Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Influence of Farming Practices on Weight-Length Relationship of the Loach (Misgurnus anguillicaudatus) Population in Rice Paddy Fields

영농방법이 논에 서식하는 미꾸리 개체군의 체중-체장 관계에 미치는 영향

  • 김명현 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 최순군 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 어진우 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 권순익 (농촌진흥청 국립농업과학원 기후변화생태과) ;
  • 송영주 (농촌진흥청 국립농업과학원 기후변화생태과)
  • Received : 2017.06.20
  • Accepted : 2017.09.22
  • Published : 2017.12.31
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Abstract

The length frequency and weight-length relationships within the loach population of Misgurnus anguillicaudatus were investigated in environment-friendly (EFP) and conventional paddy fields (CP) in South Korea, in order to identify the influences of farming practices to the loach population living in paddy ecosystem. The size-frequency of distribution of M. anguillicaudatus populations noted to differ significantly when the loach populations of the EFP and the CP were compared. The mean weight and length of the loach population in EFP was greater than those of the loaches in CP. The equations based on weight and total length relationship in EFP and CP were $W=0.000004L^{3.0747}$ and $W=0.000002L^{3.2106}$, respectively. The condition factor (K) against total length of loaches at two paddy field types with different farming practices indicates that the loach population in EFP(mean K=0.95) had access to better nutritional conditions than those in CP (mean K=0.67). It therefore appears that the size and structure of loach populations in rice paddy fields might be affected by farming practices.

친환경농법과 관행농법으로 대별되는 영농방법이 논 생태계에 서식하는 미꾸리 개체군에 미치는 영향을 파악하기 위하여 2014년 9월에 친환경 논과 관행 논에서 미꾸리망을 이용하여 미꾸리 개체군의 빈도분포 및 무게-길이 상관관계를 조사하였다. 그 결과 채집된 전체 미꾸리의 발육단계별 개체수 빈도분포는 큰 차이를 나타냈다. 미꾸리의 무게와 길이의 평균값은 친환경 논이 관행 논보다 큰 것으로 나타났지만, 범위는 관행 논이 높게 나타났다. 무게-길이 상관관계식은 친환경 논과 관행 논에서 각각 $W=0.000004L^{3.0747}$, $W=0.000002L^{3.2106}$으로 나타났다. 평균 비대지수(K)는 친환경 논이 0.95로 관행 논 0.67보다 높게 나타났다. 결과적으로 영농방법이 논에 서식하는 미꾸리 개체군의 발육에 영향을 미치는 것으로 파악되었다.

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References

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