Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea
The objective of this study was to conduct field experiments comparing formulated (extruded pellets (E.P)) and raw-fish (moist pellets (M.P)) feeds at two flounder aquaculture farms for six months to obtain the basic data necessary for improving aquafarmers’ awareness of feed-quality issues and firm...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Fishes |
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| Online Access: | https://www.mdpi.com/2410-3888/5/3/21 |
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| author | Joo-Young Jung Soohwan Kim Kyochan Kim Bong-Joo Lee Kang-Woong Kim Hyon-Sob Han |
| author_facet | Joo-Young Jung Soohwan Kim Kyochan Kim Bong-Joo Lee Kang-Woong Kim Hyon-Sob Han |
| author_sort | Joo-Young Jung |
| collection | DOAJ |
| description | The objective of this study was to conduct field experiments comparing formulated (extruded pellets (E.P)) and raw-fish (moist pellets (M.P)) feeds at two flounder aquaculture farms for six months to obtain the basic data necessary for improving aquafarmers’ awareness of feed-quality issues and firmly establish and expand the use of formulated feed. According to the results, the M.P group was higher in weight gain, feed efficiency ratio, protein efficiency ratio, and specific growth rate and lower in mortality rate than the E.P group. All cases of mortality were caused by six kinds of disease, four of which (<i>Vibrio</i> sp., <i>Edwardsiella</i> sp., <i>Streptococcus</i> sp., and <i>Scuticociliates</i>) were common to the two groups, whereas <i>Lymphocystis</i> arose only in the M.P group and abdominal inflation only in the E.P group at both farms. As for mortality in the present experiment, the numbers were 1047 at Da-Hae farm and 1167 at Global farm, with more fish dying in the E.P tanks than in the M.P tanks. By multiplying the number of deaths by selling price, the economic losses were $9650 and $10,756, respectively. Therefore, it should be considered an urgent priority to develop flounder-exclusive formulated feed for improved digestion and absorption rate and also to establish a water-quality-improvement management plan. |
| first_indexed | 2024-03-10T18:28:50Z |
| format | Article |
| id | doaj.art-96e8eba90c8d441381d073a46027e2aa |
| institution | Directory Open Access Journal |
| issn | 2410-3888 |
| language | English |
| last_indexed | 2024-03-10T18:28:50Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fishes |
| spelling | doaj.art-96e8eba90c8d441381d073a46027e2aa2023-11-20T06:46:14ZengMDPI AGFishes2410-38882020-07-015321010.3390/fishes5030021Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in KoreaJoo-Young Jung0Soohwan Kim1Kyochan Kim2Bong-Joo Lee3Kang-Woong Kim4Hyon-Sob Han5Faculty of Marine Applied Biosciences, Kunsan National University, 558 Daehak-ro, Gunsan, Jeonbuk 54150, KoreaFaculty of Marine Applied Biosciences, Kunsan National University, 558 Daehak-ro, Gunsan, Jeonbuk 54150, KoreaFaculty of Marine Applied Biosciences, Kunsan National University, 558 Daehak-ro, Gunsan, Jeonbuk 54150, KoreaAquafeed Research Center, National Institute of Fisheries Science, 2600 Haean-ro, Chongha-myun, Buk-gu, Pohang, Gyeongsangbuk-do 37517, KoreaAquafeed Research Center, National Institute of Fisheries Science, 2600 Haean-ro, Chongha-myun, Buk-gu, Pohang, Gyeongsangbuk-do 37517, KoreaFaculty of Marine Applied Biosciences, Kunsan National University, 558 Daehak-ro, Gunsan, Jeonbuk 54150, KoreaThe objective of this study was to conduct field experiments comparing formulated (extruded pellets (E.P)) and raw-fish (moist pellets (M.P)) feeds at two flounder aquaculture farms for six months to obtain the basic data necessary for improving aquafarmers’ awareness of feed-quality issues and firmly establish and expand the use of formulated feed. According to the results, the M.P group was higher in weight gain, feed efficiency ratio, protein efficiency ratio, and specific growth rate and lower in mortality rate than the E.P group. All cases of mortality were caused by six kinds of disease, four of which (<i>Vibrio</i> sp., <i>Edwardsiella</i> sp., <i>Streptococcus</i> sp., and <i>Scuticociliates</i>) were common to the two groups, whereas <i>Lymphocystis</i> arose only in the M.P group and abdominal inflation only in the E.P group at both farms. As for mortality in the present experiment, the numbers were 1047 at Da-Hae farm and 1167 at Global farm, with more fish dying in the E.P tanks than in the M.P tanks. By multiplying the number of deaths by selling price, the economic losses were $9650 and $10,756, respectively. Therefore, it should be considered an urgent priority to develop flounder-exclusive formulated feed for improved digestion and absorption rate and also to establish a water-quality-improvement management plan.https://www.mdpi.com/2410-3888/5/3/21olive flounder in Koreamoist pelletsextruded pellets<i>Lymphocystis</i>abdominal inflation |
| spellingShingle | Joo-Young Jung Soohwan Kim Kyochan Kim Bong-Joo Lee Kang-Woong Kim Hyon-Sob Han Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea Fishes olive flounder in Korea moist pellets extruded pellets <i>Lymphocystis</i> abdominal inflation |
| title | Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea |
| title_full | Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea |
| title_fullStr | Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea |
| title_full_unstemmed | Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea |
| title_short | Feed and Disease at Olive Flounder (<i>Paralichthys olivaceus</i>) Farms in Korea |
| title_sort | feed and disease at olive flounder i paralichthys olivaceus i farms in korea |
| topic | olive flounder in Korea moist pellets extruded pellets <i>Lymphocystis</i> abdominal inflation |
| url | https://www.mdpi.com/2410-3888/5/3/21 |
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