• 한국환경생태학회지
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• 제27권4호
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• pp.429-436
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• 2013

옥정호로 유입되는 37km의 추령천에는 육봉화된 은어의 이동을 가로막는 많은 보가 설치되어 있었으나 2006년 12월 옥정호 추령천 하류에는 은어가 성숙하기 위해 추령천 상류로 이동하도록 어도가 설치되었다. 따라서 2007년 4월부터 10월까지 13개 지점에서 어도와 은어의 성장률을 조사하였다. 그 결과 어도의 설치 후, 치어들은 강수량이 풍부했던 시기에만 소상할 수 있는 상류를 새로 설치된 어도를 통해서 자유롭게 상류로 이동할 수 있었다. 2007년 9월 산란시기 동안 성숙된 은어는 $163{\pm}21.5mm$로 어도가 설치되기 전인 2006년에 비해 약 13mm, 2004년 약 20mm, 2005년 약 57mm정도 더 크게 나타났다. 따라서 하천에서 어도는 육봉형 은어집단의 평균 크기와 생존력에 중요한 역할을 하는 것으로 확인되었다.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.99-100
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• 2001

Although cultured sweet smelt production recently have been rapidly increased from 89 metric tons (M/T) in 1997 to 500M/T In 1999 in Korea, wild fish have been still used as broodstock for cultured fish seed. This is considered due to having higher sperm and e99 qualify in wild fish broodstock than cultured fish. However, capturing a number of wild sweet smelt broodstock might lead to decreasing of the production of wild fish, In truth, of which production has been greatly decreased so that a number of artificial juvenile have been stocked some rivers in Korea. (omitted)

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.97-98
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• 2001

Alpha-tocopherol (alpha-Toc) is a classical lipophilic antioxidant well known as a scavenger of free radicals in a hydrophobic milieu. The primary function of alpha-Toc is to stabilize cellular and subcellar membrane by preventing peroxidative damage of structural polyunsaturated fatty acids (PUFA). The characteristic aroma of sweet smelt Precoglossun altivelis is known as oxida breakdown products of PUFA ironically. (omitted)

• Fisheries and Aquatic Sciences
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• 제4권4호
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• pp.163-170
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• 2001

The effect of perilla oil added in diet on the biochemical properties of cultured sweet smelt, Plecoglossus altivelis, was investigated. The cultured fish were fed two different diets for 8 weeks; a control diet was a commercial diet, which was low in the content of docosa­hexaenoic acid (DHA, 22: 6n-3) and eicosapentaenoic acid (EPA, 20: 5n-3) less than approximately $2\%$ (CO group) and an experimental diet (PO group) was added perilla oil as a lipid source in the diet of the CO group. The PO group was superior in growth rate and feed efficiency compared with CO group. This trend showed markedly in female of both groups. The fatty acid composition in the muscle of PO group was closely related with those of the diet, while those of CO group were not. For plasma components, total cholesterol (CHOU of PO group was higher than that of CO group. Thiobarbituric acid-reactive substances (TBARS), hydroxyl (OH) radical levels and superoxide dismutase (SOD) activity of plasma were higher in PO group than CO group. The intensity of watermelon-like or cucumber-like aroma was much stronger in PO group with higher level of TBARS and OH radical in plasma compared CO group. Survival rate was also high in PO group with high levels of phagocytic rate, CHOL and SOD activity. These results suggest that perilla oil might be usefulness as a lipid source of the cultured sweet smelt diet, in which result in high quality of the cultured fish.

• 한국수산과학회지
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• 제32권6호
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• pp.689-692
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• 1999

양식산 은어의 품질 향상을 위한 연구의 일환으로 섬진강과 밀양강에서 채포된 천연산과 하동과 밀양 소재의 양식장에서 구임한 양식산 은어의 근육 및 난에 대하여 일반성분 조성을 분석, 비교한 결과는 다음과 같다. 천연산 은어 근육의 수분함량은 $76.7\~77.5\%$, 단백질 $18.4\~19.9\%$, 지질 $2.41\~3.47\%$, 회분 $1.04\~1.33\%$으로 산지에 다른 차이가 거의 없었다. 양식산 은어 근육에서 단백질과 회분 함량은 천연산과 유사하였으나, 지질($4.68\~10.1\%$) 및 탄수화물($1.14\~2.82\%$) 함량은 천연산에 비하여 많았으나 수분 함량은 적었으며, 특히 지질 함량은 양식장에 따라 상당한 차이를 나타내었다. 따라서 양식장에 따른 일반성분 조성 차이는 그들의 사료 조성의 차이가 크게 기여한 것으로 볼 수 있었다. 또한 지질 함량은 거의 모든 시료에서 수컷에 비하여 암컷에서 약간 많은 경향을 보였다. 은어난의 일반성분 조성 중 지질, 단백질, 탄수화물 함량은 근육에 비하여 많았으나 수분 함량은 상대적으로 적었으며, 근육의 경우와 달리 산지 및 양식장에 따라 상당한 차이를 나타내었다. 시험된 모든 시료에서 지질과 수분 함량 사이에는 y= -0.2715x+24.903 (r= -0.7253, p<0.001)로 역의 상관관계를 나타내었다.

• Fisheries and Aquatic Sciences
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• 제7권1호
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• pp.1-9
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• 2004

Sweet smelt (Plecoglossus altivelis) were fed four different diets supplemented with either perilla oil $(2.0\%)$ rich in 18:3n-3 (CP), and perilla oil and Enteromorpha compressa meal $(2.0\%)$ (CPA), soybean oil rich in 18:2n-6 (CO), or soybean oil and algal meal (CA) for 4 weeks. The growth performance, fatty acid composition of muscle, plasma lipid peroxidation and blood components of the sweet smelt were then determined. The specific growth rate and feed efficiency in the fish fed the CPA diet were the highest, while the other groups showed similar results. The fatty acid composition of muscle in sweet smelt reflected the dietary lipids; 18:3n-3 was higher in the fish fed the CP and CPA diets, and 18:2n-6 was higher in the fish fed the CO and CA diets. The other fatty acid profiles presented almost no differences with respect to the diet composition. The fish fed the CA, CP and CPA diets contained significantly lower levels of triglyceride, thiobarbituric acid-reactive substances and hydroxyl radical in their plasma than that fed the CO diet. Phagocytic activity was the highest in the fish fed the CPA diet and higher in those of the fish fed the CP and CA diets compared to the CO diet group. The results from this study suggest that a dietary supplement of $2.0\%$ perilla oil together with $2.0\%$ E. compressa meal may improve the growth and health of cultured sweet smelt.

• Fisheries and Aquatic Sciences
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• 제4권4호
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• pp.171-179
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• 2001

The effect of $\alpha-Tocopherol\;(\alpha-Toc)$ level in diet on the biochemical property of sweet smelt, Plecoglossus altivelis, was investigated. The cultured sweet smelt fish were fed two different diets for 8 weeks; a control diet was added $0.01\%$ of $\alpha-Toc$ (CO group) and an experimental diet was added $1.00\%$ of $\alpha-Toc$ (HT group). Both diets were rich in docosahexaenoic acid (DHA, 22:6n-3) and eicosapentaenoic acid (EPA, 20:5n-3), accounting for $12.3-13.2\%$ and $12.1-12.4\%$, respectively. Growth rate (GR) and feed efficiency (FE) were almost no difference between both groups, but female fish of both groups were superior to male fish in GR and FE. Lipid contents of muscle and ovary were high in CO group compared with HT group, but that of testis showed a similar level in both groups. The proportion of polyunsaturated fatty acids (PUFA) in muscle showed almost no difference in sex and between both groups. In testes, the proportion of PUFA was 1.35 times for HT group to 1.54 times for CO group as much as in ovaries, in which was high approximately 1.5 times compared with muscle. Thiobarbituric acid-reactive substances (TBARS) and hydroxyl (OH) radical levels of plasma were higher in CO group than HT group and superoxide dismutase activity was also slightly high in the former. The intensity of watermelon-like or cucumber -like aroma was related positively with TBARS and OH radical levels in plasma. The level of triglyceride (TG) and total cholesterol (CHOL) in plasma of CO group was higher than those of HT group. Survival rate was high in CO group with higher level of TG and CHOL in plasma.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 추계 수산관련학회 공동학술대회발표요지집
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• pp.255-256
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• 2001

Ayu (or called sweet fish or sweet smelt), Plecoglossus altivelis, is a diadromous fish migrated from freshwater to brackish water to spawn, hatched larvae migrated go to seawater and then back to freshwater to grow. In Asia, it has very high consumers demand due to its good taste and Savor. However, population of this species is currently decreasing because of river pollution, over-fishing and dam construction. (omitted)

• Parasites, Hosts and Diseases
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• 제62권1호
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• pp.1-29
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• 2024

This article analyzed the infection characteristics of metacercariae of Metagonimus spp. (MsMc) in fish from 9 major water systems in Korea. A total of 19,568 fish in 87 species were examined over a period of 10 years (2011-2020). MsMc were detected in fish from all 44 survey areas in 9 water systems. Most of the surveyed sites showed very low and low infection levels (66.7%), while 33.3% of the areas, such as Tamjin-gang and Seomjin-gang, revealed moderate and high infection levels. High endemicity depends on the abundance of susceptible fish species, especially sweet smelt (Plecoglosus altivelis). The susceptibility index (SI) with MsMc in index fish, Zacco spp., was very low and low levels in 62.0%, moderate in 28.0%, and high in 10.0% regions. The SI was highest in the following order: Yeongam-cheon (283.8), Hoeng-cheon (192.3), Togyo-jeosuji (131.2), Deokcheon-gang (119.1), and Joyang-gang (106.3). The recent infection status of MsMc in P. altivelis was analyzed by the survey localities. In addition, except for P. altivelis, 9 fish species were highly infected with MsMc in some survey areas, including Zacco platypus, Z. koreanus, Z. temminckii, Opsariichthys uncirostris, Rhynchocypris oxycephalus, Carassius auratus, Acheilognathus rhombeus, Onchorhynchus masou, and Tribolodon hakonensis. In Korea, 74 fish species (15 families) are collectively listed as second intermediate hosts of Metagonimus spp. This review provides several novel characteristics of MsMc infection and clarifies the fish species of second intermediate host of Metagonimus spp. in this country.

• 한국생활과학회지
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• 제15권2호
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• pp.327-339
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• 2006

광주광역시와 전라남도 음식문화 주요 식품 재료의 종류를 확인하기 위하여 각 시군의 특산물을 농산물, 수산물, 축산물, 기타로 구분하여 조사한 결과는 다음과 같다. 현재 광주광역시와 전라남도의 특산물 중 농산물 51종, 수산물 50종, 축산물 6종, 기타 특산물 17종으로 총 124종 선정되어 있었다. 이 지역의 특산물 중에서 쌀, 오이, 배, 멸치, 굴, 김, 느타리버섯, 표고버섯 등은 여러 지역에서 특산물로 선정되어 있었다. 무등산수박, 무화과, 연어, 숭어, 메기 등의 특산물은 이들의 생산에 적합한 지리적 조건을 가진 지역에서만 생산되고 있었다. 농산물 중 밤호박, 파프리카, 키위, 벨론 등은 최근에 이 지역에서 재배하기 시작하였다. 수산물, 버섯류, 산채류는 자연산은 감소하는 반면 양식이나 인공재배가 증가하고 있었으며, 농산물과 축산물의 브랜드화도 급속히 이루어지고 있었다. 이상의 결과에서 이 지역의 음식문화와 관련된 식재료의 수급과 선택 가능성에 영향을 주는 특산물의 종류와 생산량이 환경오염과 국토개발 등 자연환경의 변화, 소비자의 기호변화, 건강에 대한 관심의 증가, 재배기술의 발달, 수산양식의 발달, 새로운 품종의 도입 등 여러가지 요인에 의하여 변화되고 있었다. 즉, 이 지역에서 식재료로 이용될 수 있는 다양한 농수산물이 생산되고 있으며, 음식문화가 계속 변화되어 가고 있음을 간접적으로 확인할 수 있었다.