Highly feminised sex-ratio estimations for the world’s third-largest nesting aggregation of loggerhead sea turtles
2019; Inter-Research; Volume: 621; Linguagem: Inglês
10.3354/meps12963
ISSN1616-1599
AutoresCE Tanner, Adolfo Marco, Samir Martins, Elena Abella‐Perez, LA Hawkes,
Tópico(s)Bird parasitology and diseases
ResumoMEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 621:209-219 (2019) - DOI: https://doi.org/10.3354/meps12963 Highly feminised sex-ratio estimations for the world's third-largest nesting aggregation of loggerhead sea turtles Claire E. Tanner1, Adolfo Marco2,3, Samir Martins2, Elena Abella-Perez2, Lucy A. Hawkes4,* 1University of Exeter, College of Life and Environmental Sciences, Penryn Campus, Cornwall TR10 9FE, UK 2BIOS.CV, Rua Milagro, Sal Rei, Boa Vista, Cape Verde 3Estacion Biologica de Donana, Consejo Superior de Investigaciones Científicas (CSIC), C Americo Vespuccio, 41092 Sevilla, Spain 4University of Exeter, College of Life and Environmental Sciences, Hatherley Laboratories, Streatham Campus, Exeter, Devon EX4 4PS, UK *Corresponding author: l.hawkes@exeter.ac.uk ABSTRACT: Despite being a fundamental life-history character, there is a paucity of population-wide, data-driven studies of primary sex ratios for any marine turtle species. The Republic of Cape Verde hosts the third-largest nesting population of loggerhead turtles Caretta caretta in the world (hosting up to 15% of global nesting by the species). Weighting for the spatial distribution of nests, we estimate that 84% of female hatchlings are currently likely produced across the population, with 85% of nests laid on Boa Vista, where incubation temperatures are coolest. In future climate change scenarios (by 2100), irrespective of beach, island or sand colour, sex ratios reach over 99% female, and 3 islands (Fogo, Sao Nicolau, Santiago) would cease to produce males, with >90% of nests incubating at lethally high temperatures. Given that most of the population cannot move to nest on cooler islands, we highlight that temporal refugia are amongst the primary means available to this population to adapt. Under a low-emissions scenario, without phenological adaptation, there would only be an estimated 0.14% males produced across the whole population, while under mid- and high-emissions scenarios, male production may cease on most islands. KEY WORDS: Climate change · Sex ratio · Caretta caretta · Loggerhead turtle · Marine turtle · Cape Verde Full text in pdf format PreviousNextCite this article as: Tanner CE, Marco A, Martins S, Abella-Perez E, Hawkes LA (2019) Highly feminised sex-ratio estimations for the world's third-largest nesting aggregation of loggerhead sea turtles. Mar Ecol Prog Ser 621:209-219. https://doi.org/10.3354/meps12963 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 621. Online publication date: July 04, 2019 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2019 Inter-Research.
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