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논문 기본 정보

자료유형
학술저널
저자정보
김성한 (군산대학교)
저널정보
한국수산해양교육학회 수산해양교육연구 수산해양교육연구 제29권 제3호 (통권 제87호)
발행연도
2017.6
수록면
702 - 710 (9page)
DOI
10.13000/JFMSE.2017.29.3.702

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초록· 키워드

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Recently, in many reptiles (14 genera of turtles in five families), common characteristics of incubation temperatures are known to determine the sexes of hatchlings in many species of turtles, including the map turtles, painted turtles and snapping turtles, emys turtle, etc. According to many researcher"s reports, in general, incubation at 25℃ (cooler temperatures) produces all or mostly males, however, incubation at 31℃ (higher temperatures) or higher produces all or mostly females. Exceptionally, even cooler temperature (20℃) produce females, they produced all or mostly females. Accordingly, it is well-known that incubation temperature is the sex determining agent in these turtles. However, this paper presents study of the sex ratio and nest ecology in natural spawning nest: Observations on hatching sex ratios of eggs collected from natural nests of T. sinensis are similar to a previous report of the same genus Trionyx in the soft-shelled turtles. However, this genus (or species) showed some different phenomena to other kinds of turtles such as various kinds turtles mentioned above. After collection of naturally spawned eggs (17 eggs of T. sisnensis) on the natural nests, a laboratory experiment by the constant incubation temperatures was conducted with natural fluctuating soil temperatures in the natural nest with the soft-shelled turtle, T. sinensis. And also laboratory experiments were conducted using constant incubation temperatures of 25℃ (cooler temp.) and 30℃ (higher temp.) with the turtle, T. sinensis. Exceptionally, it was confirmed that the first and second incubation temperatures can"t control sex-determination in the freshwater soft-shelled turtle, T. sinensis. The sex ratio approximated 1:1 (χ<SUP>2</SUP> = 0.06, P>0.05 (the Ist experiment). And the sex ratio approximated 1:1 independently of incubation temperature (χ<SUP>2</SUP> = 0.33, P>0.05 (the 2nd experiment). Consequently, temperature has no effect on sex determination in the genus Trionyx in a soft-shelled turtle.

목차

Abstract
Ⅰ. 서론
Ⅱ. 재료 및 방법
Ⅲ. 결과 및 고찰
Ⅳ. 결론 및 요약
References

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