Unusual sex-ratios and developmental mortality in the rice frog <i>Fejervarya kawamurai</i>
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- Miura Ikuo
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
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- Ohtani Hiromi
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
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- Fujitani Takeshi
- Higashiyama Zoo and Botanical Gardens Information
Bibliographic Information
- Other Title
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- Unusual sex-ratios and developmental mortality in the rice frog Fejervarya kawamurai
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Description
In the Japanese rice frog, Fejervarya kawamurai, we identified two unusual features of the sex ratio using artificial crosses at laboratory. Firstly, inbreeding such as sibling-sibling crosses, backcrosses, and diploid gynogenesis resulted in a male-biased sex ratio with a high rate of developmental mortality. Secondly, outbreeding reduced the mortality, and particularly outbreeding of females with males from a geographically separate population restored the sex ratio. Established mechanisms of genetic and environmental sex determination in vertebrates do not easily explain these results. Ecologically, this mechanism favors expanding populations that invade new habitat, because frogs must move continuously between populations to produce enough daughters and reduce embryonic mortality.
Journal
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- Chromosome Science
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Chromosome Science 18 (3-4), 53-57, 2015
THE SOCIETY OF CHROMOSOME RESEARCH
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Details 詳細情報について
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- CRID
- 1390001204568438912
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- NII Article ID
- 130005158720
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- NII Book ID
- AA11163057
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- ISSN
- 21850852
- 13441051
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- NDL BIB ID
- 027317281
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed