FN Archimer Export Format
PT J
TI Risk assessment reveals high exposure of sea turtles to marine debris in French Mediterranean and metropolitan Atlantic waters
BT 
AF DARMON, Gaelle
   MIAUD, Claude
   CLARO, Francoise
   DOREMUS, Ghislain
   GALGANI, Francois
AS 1:1;2:1;3:2;4:3;5:4;
FF 1:;2:;3:;4:;5:PDG-ODE-LITTORAL-LERPAC;
C1 Univ Paul Valery Montpellier, Univ Montpellier, UMR CEFE CNRS 5175, EPHE, 1919 Route Mende, F-34283 Montpellier, France.
   Museum Natl Hist Nat, Serv Patrimoine Nat, 57 Rue Cuvier, F-75005 Paris, France.
   Univ La Rochelle, UMS 3462, CNRS, Observ PELAGIS,Pole Analyt, 5 Allee Ocean, F-17000 La Rochelle, France.
   IFREMER, F-20600 Zi Furiani, Bastia, France.
C2 UNIV MONTPELLIER, FRANCE
   MNHN, FRANCE
   UNIV LA ROCHELLE, FRANCE
   IFREMER, FRANCE
SI CORSE
SE PDG-ODE-LITTORAL-LERPAC
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.451
TC 43
UR https://archimer.ifremer.fr/doc/00346/45697/45317.pdf
LA English
DT Article
AB Debris impact on marine wildlife has become a major issue of concern. Mainy species have been identified as being threatened by collision, entanglement or ingestion of debris, generally plastics, which constitute the predominant part of the recorded marine debris. Assessing sensitive areas, where exposure to debris are high, is thus crucial, in particular for sea turtles which have been proposed as sentinels of debris levels for the Marine Strategy Framework Directive and for the Unep-MedPol convention. Our objective here was to assess sea turtle exposure to marine debris in the 3 metropolitan French fronts. Using aerial surveys performed in the Channel, the Atlantic and the Mediterranean regions in winter and summer 2011–2012, we evaluated exposure areas and magnitude in terms of spatial overlap, encounter probability and density of surrounding debris at various spatial scales. Major overlapping areas appeared in the Atlantic and Mediterranean fronts, concerning mostly the leatherback and the loggerhead turtles respectively. The probability for individuals to be in contact with debris (almost 100% of individuals within a radius of 2 km) and the density of debris surrounding individuals (up to 88 items within a radius of 10 km) were very high, whatever the considered spatial scale, especially in the Mediterranean region and during the summer season. The comparison of the observed mean debris density with random distribution suggested that turtles selected debris areas. This may occur if both debris and turtles drift to the same areas due to currents, if turtles meet debris accidentally by selecting high food concentration areas, and/or if turtles actively seek debris out, confounding them with their preys. Various factors such as species-specific foraging strategies or oceanic features which condition the passive diffusion of debris, and sea turtles in part, may explain spatio-temporal variations in sensitive areas. Further research on exposure to debris is urgently needed. Empirical data on sea turtles and debris distributions, such as those collected aerially, are essential to better identify the location and the factors determining risks.
PY 2017
PD JUN
SO Deep-sea Research Part Ii-topical Studies In Oceanography
SN 0967-0645
PU Pergamon-elsevier Science Ltd
VL 141
UT 000405251400026
BP 319
EP 328
DI 10.1016/j.dsr2.2016.07.005
ID 45697
ER

EF