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=0.000004L3.0747 and W=0.000002L3.2106, 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.

서 론
 재료 및 방 법
 결과 및 고 찰
  1. 크기별 빈도 분포
  2. 무게-길이 상관관계
 적 요
 REFERENCES

• 김명현(농촌진흥청 국립농업과학원 기후변화생태과, National Institute of Agricultural Sciences, RDA) | Myung-Hyun Kim Corresponding author
• 최순군(농촌진흥청 국립농업과학원 기후변화생태과, National Institute of Agricultural Sciences, RDA) | Soon-Kun Choi
• 어진우(농촌진흥청 국립농업과학원 기후변화생태과, National Institute of Agricultural Sciences, RDA) | Jinu Eo
• 권순익(농촌진흥청 국립농업과학원 기후변화생태과, National Institute of Agricultural Sciences, RDA) | Soon-Ik Kwon
• 송영주(농촌진흥청 국립농업과학원 기후변화생태과, National Institute of Agricultural Sciences, RDA) | Young-Ju Song