저서동물지수를 활용한 어류가두리 양식장의 건강도 평가 = Health Assessment of the Fish-cage Farms using BHI(Benthic Health Index)

다국어 초록 (Multilingual Abstract)

In this study, a health assessment was conducted using the Benthic Health Index (BHI) to assess fish cage farms, where a fishery environment assessment was also performed. A total of 43 farms were evaluated located in the East Sea, West Sea, and South Sea in Korea. The results of the BHI health evaluation included 8 grade 1 farms, 4 grade 2, 12 grade 3, and 19 grade 4. The grade 1 farms included sandy sediment farms and those with low intensity aquaculture, while the grade 2 farms included those located in areas with active seawater circulation. The fish cage farms belonging to grade 3 and 4 included the majority of farms with high-intensity aquaculture activities. There was no significant difference in total organic carbon between grade 3 and 4 farms, but the results of polychaete community analysis show that organic matter concentration was significantly higher in grade 4 farms.

국문 초록 (Abstract)

본 연구에서는 어장환경평가가 수행된 어류가두리 양식장의 조사 결과 중 일부를 대상으로 저서동물지수(Benthic Health Index, BHI)를 이용하여 양식장의 건강도를 평가하였으며, 평가 결과로 산출된 각 등급의 양식장 환경 특성을 파악하였다. 평가대상 어류가두리양식장은 동해, 서해, 남해에 위치한 43개 양식장으로, BHI 1등급은 8개 양식장, 2등급은 4개 양식장, 3등급은 12개 양식장, 4등급은 19개 양식장이 포함되었다. 1등급 어류가두리양식장은 사질 퇴적상, 양식강도가 낮은 양식장이 포함되었으며, 2등급 어류가두리양식장은 해수유통이 원활한 해역에 위치한 양식장이 속하였다. 3, 4등급이 속한 어류가두리양식장은 높은 강도로 양식 활동이 진행되고 있는 대다수의 양식장이 포함되었다. 3등급과 4등급의 양식장은 총유기탄소는 큰 차이가 없었으나, 다모류 군집분석의 결과는 4등급의 양식장에서의 유기물 농축이 더 높은 것으로 나타났다.

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