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Age Structure Analysis of Kaloula borealis  

Ko, Sang-Beom (Dept. of Science Education, Jeju Univ.)
Lee, Jung-Hyun (National Institute of Environmental Research)
Oh, Hong-Shik (Dept. of Science Education, Jeju Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.25, no.6, 2011 , pp. 861-866 More about this Journal
Abstract
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.
Keywords
SKELETOCHRONOLOGY; ENDANGERED SPECIES; GROWTH CURVE;
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Times Cited By KSCI : 5  (Citation Analysis)
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