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title Sea turtle strandings along the Portuguese mainland coast: spatio-temporal occurrence and main threats
authors Nicolau, L; Ferreira, M; Santos, J; Araujo, H; Sequeira, M; Vingada, J; Eira, C; Marcalo, A
author full name Nicolau, Lidia; Ferreira, Marisa; Santos, Jorge; Araujo, Helder; Sequeira, Marina; Vingada, Jose; Eira, Catarina; Marcalo, Ana
title Sea turtle strandings along the Portuguese mainland coast: spatio-temporal occurrence and main threats
nationality internacional
source MARINE BIOLOGY
language English
document type Article
keywords plus SMALL-SCALE FISHERIES; DERMOCHELYS-CORIACEA; LOGGERHEAD TURTLES; LEATHERBACK TURTLES; CARETTA-CARETTA; CLIMATE-CHANGE; ATLANTIC; BYCATCH; PATTERNS; WATERS
abstract The present study is a detailed analysis of sea turtle strandings over a 36-year period (1978-2013) along the Portuguese mainland coast. Out of the 806 stranded individuals, the loggerhead turtle Caretta caretta was the most frequent species (57.1 %) followed by the leatherback turtle Dermochelys coriacea (41.8 %), while green turtles Chelonia mydas and Kemp's Ridley turtles Lepidochelys kempii were rare (respectively 1.0 and 0.1 %). Relative stranding densities of loggerheads showed an increase through time, whereas two leatherback stranding peaks were detected during the years 1994-1998 and 2009-2013. The highest loggerhead stranding density was observed on the southern coast during spring and summer when they are more susceptible to anthropogenic threats. The highest number of leatherback strandings was observed in the North-Central and Central-South western sectors during autumn and in the southern sector during summer, which may relate to seasonal food availability and water temperature considering those stranded animals that were subject to a post-mortem evaluation interaction with fisheries as the primary cause of stranding. Results show for the first time that waters off the Portuguese mainland coast is an important pathway for loggerheads and leatherbacks in the North Atlantic region. The present study serves as important baseline to the development of future sea turtle conservation efforts in the Portuguese mainland coast.
author address [Nicolau, Lidia; Santos, Jorge; Araujo, Helder; Eira, Catarina; Marcalo, Ana] Univ Aveiro, Dept Biol, Campus Univ Santiago, P-3810193 Aveiro, Portugal; [Nicolau, Lidia; Santos, Jorge; Araujo, Helder; Eira, Catarina; Marcalo, Ana] Univ Aveiro, Ctr Estudos Ambiente & Mar, Campus Univ Santiago, P-3810193 Aveiro, Portugal; [Nicolau, Lidia; Ferreira, Marisa; Santos, Jorge; Araujo, Helder; Vingada, Jose; Eira, Catarina; Marcalo, Ana] Univ Minho, Soc Portuguesa Vida Selvagem, Dept Biol, Campus Gualtar, P-4710057 Braga, Portugal; [Ferreira, Marisa] Univ Minho, Dept Biol, Ctr Biol Mol & Ambiental, Campus Gualtar, P-4710057 Braga, Portugal; [Sequeira, Marina] Inst Conservacao Nat & Florestas, Ave Republ 16, P-1050191 Lisbon, Portugal; [Vingada, Jose] Univ Minho, Dept Biol, Campus Gualtar, P-4710057 Braga, Portugal; [Vingada, Jose] Univ Minho, Ctr Estudos Ambiente & Mar, Campus Gualtar, P-4710057 Braga, Portugal
reprint address Nicolau, L (reprint author), Univ Aveiro, Dept Biol, Campus Univ Santiago, P-3810193 Aveiro, Portugal.; Nicolau, L (reprint author), Univ Aveiro, Ctr Estudos Ambiente & Mar, Campus Univ Santiago, P-3810193 Aveiro, Portugal.
e-mail address lvrnicolau@ua.pt
funding agency and grant number Portuguese Wildlife Society; projects SafeSea EEA-Grants; European Commission's Life Programme [MarPro NAT/PT/00038]; Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/51416/2011, SFRH/BPD/64889/2009, SFRH/BD/30240/2006]; MARES [CENTRO-07-ST24-FEDER-002033]; QREN; Mais Centro-PORC; EU/ERDF
funding text This work was partly funded by the Portuguese Wildlife Society and projects SafeSea EEA-Grants and European Commission's Life Programme (MarPro NAT/PT/00038). This study was also partly supported by the Portuguese Foundation for Science and Technology (FCT) with grants SFRH/BD/51416/2011 to L. Nicolau, SFRH/BPD/64889/2009 to A. Marcalo and SFRH/BD/30240/2006 to M. Ferreira. C. Eira is supported by MARES (CENTRO-07-ST24-FEDER-002033), QREN, Mais Centro-PORC and EU/ERDF. The authors thank all volunteers, technicians, maritime authority officers and fishermen who contributed to this work. The authors would like to thank all the suggestions made by Dr. Fred Wrona and by two anonymous referees.
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publisher SPRINGER HEIDELBERG
publisher city HEIDELBERG
publisher address TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
issn 0025-3162
29-character source abbreviation MAR BIOL
iso source abbreviation Mar. Biol.
publication date JAN
year published 2016
volume 163
issue 1
article number 21
digital object identifier (doi) 10.1007/s00227-015-2783-9
page count 13
web of science category Marine & Freshwater Biology
subject category Marine & Freshwater Biology
document delivery number DC5EH
unique article identifier WOS:000369243700006