한국환경생태학회지 (Korean Journal of Environment and Ecology)

  • 제25권6호
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  • Pages.878-886
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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

봉화군의 어류상과 열목어(Brachimystax lenok tsinlingensis) 개체군의 특성

The Characteristic of Fish Fauna and Brachimystax lenok tsinlingensis Individuals in the Bonghwa-gun, Korea

  • 투고 : 2011.10.17
  • 심사 : 2011.12.01
  • 발행 : 2011.12.31
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초록

2010년 6월부터 2011년 5월까지 봉화군 7개 지점에서 어류상과 열목어 개체군 특징을 조사하였다. 조사 기간 동안 출현한 어종은 총 7과 15종 957개체 이었다. 출현한 어종 중 법적보호종에 속하는 종은 Brachymystax lenok tsinlingensis, Koreocobitis naktongensis, Cottus koreanus 등 3종 이었다. 고유종에 속하는 종은 Microphysogobio yaluensis, Coreoleuciscus splendidus, Zacco koreanus, Cobitis hankugensis, K. naktongensis, Iksookimia longicorpus, Niwaella multifasciata, Liobagrus mediadiposalis, C. koreanus, Coreoperca herzi 등 10종으로 고유화빈도가 66.7% 이었다. 우점종은 Z. koreanus(St. 1), B. lenok tsinlingensis(St. 3, 4, 5), Rhynchocypris oxycephalus(St. 2, 6, 7) 등 이었다. 열목어 전장과 체중의 관계식은 BW = 0.000008TL3.02 이었고 비만도는 평균 0.84 이었다. 전장이 80~180mm에 해당하는 개체는 만 1년생, 200~300mm는 만 2년생, 300mm 이상은 만 3년생 이상으로 추정되었다. 보호수역 내에서 열목어는 밀도는 100$m^2$ 당 평균 17 개체가 서식하는 것으로 조사되었고 보호수역 내에는 총 4,760개체가 서식하는 것으로 추정되었다.

The fish fauna and characteristic of population of Brachymystax lenok tsinlingensis at the 7 stations in the Bonghwa-gun were investigated from June 2010 to May 2011. The collected species during the survey period were 15 species belong to 7 families. Protected species by the legal were B. lenok tsinlingensis, Koreocobitis naktongensis, and Cottus koreanus. Korean endemic species were Microphy sogobio yaluensis, Coreoleuciscus splendidus, Zacco koreanus, Cobitis hankugensis, K. naktongensis, Iksookimia longicorpa, Niwaella multifasciata, Liobagrus mediadiposalis, C. koreanus, and Coreoperca herzi, which showed a ration of 66.7% in collected species. Dominant species were Z. koreanus(St. 1), B. lenok tsinlingensis(St. 3, 4, 5), and Rhynchocypris oxycephalus(St. 2, 6, 7). Length-weight relation in the population of B. lenok tsinlingensis was BW = $0.000008TL^{3.02}$, and condition factor in the population was average 0.84. Frequency analysis of total length indicated that the group 80~180 mm in total length is represented by one-year-old individuals, the group 200~300 mm by two-year-old individuals, and the group over 300 mm by three-year-old individuals. The density of population was presumed average 17 individuals per 100$m^2$ and total 4,760 individuals in the reservation for B. lenok tsinlingensis.

키워드

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