• 한국수산과학회지
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• 제48권5호
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• pp.688-695
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• 2015

The objective of this study was to investigate the effects of bio-floc system that is composed of effective microorganisms (EM) on the microbial composition and water qualities in rearing water and the growth of Chinese white shrimp, Fenneropenaeus chinensis. To investigate the microbial composition according to the bio-floc levels, the study was conducted at 100 and 150% of bio-floc after 5 and 10 days in bio-floc system. The results showed that total bacteria count (TBC) and the counts of Latobacillus sp., Bacillus sp. and Rhodobactor sp., were significantly decreased after 5 days in bio-floc system. To assess the growth of F. chinensis according to the concentrations of bio-floc, the study was conducted at the bio-floc concentrations; 0 (control), 60, 80, 100, 120 and 140% of the prepared bio-floc for 90 days. The growth factors such as daily length and weight gain were considerably increased at the concentrations of bio-floc 100, 120, and 140% after 90 days. As water quality indicators, the values of total-N, NH₄⁺-N and PO₄^--P were analyzed, and they were significantly decreased at 120 and 140% of bio-floc, compared to the control. The results demonstrated that combination of EM showed the synergic effect on removing N and P.

• 한국식품위생안전성학회지
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• 제38권6호
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• pp.496-507
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• 2023

본 연구는 대한민국 온라인 시장에서 판매되는 48개의 새우 제품의 종판별 및 제품 표시 사항 일치 여부를 조사하였다. 사용 원재료의 종 판별을 위해 cytochrome c oxidase subunit I 유전자의 염기서열을 분석하여 NCBI GenBank 및 BOLD system 데이터베이스에 등록된 생물종의 염기서열과 비교하였다. 또한 계통분석을 수행하여 동정된 새우종을 추가로 검증했다. 종판별 결과 총 16종[흰다리새우(Penaeus vannamei, Whiteleg shrimp or Pacific white shrimp), 북쪽분홍새우(Pandalus borealis, Alaskan pink shrimp), 그라비새우(Palaemon gravieri, Chinese ditch prawn), 돗대기새우(Leptochela gracilis, Lesser glass shrimp), 얼룩새우(Penaeus monodon, Giant tiger prawn), 아르헨티나붉은새우(Pleoticus muelleri, Argentine red shrimp), 산모양깔깔새우(Metapenaeopsis dalei, Kishi velvet shrimp), 태평양난바다곤쟁이(Euphausia pacifica, Isada krill), 가시배새우(Lebbeus groenlandicus, Spiny lebbeid), 꽃새우(Trachypenaeus curvirostris, Southern rough shrimp), 진흙새우(Argis lar, Kuro shrimp), 가시발새우(Metanephrops thomsoni, Red-banded lobster), 깔깔새우(Metapenaeopsis barbata, Whiskered velvet shrimp), 긴발딱총새우(Alpheus japonicus, Japanese snapping shrimp), 대하(Penaeus chinensis, Fleshy prawn), 긴뿔민새우(Mierspenaeopsis hardwickii, Spear shrimp)]이 확인되었으며, 흰다리새우(n=22, 45.8%)가 가장 큰 비중을 차지하였다. 일반명 '새우'를 포함하는 35개 제품(72.9%)에서 표시사항과 불일치를 나타내었으며, 일반명(n=30)을 제외할 경우 불일치율은 10.4%로 낮아졌다. 가공 정도별 불일치율은 다중 가공 제품(n=25, 89.3%)이 단순 가공 제품(n=10, 50%)보다 높은 비율을 보였다. 원산지별 분석 결과 특정 국가와 불일치율과의 상관성은 확인할 수 없었다. 본 연구 결과는 향후 새우 제품의 모니터링 수행 및 새우의 국명 표시 개선을 위한 기초자료로 쓰일 수 있을 것이다.

• 한국어병학회지
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• 제35권1호
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• pp.129-133
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• 2022

The full genome sequence of a Korean white spot syndrome virus (WSSV, isolate: WSSV-GoC18) is presented here. We obtained a total of 12,320,554 reads with 291,172 bases, 170 gene, and 170 coding DNA sequence, which were assembled in 1 contig. Phylogenetic analysis revealed that the WSSV-GoC18 was closely related to Chinese isolate (WSSV-PC) and distinctly different with previously reported a Korean isolate (WSSV K-LV1). The complete genome sequence of WSSV isolates will be of great help in molecular epidemiological studies, contributing to molecular diagnosis and disease prevention in shrimp aquaculture.

• ALGAE
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• 제19권1호
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• pp.7-14
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• 2004

Blue-Min was initially developed as an adsorbent for harmful gas removal and recently improved to apply to livestock, agriculture and aquaculture as an assistant feed. In the Blue-Min treatment, growth of harmful algae (Cochlodinium polykrikoides and the others causing the red-tide in the ocean) were inhibited below 10% in comparison with control and coagulation removal of harmful alge with Blue-Min treatment was more efficient than that of yellow loess treatment. It would be expected that the Ble-Min can be useful for the extirpator against the red-tide organisms and restrain the toxic algal growth around the fish aquaculture using the assistant feed. Recently, its utility has become to be diverse as it was revealed that aquaculture productivity increase by its application and, in addition, that it improve the water quality or sediment conditions in the aquaculture of Chinese White Shrimp. When Blue-Min was treated with the proper dose, the growth inhibition of Microcystis aeruginosa and lsochrysis galbana, which are typical red-tide organisms in freshwaters and food organisms in aquaculture, respectively, were less than that of marine red-tide organisms, while their growth slightly increased with low concentration treatiment. In addition, polyunsaturated fatty acids (PUFA) content of I. galbana slightly increase with the Blue-Min treatment. Through our research, the Blue-Min has diverse and comples function against various biological organisms and is proved as a biological activator or depressor.