Thermosensitive period for sex determination of the tropical freshwater turtle Malayemys macrocephala
| Autor: | Rangsima Pewphong, Noppadon Kitana, Jirarach Kitana |
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| Rok vydání: | 2020 |
| Předmět: |
Male
0106 biological sciences Embryo Nonmammalian Sex Differentiation Period (gene) Embryonic Development Zoology 010603 evolutionary biology 01 natural sciences Animals 0501 psychology and cognitive sciences Malayemys macrocephala 050102 behavioral science & comparative psychology Gonads Incubation biology Hatching 05 social sciences Embryogenesis Temperature Turtle (syntax) biology.organism_classification Turtles Incubation temperature Female Animal Science and Zoology Development of the gonads |
| Zdroj: | Integrative Zoology. 16:160-169 |
| ISSN: | 1749-4877 |
| DOI: | 10.1111/1749-4877.12479 |
| Popis: | Many egg-laying reptiles possess temperature-dependent sex determination (TSD) in which outcome of gonadogenesis is determined by incubation temperature during a temperature-sensitive period of development. Prior studies on Malayemys macrocephala showed that incubation temperatures influence gonadal development and suggested that M. macrocephala exhibits TSD. However, information on the temperature-sensitivity period in this species was unknown until the current study. Turtle eggs were collected from rice fields in central Thailand from December 2016 to February 2017. In the laboratory, eggs were incubated at male-biased temperature (26 °C) and shifted to female-biased temperature (32 °C), or vice versa. Single shift experiments were performed systematically during embryonic stages 13-21. After hatching, sex of individual turtles was determined by histological analysis. We found that the sex determination of M. macrocephala is affected by temperature up to stage 16 of embryonic development. |
| Databáze: | OpenAIRE |
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