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http://dx.doi.org/10.14249/eia.2017.26.1.1

Biological Characteristics and Current Status of Nutria (Myocastor coypus) Introduced in Jeju Island  

Kim, Ga-Ram (Faculty of Science Education, Jeju National University)
Oh, Hong-Shik (Faculty of Science Education, Jeju National University)
Publication Information
Journal of Environmental Impact Assessment / v.26, no.1, 2017 , pp. 1-10 More about this Journal
Abstract
The study was carried out to understand the inhabiting status and biological features of nutria (Myocastor coypus) in the Jeju Island from May, 2013 to August, 2016. Five individuals were captured by traps and two individuals were collected in dead. Of the 7 individuals, those whose bio-information could not be known were excluded to perform autopsy of the rest of them. The results from morphological, cranial and anatomical analyses, it was found that the females achieved sexual maturation but had no breeding experience. An adult male showed similar sizes to those found in the Korean Peninsula. After collecting the 7 individuals in 2013, 1 nutria individual was filmed by the scouting camera in May, 2014 but not captured. The long-term investigation of the research area found no inhibiting individual. It is deemed the nutria was either died of natural death or migrated. In order to establish a proper nutria control, the environmental characteristics of Jeju Island should be considered where indigenous and introduced species coexist in a limited space. Our findings will provide helpful information for understanding biological features of nutria and planning protection program of natural ecosystems of Jeju Island.
Keywords
biological feature; inhabiting status; invasive species; Jeju Island; nutria;
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