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A tropical oviparous lizard, Calotes versicolor , exhibiting a potentially novel FMFM pattern of temperature‐dependent sex determination by Laxmi S. Inamdar (Doddamani); Vani V.; Polani B. Seshagiri is a Environmental Science article available to read on EtoBox.

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## Abstract Among squamate reptiles, lizards exhibit an impressive array of sex‐determining modes viz. genotypic sex determination, temperature‐dependent sex determination, co‐occurrence of both these and those that reproduce parthenogenetically. The oviparous lizard, __Calotes versicolor__, lacks heteromorphic sex chromosomes and there are no reports on homomorphic chromosomes. Earlier studies on this species presented little evidence to the sex‐determining mechanism. Here we provide evidences for the potential role played by incubation temperature that has a significant effect (__P__<0.01) on gonadal sex and sex ratio. The eggs were incubated at 14 different incubation temperatures. Interestingly, 100% males were produced at low (25.5±0.5°C) as well as high (34±0.5°C) incubation temperatures and 100% females were produced at low (23.5±0.5°C) and high (31.5±0.5°C) temperatures, clearly indicating the occurrence of TSD in this species. Sex ratios of individual clutches did not vary at any of the critical male‐producing or female‐producing temperatures within as well as across the seasons. However, clutch sex ratios were female‐ or male‐biased at intermediate temperatures. Thermosen

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Author

Laxmi S. Inamdar (Doddamani); Vani V.; Polani B. Seshagiri

Publisher

Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1932-5223)

Published

2011

Language

EN

Field

Environmental Science (Life Sciences)