• 수산경영론집
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• 제52권3호
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• pp.15-25
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• 2021

Base on the survey and financial statement on fish-paste processing company, this study aimed to estimate management efficiencies of fish-paste processing management using a data envelopment-analysis (DEA), In-depth interview and to find out their determinants. Model results show that the estimated mean management efficiencies obtained for the VRS and CRS DEA are 83.7% and 89.1%. In-depth interview results also show that efficiencies caused by scale of technical matter was greater than efficiencies caused by the scale of the company. Thus it implies that technical development is essential for achieving high-efficiency of fish-paste processing company more than expanding the size of company.

• 한국양식학회지
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• 제18권4호
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• pp.236-244
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• 2005

조피볼락(Sebastes schlegeli) 소형어와 중형어를 대상으로 MS-222와 lidocaine-HCl 마취농도에 따른 마취 및 회복시간과 혈액생리학적 반응, 생존율 등을 조사하여 마취효과를 비교하였다. 마취농도에 따른 마취시간은 MS-222와 lidocaule-HCl 모두에서 마취농도가 증가함에 따라 마취시간이 유의하게 감소하였다. 어체크기에 따른 마취시간은 소형어(평균전장 18.2$\pm$1.0cm, 평균체중 100.6$\pm$21.1 g)보다는 중형어(평균전장 14.2$\pm$0.9 cm, 평균체중 51.3$\pm$10.5 g)에서 길었다. 그러나 회복시간은 MS-222와 lidocaine-HCl 모두에서 농도가 증가함에 따라 회복시간이 길어졌다. 회복시간은 소형어보다는 중형어에서 더욱 짧았다. 마취농도에 바른 cortisol 농도는 MS-222 300 ppm에서 마취 6시간후 96.1$\pm$12.1 ng/ml로 가장 높은 값을 나타내었으나, 실험종료시까지 모든 실험구에서 실험 개시전 보다 높은 수준을 보였다. Lidocaine-HCl도 모든 실험구에서 실험 종료시까지 실험개시전보다 높은 값을 나타냈다. Glucose 농도는 소형어의 경우 MS-222 마취 1시간 후 $30.3{\pm}15.4{\~}69.5{\pm}23.2 mg/dl$로 다소 높았으나 마취 6시간 후에는 유의한 차이를 보이지 않았다. 중형어는 소형어 보다 다소 높은 농도를 나타내었으나 12시간 후에는 실험 개시전 수준으로 회복되었다. Lidocaine-HCl 경우는 MS-222와 비슷한 경향을 보였다. Na+ 농도는 모든 실험구에서 실험개시전과 차이를 나타내지 않았다. K+ 농도는 소형어에서 MS-222 마취 1시간후 $5.2{\pm}1.4{\~}6.7{\pm}1.2 mEq/L$의 범위로 유의하게 높았지만 마취 6시간후 실험 개시전 수준으로 회복되었다. 중형어는 유의한 차이를 보이지 않았다 Lidocaine-HCl의 경우, K+ 농도는 모든 실험구에서 실험 개시전과 차이를 나타내지 않았다. 삼투질 농도는 MS-222에서 $317.0{\pm}4.0{\~}362.0{\pm}12.9 mOsm/kg$의 범위를 보였으며, lidocaine-HCl의 경우에도 유사한 경향을 나타냈다. MS-222 마취에서는 모든 실험농도예서 lidocaine-HCl 마취에서는 300${\~}$400 ppm에서 $95\%$이상의 생존율을 나타냈다. 조피볼락의 소형어 및 중형어에 대한 마취제로서 MS-222와 lidocaine-HCl의 농도는 각각 100${\~}$200 ppm, 400 ppm이 적합할 것으로 판정된다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권11호
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• pp.1615-1622
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• 2011

A factorial ($4{\times}2{\times}2$) experimental design was employed to determine apparent digestibilities of dry matter (DM), protein, lipid, energy and nitrogen-free extract (NFE) of the test diets containing either ${\alpha}$-potato starch (A-PS), ${\beta}$-potato starch (B-PS), ${\beta}$-corn starch (B-CS) or dextrin (DEX) as dietary carbohydrate energy for juvenile (average weight 30 g) and grower (average weight 300 g) rockfish reared at 13$^{\circ}C$ and 20$^{\circ}C$. Chromic oxide was used as an inert marker. Feces were collected by fecal collectors attached to rearing tanks from triplicate groups of juvenile and grower rockfish. Digestibilities of DM, energy and NFE of the test diets were significantly affected by dietary carbohydrate and water temperature (p<0.01), but not by fish size. DM digestibility of the fish fed the A-PS diet was significantly higher than that of fish fed other treatments, except for the DEX diet at 20$^{\circ}C$. DM digestibility of rockfish fed the B-CS diet was significantly lower than that of other diets. A similar pattern was observed in apparent digestibility of energy. NFE digestibility of fish fed the test diets was significantly affected by carbohydrate and significantly correlated to DM (r = 0.97, p<0.01) and energy (r = 0.99, p<0.01) digestibilities, regardless of water temperature and fish size. NFE digestibility of the fish fed the ${\beta}$-starch diets was relatively lower compared to that of the ${\alpha}$-starch diets, and ranged from 35 to 43% and 20 to 27% for B-PS and B-CS, respectively. The present findings indicate that carbohydrate and water temperature significantly affected digestibilities of dry matter, energy and nitrogen-free extract of rockfish. Among dietary carbohydrates, ${\alpha}$-potato starch could be effectively used as dietary carbohydrate energy for rockfish at 13$^{\circ}C$ and 20$^{\circ}C$.

• Parasites, Hosts and Diseases
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• 제56권5호
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• pp.501-507
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• 2018

We described here the morphological characteristics for the species identification and fish hosts of Isoparorchis sp. (Digenea: Isoparorchiidae) in the Republic of Korea (Korea). Total 1,371 freshwater fishes collected in Yangcheon (Stream) in Sancheong-gun, Gyeongsangnam-do were examined by the artificial digestion methods to survey the infection status of digenetic trematode metacercariae for 4 years (2013-2016). Adult and larval worms of Isoparorchis sp. were detected in 38 (8.4%) out of 451 fish in 4 species, i.e., Pungtungia herzi, Acheilognathus koreensis, Squalidus japonicus coreanus and Odontobutis platycephala, examined. The infection density was 1.1 worm per fish infected. They were mainly found in the subcutaneous tissues and abdominal cavities. Nodules with worms in the subcutaneous tissues were revealed as the blue ink-colored bulges. Adults leaf-like, $21.6{\times}9.84mm$ in average size. The ratio of body length to body width was 2.20: 1. Oral sucker subterminal, $1.03{\times}1.22mm$. Pharynx muscular, $0.55{\times}0.54mm$. Esophagus very short. Ceca convoluted, terminated near the posterior end. Ventral sucker anterior 1/3.75, $1.99{\times}2.10mm$. The ratio of ventral sucker to oral sucker was 1.74: 1. Testes round to elliptical, both sides of ventral sucker, $1.43{\times}1.33mm$. Vitellaria highly dendritic, posterior 1/3 level. Eggs operculated, embryonated, $52{\times}32{\mu}m$ in size. By the present study, 4 fish species aforementioned are to be listed as the fish hosts of Isoparorchis sp. in Korea and additionally the morphological characteristics are to be described for the species identification.

• 한국양식학회지
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• 제19권1호
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• pp.14-18
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• 2006

해산어류인 감성돔의 담수사육에 따른 어육을 평가하기 위하여 근육의 경도와 강도를 조사하였으며, 설문조사를 통한 어육의 외관, 질감, 맛 및 냄새를 분석하였다. 또한 수익성분석을 위해 치어 및 육성어를 10개월간 양식하여 각각의 순수익(률)을 산출하였다. 담수사육 감성돔 근육의 경도 및 강도는 각각 $9210{\pm}1215g/cm^2,\;30693{\pm}6355g/cm^2$로 해수사육의 $9987{\pm}1893g/cm^2,\;31931{\pm}6549g/cm^2$보다 다소 낮았으나 유의한 차이는 없었다. 또한 설문조사한 결과, 어육의 외관, 질감, 맛 및 냄새에서도 담수 및 해수사육한 감성돔사이에 차이가 없는 것으로 나타났다. 감성돔 치어 및 육성어를 담수에서 10개월간 양식하였을 때 순수익(률)은 각각 24,000,000원(30.0%), 53,870,000원(36.9%)으로 나타났다.

• Journal of Nutrition and Health
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• 제34권4호
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• pp.367-374
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• 2001

Conjugated linoleic acid(CLA) is a naturally occuring group of derivatives of linoleic acid found in beef and dairy products. CLA has reported to reduce body fat. This study was designed to observe the effect of CLA supplementation on fat accumulation and degradation in male Sprague Dawley rats. Seventy two rats, weighing 150-180g, were divided into 2 groups according to the types of dietary fat(beef tallow or fish oil) and then each group was divided into 2 groups depending on CLA supplementation, i.e., BT, BT-CLA, FO, FO-CLA. All rats were fed experimental diet containing total fat at 12%(w/w) including CLA at 1% for 30 weeks. At 30 weeks, rats were sacrificed to measure TG, free fatty acid level in plasma, TG, lipogenic enzymes in lever and fat cell size, LPL and HSL activities in epididymal fat fad. Fish oil supplemented with CLA diet showed significant reduction in the food efficiency and weight in 30 weeks-fed rats. CLA supplement did not effect on plasma TG, hepatic TG levels and lipogenic enzymes activities in rats, but, fish oil significantly reduced, The LPL and HSL activities did not affected by CLA supplement and n-3 fatty acid rich fish oil. In conclusion, the results suggest that CLA supplement was not a proper way to reduce the fat accumulation in Sprague Dawley rats. Fish oil supplemented with CLA might better way to reduce the body fatness than fish oil itself. Therefore, It is recommended that further study be performed related to physiological and biochemical effects of CLA supplementation and n-3 fatty acid in rats for the reduction of body fatness.(Korean J Nutrition 34(4) : 367∼374, 2001)

• 한국컴퓨터정보학회논문지
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• 제13권4호
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• pp.97-103
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• 2008

이 논문은 응급상황을 인식하기 위하여 어안렌즈를 통해 획득된 영상을 이용하여 기절 동작을 인식하는 방법을 제안한다. 거실의 천장 중앙에 위치한 어안렌즈(fish-eye lens)를 장착한 카메라로부터 영상을 입력 받은 뒤, 가우시안 혼합 모델 기반의 적응적 배경 모델링 방법을 이용하여 전경 픽셀을 추출한다. 그리고 연결되어 있는 전경픽셀 영역들의 외곽점들을 추적하여 타원으로 매핑한다. 이 타원을 추적하면서 어안 렌즈 영상을 투시 영상으로 변환한 다음 타원의 크기 변화, 위치 변화, 이동 속도정보를 추출하여 이동과 정지 및 움직임이 기절동작과 유사한지를 판단한다. 실험 결과 어안 렌즈 영상을 그대로 사용하는 것보다 투시 영상으로 변환하여 타원의 크기변화, 위치변화, 이동속도 정보를 추출하는 방법이 보다 높은 인식률을 보였다.

• 한국어병학회지
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• 제12권2호
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• pp.107-113
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• 1999

능성어의 바이러스성 신경괴사증 바이러스(fish nodavirus)의 병원성을 능성어 및 다른 해산어류를 대상으로 인위감염법에 의해 조사한 결과, 능성어 바이러스성 신경괴사증 바이러스는 능성어에서는 소형어(27 g)부터 대형어(104 g)까지 제사를 일으켜 강한 병원성을 나타냈지만, 실험에 사용한 크기의 방어(537 g), 참돔(207 g), 돌돔(43 g), 넙치(41 g), 자주복(27 g) 및 조피볼락(94 g)에는 폐사를 일으키지 않아 병원성을 나타내지 않았다. 그리고 사육수온별 능성어에 대한 바이러스의 병원성은 수온 $15^{\circ}C$에서는 병원성을 나타내지 않았고, 수온 $20\sim28^{\circ}C$에서는 수온이 높을 수록 병원성을 강하게 나타냈다. 그리고 바이러스는 근육주사, 복강 주사 및 경구감염뿐만 아니라 침지감염과 혼합사육감염에 의해서도 쉽게 능성어에 감염이 되지만, 감염 후 생존한 능성어에 대해서는 바이러스를 재감염시켜도 폐사가 일어나지 않았다.

• 한국수산과학회지
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• 제38권4호
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• pp.265-275
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• 2005

A prerequisite for deriving the abundance estimates from acoustic surveys for commercially important fish species is the identification of target strength measurements for selected fish species. In relation to these needs, the goal of this study was to construct a data bank for converting the acoustic measurements of target strength to biological estimates of fish length and to simultaneously obtain the target strength-fish length relationship. Laboratory measurements of target strength on 15 commercially important fish species were carried out at five frequencies of 50, 70, 75, 120 and 200 kHz by single and split beam methods under the controlled conditions of the fresh and the sea water tanks with the 389 samples of dead and live fishes. The target strength pattern on individual fish of each species was measured as a function of tilt angle, ranging from $-45^{\circ}$ (head down aspect) to $+45^{\circ}$ (head up aspect) in $0.2^{\circ}$ intervals, and the averaged target strength was estimated by assuming the tilt angle distribution as N $(-5.0^{\circ},\;15.0^{\circ})$. The TS to fish length relationship for each species was independently derived by a least-squares fitting procedure. Also, a linear regression analysis for all species was performed to reduce the data to a set of empirical equations showing the variation of target strength to a fish length, wavelength and fish species. For four of the frequencies (50, 75, 120 and 200 kHz), an empirical model for fish target strength (TS, dB) averaged over the dorsal sapect of 602 fishes of 10 species and which spans the fish length (L, m) to wavelength (\Lambda,\;m)$ ratio between 5 and 73 was derived: $TS=19.44\;Log(L)+0.56\;Log(\Lambda)-30.9,\;(r^2=0.53)$.

• 한국수산과학회지
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• 제52권6호
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• pp.631-636
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• 2019

Fish bone-based calcium products are currently receiving much attention among high value-added industries involving calcium. Industrial processing of fish products yields unused fish parts including bones, which could be used as marine health foods to enhance the economic and environmental benefits of fish production. The ultimate goal of this study is to develop the high value-added fisheries products fortified with fish bones supplementing calcium. We here explored the physical and chemical softening methods of the fish bones to enhance texture of the fish products with a high degree of calcium absorption rates. The eluted calcium from the fish bone was quantified with the inductively coupled plasma optical emission spectrometry (ICP-OES). The characteristics of the softened fish bones were determined by the laser diffraction particle size analysis, texture profile analysis, and volatile organic compounds (VOCs) analysis. As the result, the optimized softening method of fish bone was established when Theragra chalcogramma bone was treated twice with the pressurized high temperature (110-120℃ and 1.0-1.5 kg/cm²). The produced softened fish bone turned out to be suitable for the food additives with low particle sizes, low hardness values, and negligible VOCs responsible for the unpleasant flavors.