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서해안 천수만 일대 양식 조피볼락(Sebastes schlegeli)의상피 선충 감염현황
서한길 ( Han Gill Seo ),서정수 ( Jung Soo Seo ),류민경 ( Min Kyung Ryu ),이은혜 ( Eun Hye Lee ),권세련 ( Se Ryun Kwon ),강종순 ( Jong Soon Kang ),노윤산 ( Yun San No ),최혜승 ( Hye Sung Choi ),정승희 ( Seung Hee Jung ),한현자 ( Hy 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5
We investigated a nematode infection in the epithelial tissue of rockfish Sebastes schlegeli cultured in Cheonsu Bay, western Korea, from May 2013 to April 2014. Nematodes infected the epithelial tissues of various external organs, including the fins, operculum, nares, mouth, and head. Over a 1-year period, the overall nematode infection rate in rockfish was 55% (n=89/163): 56.7% (n=17/30) in May 2013, 88% (n=29/33) in August 2013, 0% (n=0/30) in October 2013, 70% (n=21/30) in January 2014, and 55% (n=22/40) in April 2014. During this study, the only massmortality of cultured rockfish in Cheonsu Bay was in August 2013, when we identified skin wounds on the rockfish caused by the nematodes escaping from their hosts. During this period, the accumulated mortality for 2 weeks was1.4-22.4% in different farms. In addition, several pathogenic bacteria (Photo bacterium damselae, Vibrio spp., and Streptococcus iniae) were isolated from the moribund rockfish; these were thought to be transmitted through the skin wounds caused by the nematodes.