Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Spatial Analysis of Ecological Characteristics of Zacco platypus Population in Lake Hoengseong Region

횡성호 일대에 분포하는 피라미(Zacco platypus) 개체군의 생태적 특성 분석

  • Received : 2012.05.21
  • Accepted : 2012.06.20
  • Published : 2012.06.30
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Abstract

In this study, ecological characteristics of Zacco platypus population in Lake Hoengseong region, including the up-and downstream in Lake, were investigated from April to November, 2010. The results compared with regional dynamics of Z. platypus population showed a dominant population among the other fish population, and also upstream has relatively high as 1,707 (78.70%) individuals than those of other sites. The regression coefficient (b) in relation to length-weight on Z. platypus population were 3.28 which appeared relatively a stabilized habitat condition in Lake Hoengseong region and 3.28 at the upstream and 3.10 in Lake Hoengseong and 3.09 at the downstream. Condition factor on Z. platypus population in Lake Hoengseong region showed stabilized population as 0.003 value, and especially the condition factors at the upstream were relatively higher than those at the downstream and Lake Hoengseong, indicate that Z. platypus population at the upstream displayed to be maintained as the most good condition in relation to trophic states. As a results of compared with body size on Z. platypus population, was investgated as highly distribute between 30~50mm and 70~90mm at upstream; 60~80mm in Lake Heongseong; 70~100mm at downstream, respectively. As a results, Z. platypus population at the upstream among Lake Hoengseong region displayed the most stabilized growth condition, and Z. platypus population were inhabitable in lotic and lentic environments based on good habitat condition.

본 연구는 횡성호 및 횡성호 상 하류지역을 대상으로 2010년 4월부터 2010년 11월까지 총 4회에 걸쳐 피라미(Zacco platypus) 개체군의 생태적 특성을 조사하였다. 피라미 개체군의 지역별 동태를 비교한 결과 상류지역에서 1,707개체(78.70%)로 가장 큰 개체군을 유지하고 있는 것으로 나타났다. 피라미 개체군의 전장-체중 상관도 분석 결과 횡성호 일대에 분포하는 피라미 개체군의 회귀계수 b값은 3.28로 비교적 안정적인 서식을 하고 있는 것으로 나타났으며, 지역별로는 상류지역 3.28, 횡성호 3.10, 하류지역 3.09로 상류지역에서 가장 양호한 생육상태를 나타내고 있었다. 비만도 지수는 slope가 0.003으로 안정적인 개체군을 형성하고 있는 것으로 나타났으며, 상류지역 0.003, 횡성호와 하류지역이 0.001로 상류지역에서 가장 양호한 영양상태를 유지하고 있었다. 피라미 개체군을 대상으로 전장크기를 비교한 전장빈도 분포 결과 상류지역은 30~50mm, 70~90mm 사이의 개체가 상대적으로 많이 나타났으며, 횡성호에서는 60~80mm의 개체, 횡성호 하류지역은 70~100mm의 개체가 비교적 풍부하게 분포하는 것으로 조사되었다. 결과적으로 횡성호 일대 피라미 개체군은 상류지역에서 가장 안정된 생육상태를 나타냈으며, 서식조건이 충족될 경우 유수역 및 정수역 모두를 선호하는 것으로 확인되었다.

Keywords

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