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Distribution Aspect and Extinction Threat Evaluation of the Endangered Species, Cottus hangiongensis (Pisces: Cottidae) in Korea  

Ko, Myeong-Hun (Division of Ecoscience, Ewhawonans University)
Han, Mee-Sook (Division of Ecoscience, Ewhawonans University)
Kwan, Sun-Man (National Institute of Biological Resources)
Publication Information
Korean Journal of Ichthyology / v.30, no.3, 2018 , pp. 155-160 More about this Journal
Abstract
The distribution aspect and extinction threat evaluation of the endangered species, Cottus hangiongensis were investigated from 2011 to 2017 in Korea for this study. The distribution reports of C. hangiongensis were divided into 1954~1985, 1981~2003, 2004~2012, and 2011~2017. The number of habited streams decreased gradually to 30, 24, 10, and 19 streams, respectively. In this study (2011~2017), C. hangiongensis was newly found in two streams (Ayajincheon and Chuksancheon), but 15 streams that appeared in the past are not in this study. The main habitat of C. hangiongensis was the downstream riffle of clean water with fast velocity and cobble-boulder bottoms. Given this evidence as noted for more than a 30% reduction in population after 2003, due to construction wear, river work and the qualitative decline of the habitat, C. hangiongensis is now considered to be Vulnerable (VU A2ac) based on the IUCN Red List categories and criteria.
Keywords
Cottus hangiongensis; distribution; endangered species; extinction threat evaluation;
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