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 Mamirau a Reserve, Amazonas, Brazil, during September to November 2003. Covered nests produced 37% more females and midnest average temperatures were 18 C higher than cont… Show more
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