Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm
Olive flounder (<i>Paralichthys olivaceus</i>) is a commercially important and valuable species for aquaculture in Korea. Due to the unstable supply of fishmeal for farmed fish, an optimum fish-feed formulation should be researched to ensure the sustainability of <i>P. olivaceus<...
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MDPI AG
2021-07-01
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| author | Su-Jin Park Bong Seung Seo Hung Sik Park Bong-Joo Lee Sang-Woo Hur Taek-Jeong Nam Kyeong-Jun Lee Seunghyung Lee Youn Hee Choi |
| author_facet | Su-Jin Park Bong Seung Seo Hung Sik Park Bong-Joo Lee Sang-Woo Hur Taek-Jeong Nam Kyeong-Jun Lee Seunghyung Lee Youn Hee Choi |
| author_sort | Su-Jin Park |
| collection | DOAJ |
| description | Olive flounder (<i>Paralichthys olivaceus</i>) is a commercially important and valuable species for aquaculture in Korea. Due to the unstable supply of fishmeal for farmed fish, an optimum fish-feed formulation should be researched to ensure the sustainability of <i>P. olivaceus</i> aquaculture. This study investigated the effect of three experimental diets: Con (basal diet); FM<sub>20</sub> (20% fishmeal replacement of CON); and FM<sub>30</sub> (30% fishmeal replacement of CON) on <i>P. olivaceus</i> over 20 weeks at a typical farm by monitoring the growth and factors relating to sexual maturation. The results showed that no differences in growth were observed between the CON and diet-replacement groups. Gonadal oocyte development was similar between the CON and diet-replacement groups. Moreover, sbGnRH and GH expression did not differ between the CON and diet-replacement groups. The levels of Erβ and Vtg expression were significantly higher in the FM<sub>20</sub> group than in the CON and FM<sub>30</sub> groups after the experimental period. The expression of PSS-I was significantly higher in the FM<sub>30</sub> group than in the CON and FM<sub>20</sub> groups. Therefore, although growth occurred when 30% of the fishmeal was replaced, such high dietary protein replacement may be ill-advised during the maturation of olive flounder at the commercial fish farm. |
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| language | English |
| last_indexed | 2024-03-10T09:48:10Z |
| publishDate | 2021-07-01 |
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| record_format | Article |
| series | Animals |
| spelling | doaj.art-9ead28ac0f7a4244bc8762fbeac1649c2023-11-22T03:00:58ZengMDPI AGAnimals2076-26152021-07-01117205510.3390/ani11072055Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish FarmSu-Jin Park0Bong Seung Seo1Hung Sik Park2Bong-Joo Lee3Sang-Woo Hur4Taek-Jeong Nam5Kyeong-Jun Lee6Seunghyung Lee7Youn Hee Choi8Department of Fisheries Biology, Pukyong National University, Busan 48513, KoreaDepartment of Fisheries Biology, Pukyong National University, Busan 48513, KoreaAlphaAqua, Busan 47042, KoreaAquafeed Research Center, National Institute of Fisheries Science, Pohang 37517, KoreaAquafeed Research Center, National Institute of Fisheries Science, Pohang 37517, KoreaInstitute of Fisheries Sciences, Pukyong National University, Busan 46041, KoreaDepartment of Marine Life Science, Jeju National University, Jeju 63234, KoreaDepartment of Fisheries Biology, Pukyong National University, Busan 48513, KoreaDepartment of Fisheries Biology, Pukyong National University, Busan 48513, KoreaOlive flounder (<i>Paralichthys olivaceus</i>) is a commercially important and valuable species for aquaculture in Korea. Due to the unstable supply of fishmeal for farmed fish, an optimum fish-feed formulation should be researched to ensure the sustainability of <i>P. olivaceus</i> aquaculture. This study investigated the effect of three experimental diets: Con (basal diet); FM<sub>20</sub> (20% fishmeal replacement of CON); and FM<sub>30</sub> (30% fishmeal replacement of CON) on <i>P. olivaceus</i> over 20 weeks at a typical farm by monitoring the growth and factors relating to sexual maturation. The results showed that no differences in growth were observed between the CON and diet-replacement groups. Gonadal oocyte development was similar between the CON and diet-replacement groups. Moreover, sbGnRH and GH expression did not differ between the CON and diet-replacement groups. The levels of Erβ and Vtg expression were significantly higher in the FM<sub>20</sub> group than in the CON and FM<sub>30</sub> groups after the experimental period. The expression of PSS-I was significantly higher in the FM<sub>30</sub> group than in the CON and FM<sub>20</sub> groups. Therefore, although growth occurred when 30% of the fishmeal was replaced, such high dietary protein replacement may be ill-advised during the maturation of olive flounder at the commercial fish farm.https://www.mdpi.com/2076-2615/11/7/2055olive flounderfishmeal replacementtypical fish farmgrowthmaturityhormones |
| spellingShingle | Su-Jin Park Bong Seung Seo Hung Sik Park Bong-Joo Lee Sang-Woo Hur Taek-Jeong Nam Kyeong-Jun Lee Seunghyung Lee Youn Hee Choi Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm Animals olive flounder fishmeal replacement typical fish farm growth maturity hormones |
| title | Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm |
| title_full | Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm |
| title_fullStr | Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm |
| title_full_unstemmed | Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm |
| title_short | Effect of Fishmeal Content in the Diet on the Growth and Sexual Maturation of Olive Flounder (<i>Paralichthys</i> <i>olivaceus</i>) at a Typical Fish Farm |
| title_sort | effect of fishmeal content in the diet on the growth and sexual maturation of olive flounder i paralichthys i i olivaceus i at a typical fish farm |
| topic | olive flounder fishmeal replacement typical fish farm growth maturity hormones |
| url | https://www.mdpi.com/2076-2615/11/7/2055 |
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