Authors: | , , , , , , , , , , , , , , , , , , , |
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Other Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Report |
Language: | French |
Published: |
HAL CCSD
2024
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Subjects: | |
Online Access: | https://mnhn.hal.science/mnhn-04475562 https://mnhn.hal.science/mnhn-04475562v3/document https://mnhn.hal.science/mnhn-04475562v3/file/Atlas-Elasmo_v2024-04-17_vf_corrigee.pdf |
Summary: | Currently, 106 species of chondrichthyans (40 rays, 59 sharks, and 7 chimaeras) can be found in the marine waters of metropolitan France. 14 chondrichthyans are listed on French IUCN red list and/or national and international legislations and most of them (63 species) are Data Deficient as a result of lack of data. The protection of these populations has been problematic because the conservation status and spatial distribution of most species are not well known or poorly understood. This chondrichthyan distribution atlas, aims to address measures under the Marine Strategy Framework Directive (MSFD), which requires mapping of the presence of these species within French marine waters. Capture data from onboard observers on commercial fishing vessels, scientific surveys, and citizen science data from 2003 to 2021 were compiled. Given the mobile nature of these species, the study area includes waters up within the North-east Atlantic, specifically Greater North Sea (including Kattegat and English Channel), Celtic Seas, Bay of Biscay and the Iberian Coast, and French western Mediterranean waters. Each species has a fact sheet that includes 1) maps of raw occurrences broken down by 3 regions (MSFD marine waters of North East Atlantic; the Gulf of Lion, and Corsica); 2) information on the ecology (seasonality and depth of captures) and 3) capture by fishing gears and according to their length. To address potential miss-identification issues and identify areas where the presence of a species is unlikely, a certainty of data occurrence index has been implemented. These results are commented on by French chondrichthyans experts in the species sheets, and information on historical distributions or taxonomy, where appropriate, is also provided. The relevance of this Atlas to implementing chondrichthyan conservation measures to meet MSFD requirements are discussed. Actuellement, 106 espèces de chondrichtyens (40 raies, 59 requins et 7 chimères) sont présentes de manière régulière ou occasionnelle dans les eaux maritimes de ... |
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