한국환경생태학회지 (Korean Journal of Environment and Ecology)

  • 제25권6호
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  • Pages.861-866
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  • 2011
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  • 1229-3857(pISSN)
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  • 2288-131X(eISSN)
한국환경생태학회 (Korean Society of Environment and Ecology)
권호 표지

맹꽁이(Kaloula borealis)의 나이구조 분석

Age Structure Analysis of Kaloula borealis

  • 투고 : 2011.10.09
  • 심사 : 2011.11.24
  • 발행 : 2011.12.31
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초록

우리는 제주도 대정읍에서 뼈나이테법(skeletochronology)을 사용하여 맹꽁이(Kaloula borealis)의 나이구조를 알아보았다. 조사는 번식기인 2009년 6월에 실시하였다. 측정된 개체수는 수컷이 38개체, 암컷이 58개체로 각 개체의 SVL(snout-vent length)과 체중을 측정하고 나이구조를 분석하였다. 수컷의 평균 SVL은 $43.69{\pm}3.44 mm$이며, 암컷은 $46.32{\pm}4.23mm$로 나타나고 있다. 첫 번식에 참여하는 수컷은 2살이고, 암컷은 3살로 나타났다. 가장 나이든 수컷은 8살이며 암컷은 10살이다. 그러므로 이 종의 수명은 수컷에서는 8살, 암컷에서는 10살 이상으로 볼 수 있으며 암수의 수명에서 암컷이 더 오래살고 있다. 또한 이 값은 통계적으로도 유의미하게 나타나고 있다. 성장곡선은 von Bertalanffy growth model을 사용하였으며, 성장계수(K)는 수컷이 0.56이며 암컷은 0.41이다. 최대성장크기는 수컷이 46.41 mm이며 암컷은 50.22 mm로 나타났다.

Using skeletochronology in the Daejung-eup, Jeju, we determined the age structure of Kaloula borealis. The study was performed during the breed season in June 2009. We measured the snout-vent length(SVL) and body weigth(BW) and analyzed the age structure of 38 male and 58 female frogs. The mean value of SVL is $43.69{\pm}3.44mm$ in males and $46.32{\pm}4.23mm$ in females. The age at first reproduction was estimated to be 2 years of age in males and 3 years in females. The oldest males and females were 8 and 10 years of age, respectively. Therefore, the longevity in this species was estimated to be more than 8 years for males and 10 years for females. So, females live longer than males. Also, this difference between the male and the female in age structure was significant. We estimated the growth curve for Kaloula borealis using von Bertalanffy growth model. The growth coefficient (K) was 0.56 in male and 0.41 in female. The asymptotic size was 46.41 mm in male and 50.22 mm in female.

키워드

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