Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Preference of Physical Microhabitat on the $1^{st}$-class Endangered Species, Gobiobotia naktongensis inhabiting the Gam Stream, Tributary of the Nakdong River

  • Seo, Jin-Won (Korea Institute of Water and Environment, K-water) ;
  • Kim, Hee-Sung (Korea Institute of Water and Environment, K-water) ;
  • Yi, Hye-Suk (Korea Institute of Water and Environment, K-water) ;
  • Jeong, Sun-A (Korea Institute of Water and Environment, K-water)
  • Published : 2009.12.31
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Abstract

The study was conducted in 2007~2008 in order to understand preference of physical microhabitat on the $1^{st}$-class endangered species, Gobiobotia naktongensis inhabiting the Gam Stream, tributary of Nakdong River. The total number of fish caught from the study sites was 3,671 representing 7 families 24 species. There were 8 Korean endemic species including Odontobutis platycephala, and 2 introduced species (Carassius cuvieri, Micropterus salmoides) were found. According to investigation and analysis of physical microhabitat on Gobiobotia naktongensis caught in the Gam Stream, a total of 57 individuals were found at shallow depth (0.14~0.46 m) and run (0.239~0.585m $sec^{-1}$). As a result of sieve analysis, stream beds consisted of about 1% gravel and 99% sand (83.4% coarse sand, 15.6% find sand). Therefore, Gobiobotia naktongensis seemed to inhabit shallow-run with coarse sand bed than deep-pool microhabitat. The findings indicate preference of physical microhabitat on Gobiobotia naktongensis, and it is important to enhance efficiency of fish conservation and ecological restoration with understanding species-specific characteristics in microhabitat including protected species.

Keywords

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