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ISSN : 1226-9999(Print)
ISSN : 2287-7851(Online)
Korean Journal of Environmental Biology Vol.35 No.4 pp.446-451

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

Myung-Hyun Kim,Soon-Kun Choi,Jinu Eo,Soon-Ik Kwon,Young-Ju Song


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.

영농방법이 논에 서식하는 미꾸리 개체군의 체중-체장 관계에 미치는 영향