Recent advances on the estimation of the thermal reaction norm for sex ratios

PeerJ

article

F. Alberto Abreu-Grobois¹  B. Alejandra Morales-Mérida²  Catherine E. Hart⁵  Jean-Michel Guillon⁴  Matthew H. Godfrey⁷  Erik Navarro¹  Marc Girondot⁴ 

[1] Laboratorio de Genética y Banco de Información sobre Tortugas Marinas ,(BITMAR), Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México;Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala;Doctorado en Ciencias Naturales para el Desarrollo ,(DOCINADE), Instituto Tecnológico de Costa Rica ,(TEC), Universidad Nacional ,(UNA), Universidad Estatal a Distancia;Laboratoire Écologie, Systématique, Évolution, Université Paris Saclay, Centre National de la Recherche Scientifique;Grupo Tortuguero de las Californias A.C.;Investigación;North Carolina Wildlife Resources Commission;Duke Marine Laboratory, Nicholas School of the Environment, Duke University;Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University

关键词: Temperature-dependent sex determination;    Sex ratio;    TSD;    Reaction norm;    Marine turtles;    Incubation;    Eggs;    Olive ridley;    Lepidochelys olivacea;    Reptile;   

DOI  :  10.7717/peerj.8451

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Temperature-dependent sex determination, or TSD, is a widespread phenomenon in reptiles. The shape of the relationship between constant incubation temperature and sex ratio defines the TSD pattern. The TSD pattern is considered a life-history parameter important for conservation because the wider the range of temperatures producing both sexes, the more resilient the species is to climate change impacts. We review the different published equations and methodologies that have been used to model TSD patterns. We describe a new flexible model that allows for an asymmetrical pattern around the pivotal temperature, which is the constant temperature producing both sexes in equal proportions. We show that Metropolis-Hastings with Markov chain produced by a Monte Carlo process has many advantages compared to maximum likelihood and is preferred. Finally, we apply the models to results from incubation experiments using eggs from the marine turtle Lepidochelys olivacea originating in Northeast Indian, East Pacific, and West Atlantic Regional Management Units (RMUs) and find large differences in pivotal temperatures but not in transitional ranges of temperatures.

【 授权许可】

CC BY