• Title/Summary/Keyword: cultured fish

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Muscle Quality of Cultured and Wild Red sea bream (Pagrosomus auratus) (양식 및 자연산 도미(Pagrosomus auratus) 어육의 품질 특성에 관한 연구)

  • Lee, Kyung Hee;Lee, Young Soon
    • Korean journal of food and cookery science
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    • v.15 no.6
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    • pp.639-644
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    • 1999
  • The objective of this study was to compare the quality characteristics of cultured and red sea bream. The color of dorsal muscle was different between wild and cultured red sea bream. Lipid content of the dorsal muscle was higher in cultured fish than in wild one. The contents of moisture and crude protein in cultured fish muscle were almost same as those of wild one. Sensory evaluation of raw fish meat showed that cultured fish had lower preference in appearance, taste and texture than wild one. Especially the texture of cultured raw fish meat had lower preference than wild meat. For cooked fish meat, cultured fish were harder and less juicy than wild fish. These textural differences between wild and cultured meats were confirmed by objective evaluation including the measurements of hardness, springiness, and cohesiveness. Light microscopic observation showed that cultured red sea bream had more lipid in the surface layer near epidermis than wild one. Also more lipid droplet between muscle fibers were observed in cultured red sea bream by SEM.

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Seasonal Variation in the Nutritional Composition of the Muscle of Wild and Cultured Korean Bullhead Pseudobagrus fulvidraco (자연산과 양식산 동자개(Pseudobagrus fulvidraco)의 시기에 따른 영양성분 변화)

  • Lim, Chi Woon;Kim, Min A;Gye, Hyun Jin;Yoon, Na Young;Song, Mi Young;Shim, Kil Bo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.49 no.6
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    • pp.779-784
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    • 2016
  • We evaluated seasonal variations in the proximate, fatty acid and total amino acid compositions and mineral content of the muscles of wild and cultured Korean bullhead Pseudobagrus fulvidraco. The wild and cultured samples showed a significantly higher proportion of crude lipids than other components. Crude lipid content was highest in May in wild fish but lowest in May in cultured fish. We found no significant difference between wild and cultured samples in terms of fatty acid and total amino acid compositions and mineral content. The levels of saturated fatty acids (SFA) and polyunsaturated fatty acids (PUFA) as well as n-6/n-3, were higher in the muscles of wild fish compared with those of cultured fish. However, monounsaturated fatty acids (MUFA) levels were higher in cultured fish. Both wild and cultured fish were good sources of eicosapentaenoic acid (EPA) and docosa hexaenoic acid (DHA). In wild fish, the Mg and Zn contents were highest in August, while the Ca, P, Na, K, Fe, and Cu contents were highest in May. However, the mineral content of the cultured fish did not exhibit significant seasonal variation.

Comparison of The Taste Compounds of Wild and Cultured Eel, Puffer and Snake head (천연산 및 양식산 뱀장어, 복어, 가물치의 맛 성분에 대한 연구)

  • Kim, Hee-Yun;Shin, Jae-Wook;Sim, Gyu-Chang;Park, Hee-Ok;Kim, Hyun-Sook;Kim, Sang-Moo;Cho, Jae-Sun;Jang, Young-Mi
    • Korean Journal of Food Science and Technology
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    • v.32 no.5
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    • pp.1058-1067
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    • 2000
  • In this study, eel, puffer and snake head fish, which are widely taken and highly valued for processing into baked fish, soup or fish juice were studied by classifying them into wild fish and cultured fish, and evaluated in terms of taste. The samples were gathered in the area including Kimhae, Samchonpo and Haman in Kyungsangnam-do, Kangsu-Gu in Pusan and Bukcheju-Gun in Cheju-do. Proximate compositions, the content of nucleotides and their related compounds, total and free amino acids, organic acids and fatty acids of the fishes were analysed. Generally, as for the compositions, wild fish had a higher crude fat content and a lower moisture content as compared with cultured fish, while there was no great difference between them in terms of crude protein and ash contents. Nucleotides and their related compounds including ATP, ADP, AMP, IMP, HxR, Hx were detected, and the amounts of which were nearly the same with respect to the growth conditions. IMP content was high in all of the samples, while ATP content was extremely low. Total 17 amino acids were detected from the samples, and most of the samples had high contents of glutamic acid, aspartic acid, lysine, leucine, glycine, alanine and arginine, and low contents of cystein, isoleucine and methionine. As for the other amino acids, generally same level of contents were detected for each samples. In cases of eel and snake head fish, the wild fish had higher total amino acid contents in comparison with cultured fish. And the result to the contrary was obtained for the case of puffer. Sample fishes had nearly the same compose distribution of free amino acid though the contents of which were a little different according to the samples. Each sample had high contents of taurine, hydroxyproline, glutamic acid, glycine, cystathionine, ${\beta}-aminoisobutyric$ acid and lysine. Total organic acid contents of cultured fish was higher than that of wild fish. All fishes commonly had high contents of lactic acid, iso-valeric acid, oxalic acid and fumaric acid. High levels of $C_{16:0},\;C_{16:1},\;C_{18:1(cis)},\;C_{18:3},\;and\;C_{22:6}$ were shown in all of the samples and ${\omega}-3$ polyunsaturated fatty acid content of cultured fish was higher than that of wild fish, and as for the essential fatty acid, wild fish has higher content in comparison with cultured fish.

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Comparative Analysis of Proximate Compositions and Lipid Component in Cultured and Wild Mackerel Scomber japonicus Muscles (양식산 및 천연산 고등어근육의 일반성분과 지질성분 비교)

  • Moon, Soo-Kyung;Hong, Seok-Nam;Kim, In-Soo;Jeong, Bo-Young
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.5
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    • pp.411-416
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    • 2009
  • Proximate compositions and fatty acid profiles of cultured and wild mackerel (Scomber japonicus) muscles were compared. Protein content ranged from approximately 16% to 18% and was higher in wild fish than in cultured ones. Lipid content was between two to four times higher in large and small cultured fish (20.1-20.5%) compared with same sized wild fish. The prominent non-polar lipid (NL) class in fish muscles was triglyceride, and additionally, free sterol was among the prominent NL classes in wild fish muscles. Prominent phospholipid (PL) classes in cultured and wild fish muscles were phosphatidylethanolamine and phosphatidylcholine, with the former being higher in cultured fish and the latter higher in wild fish. Prominent fatty acids of total lipid were 16:0, 18:1n-9, 22:6n-3 (docosahexaenoic acid, DHA), 20:5n-3 (eicosapentaenoic acid, EPA), 16:1n-7, 18:0 and 14:0, while 18:2n-6 was among the prominent fatty acids in cultured fish. The n-3 polyunsaturated fatty acids (PUFA, DHA+EPA) content (in mg/100 g of muscle tissue) was higher in cultured fish (2,711 mg in large fish and 2,572 mg in small fish) than in wild fish (2,431 mg in large fish and 1,398 mg in small fish). In conclusion, we have been able to demonstrate that cultured mackerel could also be a good sources of n-3 PUFA, such as DHA and EPA.

Residues of Antibiotics in Wild and Cultured Fishes Collected from Coast of Korea (시중 유통 자연산 및 양식산 활어의 항생제 잔류)

  • Shim, Kil-Bo;Mok, Jong-Soo;Jo, Mi-Ra;Kim, Poong-Ho;Lee, Tae-Seek;Kim, Ji-Hoe;Cho, Young-Je
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.43 no.1
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    • pp.12-17
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    • 2010
  • Wild and cultured fish including olive flounder, sea bass, rock bream, yellowtail, gray mullet, gizzard shad, black rockfish, red seabream and squid were collected from a fish market located on the coast of Korea, and the antibiotic content of their muscle was investigated. Tetracycline group antibiotics were not detected in the 108 individuals of 9 species of wild fish. However, oxytetracycline (OTC) and tetracycline(TC) were detected in some samples of the 111 individuals in 7 cultured live fish species. The detected ranges of OTC and TC were ND~ 0.06 and ND~ 0.03, respectively. Five different fluoroquinolone antibiotics were also tested for, but were not detected in the wild fish species. Only small amount of criprofloxacin(ND~0.029 mg/kg) were detected in a few cultured fish samples. Oxolinic acid was not detected in either wild and cultured fish samples. Results showed that even very low levels of antibiotics could be detected by the testing methods used. Antibiotics were identified in a few fish samples but levels were far below the maximum allowable limits of the Korean Food Code, and the safety of fish being sold in markets, with regard to antibiotic levels, was confirmed.

Monitoring of Pathogens Detected in Cultured Fishes of Gyeongnam in 2018 (2018년 경남 양식어류에서 검출된 병원체 모니터링)

  • Kang, Ga Hyun;Cha, Seung Joo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.52 no.5
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    • pp.539-546
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    • 2019
  • The major cultured marine fishes in sea off the coast Gyeongsangnam-do Province, South Korea, were assessed and included 9.3% rockfish Sebastes schlegelii, 7.8% red seabream Pagrus major, and 2.1% rock bream Oplegnathus fasciatus. The number of insurance payments related to disease mortality in cultured fish in 2017 was fourfold that in 2016. Economic loss in aquaculture due to disease in cultured fish is high and represents an important inhibitory factor affecting marine fishery productivity. In 2018, diseases led to severe production losses in several aquaculture species: 40.0% in rockfish, 11.4% in olive flounder Paralichthys olivaceus, 10.0% in filefish Thamnaconus modestus, and 9.3% in red seabream. Fish-parasitic pathogens such as Microcotyle sebastis, Alella spp., and Dactylogyrus spp. enter mainly via the gills and skin surface. Among bacterial pathogens, Vibrio species were most common, with Vibrio harveyi being the dominant species causing infections in these fishes. The bacterium Lactococcus garvieae is thought to exhibit host specificity in fish. The fish species in the present study exhibited a higher tendency for infection by heterologous pathogens than by a single pathogen; therefore, it is necessary to devise new strategies for treating diseases in cultured fish.

Antibacterial efficacy and safety of copper sulfate pentahydrate to cultured fish (양식 어류에 있어서 황산동(copper sulfate pentahydrate)의 안전성과 살균효과에 대한 연구)

  • Heo, Gang-joon
    • Korean Journal of Veterinary Research
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    • v.37 no.1
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    • pp.203-212
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    • 1997
  • Antibacterial efficacy and safety of copper sulfate pentahydrate (5% solution) was evaluated in laboratory and field studies for disinfection of some fish bacterial pathogens in cultured fish, flounder(Paralichthys olivaceus), mirror carp(Cyprinus carpio), gold fish(Carrassius auratus) and eel(Anguilla japonica). Dipping of fishes for acute toxicity was performed for a period of 48h, and the TLm value(median tolerance limit) were 4.0ppm in mirror carp and flounder, 4.4ppm in rainbow trout, and 10.0ppm in gold fish. After exposure below than TLm value for 1 month, no side effects and histopathological changes were observed. The test drug were shown high antibacterial activities against most bacterial pathogens by exposure in the laboratory and field trials. However, Aeromonas salmonicida showed a resistance to the dosage. We can prevent outbreaks of bacterial diseases of fish by the dosage of 1ppm for 6hr and the test drug is thought to be used effectively and widely as a disinfectant against most bacterial fish pathogens.

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Comparison of behavior characteristics between wild and cultured black seabream Acanthopagrus schlegeli using acoustic telemetry (음향 텔레메트리 기법을 이용한 자연산과 양식산 감성돔의 행동특성 비교)

  • Kang, Kyoung-Mi;Shin, Hyeon-Ok;Kang, Don-Hyug;Kim, Min-Seon
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.44 no.2
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    • pp.141-147
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    • 2008
  • Acoustic telemetry technique is one of useful tools to get behavioral information of the free-swimming fish. In this study, we conducted acoustic telemetry using coded acoustic transmitters to compare behavior characteristics between wild and cultured black seabream Acanthopagrus schlegeli, one of target species to promote resource in the marine ranching area. Two wild fish and five cultured fish were released in the marine ranching area after tagging surgically. Three of cultured fish were domesticated using the remote acoustic conditioning system for 3 weeks before being released. Two wild fish stayed at the released point for 2 hours and 9 days, respectively. One of wild fish was found about 10.8km away from the released point after 5 months. Two cultured fish stayed at the released point for 6 days and 75 days, respectively. One of acoustic conditioned fish stayed at the released point for 131 days and then was found about 10.1km away from the released point after 25 days. Others stayed at the released point during this study period(159 days).

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from Streptococcus iniae shows potential as a subunit vaccine against various streptococcal species

  • Kim, Min Sun;Choi, Seung Hyuk;Kim, Ki Hong
    • Journal of fish pathology
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    • v.28 no.1
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    • pp.9-15
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    • 2015
  • The potential of Streptococcus iniae glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as an antigen for a subunit vaccine was investigated using a zebrafish model. The recombinant S. iniae GAPDH was purified using His-tag column chromatography, and antisera against the recombinant GAPDH (rGAPDH) were produced by intraperitoneal immunization of rats. By immunization with S. iniae rGAPDH, the survival rates of zebrafish against an S. iniae challenge increased, suggesting that GAPDH would be an antigen capable of inducing protective immune responses in fish. Furthermore, we demonstrated using Western blotting, that the antisera against rGAPDH of S. iniae had cross-reactivity with GAPDH from Streptococcus parauberis and Lactococcus garviae, which are also culprits of streptococcosis in cultured fish in Korea. These results suggest that S. iniae GAPDH may be used as an antigen for the development of a subunit vaccine against streptococcosis caused by diverse cocci in cultured fish.

Efficacy of Ciprofloxacin for the Control of Streptococcal Infection in Cultured Fish, Flounder(Paralichtyhs olivaceus) and Eel(Anguilla japonica) (넙치(Paralichthys olivaceus) 및 뱀장어(Anguilla japonica)의 연쇄구균즈에 대한 시프로플로삭신의 치료 효과)

  • Park, Se Chang;Heo, Gang-Joon
    • Korean Journal of Veterinary Research
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    • v.44 no.4
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    • pp.643-648
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    • 2004
  • Efficacy of ciprofloxacin was evaluated in laboratory and field studies for control of streptococcal infection in flounder and eel. In disc diffussion test, all streptococcal strains showed high sensitivity to the ciprofloxacin. Minimum inhibitory concentrations of ciprofloxacin against all streptococcal strains used in this study were less than $0.195{\mu}g/ml/$. In laboratory studies where fishes were challanged with Streptococcus iniae, significant reductions in mortality were observed among fish receiving ciprofloxacin (in fed) at 100 mg/kg/body weight or more daily for 3 d when compared with mortality of non-medicated controls. Similar results were achieved when 100 mg/kg/body weight of ciprofloxacin was used in field trials.