• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.120-121
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• 2000

Krill(Euphausia superba Dana)은 무한한 잠재적 자원량으로써 미래 식량자원으로 주목받고 있다. 막대한 자원량에 비해 연구가 부족하고 새로운 먹거리 및 훌륭한 단백질 공급원으로서 여러가지 가공식품으로의 개발이 시급하다. 주로 게·새우 등의 갑각류에 다량 함유되어 있는 키틴은 지구상에서 cellulose다음으로 풍부한 천연자원이다. (중략)

• Resources Recycling
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• v.2 no.2
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• pp.16-21
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• 1993

This study was carried out to investigate the settling characteristics of Fe(II) and Fe(III) hydroxide precipitates formed by pH adjustment of aqueous solution to remove ferrous and ferric ion in waste water. The results obstained in this study are as fellows : The settling rate was effectively increased with increasing the pH values of aqueous solution regulated by CaO and with increasing the amount of flocculant, on the other hand, application of excess flocculants decreased the settling rate. It is desirable that the concentration of iron ion is kept under $10^{-2}$ mol/ㅣ because the settling rate was decreased with increasing the concentration of iron hydroxide precipitates.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.5
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• pp.590-597
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• 2022

We analyzed the diet composition of smallmouth argentine Argentina kagoshimae, which were collected via bottom trawl in the South Sea during February, April, August, and October 2021. Their size range was 8.1-21.4 cm total length. A. kagoshimae are mesopelagic carnivores, mainly consuming benthopelagic Euphausiacea and Caridea crustaceans. Polychaetes were the second largest prey component in their diet, which also included small quantities of copepods, amphipods, and arrow worms. Stomach content compositions substantially differed among body size levels in A. kagoshimae. The results of non-metric multidimensional scaling ordination and permutational multivariate analysis of variance of dietary data revealed no significant dietary differences. The results of a graphical analysis of the diet composition showed that A. kagoshimae are specialized feeders characterized by strong individual feeding specialization.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.58 no.1
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• pp.39-48
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• 2022

Using environmental DNA (eDNA) in the fisheries and oceanography fields, research on the diversity of biological species, the presence or absence of specific species and quantitative evaluation of species has considerably been performed. Up to date, no study on eDNA has been tried in the area of fisheries acoustics in Korea. In this study, the biomass of a dominant species in the northwestern waters of Jeju Island was examined using 1) the catch ratio of the species from trawl survey results and 2) the ranking ratio of the species from the eDNA results. The dominant species was Zoarces gillii, and its trawl catch ratio was 68.2% and its eDNA ratio was 81.3%. The Zoarces gillii biomass from the two methods was 7199.4 tons (trawl) and 8584.6 tons (eDNA), respectively. The mean and standard deviation of the acoustic backscattering strength values (120 kHz) from the entire survey area were 135.5 and 157.7 m²/nm², respectively. The strongest echo signal occurred at latitude 34° and longitude 126°15' (northwest of Jeju Island). High echo signals were observed in a specific oceanographic feature (salinity range of 32-33 psu and the water temperature range of 19-20℃). This study was a pilot study on evaluating quantitatively aquatic resources by applying the eDNA technique into acoustic-trawl survey method. Points to be considered for high-quality quantitative estimation using the eDNA to fisheries acosutics were discussed.

• Proceedings of the Korean Aquaculture Society Conference
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• 2006.05a
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• pp.241-242
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• 2006

• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.370-371
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• 2004

• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.65-66
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• 2004

• 어항어장
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• s.27
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• pp.56-59
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• 1994

최근 UR협정의 타결로 우리나라의 수산업은 새로운 전환점을 맞고 있다. 영세하고 마구잡이식의 원시적인 어업은 스스로 도태될 수 밖에 없고, 경쟁력이 있는 것만이 생존할 수 밖에 없게 되었다. 즉 자원절약적이고 비환경파괴적인 수산업의 중요성이 강조되고 있는 것이다.

• Proceedings of the Fisheries Business Administration Society of Korea Conference
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• 2011.07a
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• pp.73-104
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• 2011

• 어항어장
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• s.75
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• pp.35-43
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• 2006

어업인들이 대부분 정부에서 수산자원 회복을 위하여 시급하게 하여야 할 사업으로 침체어망 인양사업 등을 요구하고 있으며 수거에 따른 경제성을 고려해 볼 때 침체어망 인양사업과 해양폐기물 수거사업을 확대 운영하여야 한다.