FN Archimer Export Format PT J TI Using acoustic telemetry to estimate post-release survival of undulate ray Raja undulata (Rajidae) in northeast Altantic BT AF Morfin, Marie SIMON, Julien Morandeau, Fabien Baulier, Loic Méhault, Sonia Kopp, Dorothee AS 1:1;2:1;3:1;4:1;5:1;6:1; FF 1:PDG-RBE-STH-LTBH;2:PDG-RBE-STH-LTBH;3:PDG-RBE-STH-LTBH;4:PDG-RBE-STH-LTBH;5:PDG-RBE-STH-LTBH;6:PDG-RBE-STH-LTBH; C1 IFREMER, Laboratoire de Technologie et Biologie Halieutique, 8 rue François Toullec, F-56100, Lorient, France C2 IFREMER, FRANCE SI LORIENT SE PDG-RBE-STH-LTBH IN WOS Ifremer UPR IF 2.482 TC 14 UR https://archimer.ifremer.fr/doc/00503/61432/65312.pdf LA English DT Article DE ;Tagging;Discard survival;Trawl fishery;Elasmobranchs;Bay of Biscay AB The landing obligation introduced in the reform of the European Union Common Fisheries Policy requires landing all catches of species under quota. However, exemptions may be granted for species for which “scientific evidence demonstrates high survival rates”. Captivity experiments are often used to determine fish survival rates, but they are difficult to perform for large species such as rays due to the limited storage capacity of tanks. Thus, little information is available on ray survival after release despite an identified potential for high survival. We used acoustic telemetry to study rays discarded from a coastal bottom trawl fishery in their natural environment and present a new ad hoc approach to derive a minimum survival rate. After capture under commercial conditions in a semi-enclosed bay, 144 rays were tagged with a miniature acoustic transmitter. Survival was assessed based on detections from 15 acoustic receivers deployed in the area and a mobile reception antenna. Then, combining detection data with information on currents provides useful results from a management perspective, as at least 49% of the rays were found to have survived the first 14 days after released, and because the only factor identified that likely decrease survival (i.e. smaller individuals) cannot be improved easily by changing fishing practices. PY 2019 PD AUG SO Ocean & Coastal Management SN 0964-5691 PU Elsevier BV VL 178 UT 000477784400022 DI 10.1016/j.ocecoaman.2019.104848 ID 61432 ER EF