Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>)
The current experiment is conducted to determine the effects of chicken by-product meal (CBM) as a fish meal (FM) replacer in diets, with or without the inclusion of jack mackerel (<i>Trachurus japonicus</i>) meal (JMM), on the growth and feed availability of rockfish (<i>Sebastes...
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MDPI AG
2025-02-01
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| author | June Kim Yu Jin Sim Sung Hwoan Cho |
| author_facet | June Kim Yu Jin Sim Sung Hwoan Cho |
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| description | The current experiment is conducted to determine the effects of chicken by-product meal (CBM) as a fish meal (FM) replacer in diets, with or without the inclusion of jack mackerel (<i>Trachurus japonicus</i>) meal (JMM), on the growth and feed availability of rockfish (<i>Sebastes schlegeli</i>). A two-way ANOVA experimental design [FM replacement level (FMRL, 25% and 50%) × JMM inclusion (without and with)] was adopted. The control (Con) diet contained 55% FM. In the Con diet, 25% and 50% of FM were substituted with CBM, either without or with the inclusion of 22% JMM, referred to as the CBM25, CBM50, CBM25J, and CBM50J diets, respectively. A total of 375 juvenile fish were distributed into 15 tanks with triplicates. The 25% FM replacement diets led to significantly (<i>p</i> < 0.003 and <i>p</i> < 0.004, respectively) greater weight gain and specific growth rate (SGR) of rockfish than the 50% FM replacement diets. Furthermore, the CBM-replaced diets with JMM inclusion led to significantly (<i>p</i> < 0.003 and <i>p</i> < 0.002, respectively) greater weight gain and SGR of fish compared with those without JMM inclusion. Weight gain and SGR of rockfish fed the Con and CBM25J diets were significantly (<i>p</i> < 0.001 for both) greater than those of fish fed the CBM25, CBM50, and CBM50J diets. However, neither dietary FMRL nor JMM inclusion had significant (<i>p</i> > 0.05) effects on feed consumption, blood chemistry, or the biochemical composition of rockfish. In conclusion, 25% of FM could be replaced with CBM in the 55% FM-based diet, including JMM, without adverse effects on the growth, feed availability, blood chemistry, or biochemical composition (proximate composition and amino and fatty acid profiles) of rockfish. |
| format | Article |
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| institution | DOAJ |
| issn | 2410-3888 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
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| series | Fishes |
| spelling | doaj-art-1c8d012fd2f64c828f56a3bbb874af672025-08-20T03:12:22ZengMDPI AGFishes2410-38882025-02-011027610.3390/fishes10020076Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>)June Kim0Yu Jin Sim1Sung Hwoan Cho2Department of Convergence Interdisciplinary Education of Maritime & Ocean Contents, Korea Maritime and Ocean University, Busan 49112, Republic of KoreaDepartment of Convergence Interdisciplinary Education of Maritime & Ocean Contents, Korea Maritime and Ocean University, Busan 49112, Republic of KoreaDivision of Convergence on Marine Science, Korea Maritime and Ocean University, Busan 49112, Republic of KoreaThe current experiment is conducted to determine the effects of chicken by-product meal (CBM) as a fish meal (FM) replacer in diets, with or without the inclusion of jack mackerel (<i>Trachurus japonicus</i>) meal (JMM), on the growth and feed availability of rockfish (<i>Sebastes schlegeli</i>). A two-way ANOVA experimental design [FM replacement level (FMRL, 25% and 50%) × JMM inclusion (without and with)] was adopted. The control (Con) diet contained 55% FM. In the Con diet, 25% and 50% of FM were substituted with CBM, either without or with the inclusion of 22% JMM, referred to as the CBM25, CBM50, CBM25J, and CBM50J diets, respectively. A total of 375 juvenile fish were distributed into 15 tanks with triplicates. The 25% FM replacement diets led to significantly (<i>p</i> < 0.003 and <i>p</i> < 0.004, respectively) greater weight gain and specific growth rate (SGR) of rockfish than the 50% FM replacement diets. Furthermore, the CBM-replaced diets with JMM inclusion led to significantly (<i>p</i> < 0.003 and <i>p</i> < 0.002, respectively) greater weight gain and SGR of fish compared with those without JMM inclusion. Weight gain and SGR of rockfish fed the Con and CBM25J diets were significantly (<i>p</i> < 0.001 for both) greater than those of fish fed the CBM25, CBM50, and CBM50J diets. However, neither dietary FMRL nor JMM inclusion had significant (<i>p</i> > 0.05) effects on feed consumption, blood chemistry, or the biochemical composition of rockfish. In conclusion, 25% of FM could be replaced with CBM in the 55% FM-based diet, including JMM, without adverse effects on the growth, feed availability, blood chemistry, or biochemical composition (proximate composition and amino and fatty acid profiles) of rockfish.https://www.mdpi.com/2410-3888/10/2/76<i>Sebastes schlegeli</i>fish meal replacement leveljack mackerel mealfeed attractantbiochemical composition |
| spellingShingle | June Kim Yu Jin Sim Sung Hwoan Cho Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>) Fishes <i>Sebastes schlegeli</i> fish meal replacement level jack mackerel meal feed attractant biochemical composition |
| title | Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>) |
| title_full | Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>) |
| title_fullStr | Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>) |
| title_full_unstemmed | Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>) |
| title_short | Effects of Chicken By-Product Meal as a Fish Meal Replacer in Diets With or Without Jack Mackerel Meal Inclusion: Growth and Feed Availability for Rockfish (<i>Sebastes schlegeli</i>) |
| title_sort | effects of chicken by product meal as a fish meal replacer in diets with or without jack mackerel meal inclusion growth and feed availability for rockfish i sebastes schlegeli i |
| topic | <i>Sebastes schlegeli</i> fish meal replacement level jack mackerel meal feed attractant biochemical composition |
| url | https://www.mdpi.com/2410-3888/10/2/76 |
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