Survival and Physiological Recovery after Capture by Hookline: the case study of the Blackspot Seabream (Pagellus bogaraveo)



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Ruiz-Jarabo, Ignacio and Fernández Castro, Miriam and Jerez Cepa, Ismael and Barragán Méndez, Cristina and Pérez, Montse and Pérez, Evaristo and Gil, Juan and Canoura, Jesús and Farias, Carlos and Mancera, Juan Miguel and Sobrino, Ignacio (2021) Survival and Physiological Recovery after Capture by Hookline: the case study of the Blackspot Seabream (Pagellus bogaraveo). Fishes, 6 (4). pp. 1-16. ISSN Electronic: 2410-3888

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Evaluating the survival of discarded species is gaining momentum after the new European Common Fisheries Policy (Article 15 of the European Regulation No. 1380/2013). This regulation introduced a discard ban, with an exemption for those species with demonstrated high survival rates after their capture and release. Candidate species should be evaluated for each fishing gear and geographical area. In this study, we assessed not only survival, but also physiological recovery rates of blackspot seabream (Pagellus bogaraveo) below commercial size captured with a hookline called “voracera” in the Strait of Gibraltar (SW Atlantic waters of Europe). Experiments onboard a commercial fishing vessel were paralleled with studies in controlled ground-based facilities, where the capture process was mimicked, and physiological recovery markers were described. Our results confirmed that hookline capture induced acute stress responses in the target species, such as changes in plasma cortisol, lactate, glucose, and osmolality. However, 90.6% of the blackspot seabreams below commercial size captured with this fishing gear managed to survive, and evidenced physiological recovery responses 5 h after capture, with complete homeostatic recovery occurring within the first 24 h. Based on this study, the European Commission approved an exemption from the discard (EU Commission Delegated Regulation 6794/2018). Thus, the robust methodology described herein can be an important tool to mitigate the problem of discards in Europe.

Item Type:Article
Uncontrolled Keywords:Capture-recapture; Discards; Fisheries policy; Physiology; Survival
Subjects:Medical sciences > Biology > Animal physiology
Medical sciences > Biology > Fishes
ID Code:72310
Deposited On:18 May 2022 10:17
Last Modified:07 Jun 2022 10:38

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