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Title: Boosting female hatchling production in endangered, male-biased turtle populations
Authors: Eisemberg, Carla Camilo
Drummond, Glaucia M.
Vogt, Richard Carl
Keywords: Conservation Management
Endangered Species
Sex Determination
Sex Ratio
Temperature Effect
Amazon River
Mamiraua Sustainable Development Reserve
Podocnemis Sextuberculata
Issue Date: 2017
metadata.dc.publisher.journal: Wildlife Society Bulletin
metadata.dc.relation.ispartof: Volume 41, Número 4, Pags. 810-815
Abstract: In turtle species with temperature-dependent sex determination, hatchling sex ratios skewed toward males could threaten populations where females are vulnerable to harvest. We tested the efficiency of black plastic covers in producing more female hatchlings from nests of the six-tubercle Amazon River turtle (Podocnemis sextuberculata) at the Mamirauá Reserve, Amazonas, Brazil, during September to November 2003. Covered nests produced 37% more females and midnest average temperatures were 1° C higher than control nests. Incubation period was 3 days shorter, but survivorship was 12% lower in nests with black plastic. This technique could be an inexpensive, local alternative for short-term sex-ratio manipulation in endangered male-biased populations with temperature-dependent sex determination. © 2017 The Wildlife Society. © The Wildlife Society, 2017
metadata.dc.identifier.doi: 10.1002/wsb.821
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