Temperature‐Dependent Sex Determination in Gekko japonicus (Gekkonidae, Reptilia): (temperature‐dependent sex determination/Gekko japonicus/sex differentiation/Reptilia)

SHOJI TOKUNAGA

研究成果: ジャーナルへの寄稿記事

25 引用 (Scopus)

抄録

The effects of temperature on sexual differentiation in early development of the gekkonid lizard, Gekko japonicus were studied. The eggs were collected within 24 hr after the oviposition and were incubated at 20, 24, 28 and 32°C. The number of eggs hatched was 14 at 24°C, 20 at 28°C and 21 at 32°C. Hatching never occurred at 20°C. The hatched lizards without Müllerian ducts were judged as males. The sex of all lizards with Müllerian ducts were identified histologically. The sex ratios, male/(male+female), were 0.07 at 24°C, 0.75 at 28°C and 0.24 at 32°C. The disparities of the sex ratio from 1/2 were statistically significant and differences in the sex ratio with various incubation temperatures were also significant. These sex ratios can probably be best interpreted by a temperature‐dependent sex determination. The different sex ratios do not seem to be related to a predetermination of sex with a differential mortality.

元の言語英語
ページ(範囲)117-120
ページ数4
ジャーナルDevelopment, Growth & Differentiation
27
発行部数2
DOI
出版物ステータス出版済み - 1985

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Sex Differentiation
Reptiles
Sex Ratio
Lizards
Eggs
Sex Preselection
Oviposition
Temperature
Mortality

All Science Journal Classification (ASJC) codes

  • Developmental Biology
  • Cell Biology

これを引用

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title = "Temperature‐Dependent Sex Determination in Gekko japonicus (Gekkonidae, Reptilia): (temperature‐dependent sex determination/Gekko japonicus/sex differentiation/Reptilia)",
abstract = "The effects of temperature on sexual differentiation in early development of the gekkonid lizard, Gekko japonicus were studied. The eggs were collected within 24 hr after the oviposition and were incubated at 20, 24, 28 and 32°C. The number of eggs hatched was 14 at 24°C, 20 at 28°C and 21 at 32°C. Hatching never occurred at 20°C. The hatched lizards without M{\"u}llerian ducts were judged as males. The sex of all lizards with M{\"u}llerian ducts were identified histologically. The sex ratios, male/(male+female), were 0.07 at 24°C, 0.75 at 28°C and 0.24 at 32°C. The disparities of the sex ratio from 1/2 were statistically significant and differences in the sex ratio with various incubation temperatures were also significant. These sex ratios can probably be best interpreted by a temperature‐dependent sex determination. The different sex ratios do not seem to be related to a predetermination of sex with a differential mortality.",
author = "SHOJI TOKUNAGA",
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N2 - The effects of temperature on sexual differentiation in early development of the gekkonid lizard, Gekko japonicus were studied. The eggs were collected within 24 hr after the oviposition and were incubated at 20, 24, 28 and 32°C. The number of eggs hatched was 14 at 24°C, 20 at 28°C and 21 at 32°C. Hatching never occurred at 20°C. The hatched lizards without Müllerian ducts were judged as males. The sex of all lizards with Müllerian ducts were identified histologically. The sex ratios, male/(male+female), were 0.07 at 24°C, 0.75 at 28°C and 0.24 at 32°C. The disparities of the sex ratio from 1/2 were statistically significant and differences in the sex ratio with various incubation temperatures were also significant. These sex ratios can probably be best interpreted by a temperature‐dependent sex determination. The different sex ratios do not seem to be related to a predetermination of sex with a differential mortality.

AB - The effects of temperature on sexual differentiation in early development of the gekkonid lizard, Gekko japonicus were studied. The eggs were collected within 24 hr after the oviposition and were incubated at 20, 24, 28 and 32°C. The number of eggs hatched was 14 at 24°C, 20 at 28°C and 21 at 32°C. Hatching never occurred at 20°C. The hatched lizards without Müllerian ducts were judged as males. The sex of all lizards with Müllerian ducts were identified histologically. The sex ratios, male/(male+female), were 0.07 at 24°C, 0.75 at 28°C and 0.24 at 32°C. The disparities of the sex ratio from 1/2 were statistically significant and differences in the sex ratio with various incubation temperatures were also significant. These sex ratios can probably be best interpreted by a temperature‐dependent sex determination. The different sex ratios do not seem to be related to a predetermination of sex with a differential mortality.

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