Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis
A 56-day feeding experiment was carried out to evaluate the effects of substituting fish meal (FM) with chicken by-product meal (CBM) in diets on the growth and feed utilization of rockfish (<i>Sebastes schlegeli</i>). Six experimental diets were formulated to be isonitrogenous and isoli...
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2025-01-01
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| author | Ran Li Sung Hwoan Cho |
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| description | A 56-day feeding experiment was carried out to evaluate the effects of substituting fish meal (FM) with chicken by-product meal (CBM) in diets on the growth and feed utilization of rockfish (<i>Sebastes schlegeli</i>). Six experimental diets were formulated to be isonitrogenous and isolipidic. The control (Con) diet included 55% FM. In the Con diet, 10%, 20%, 30%, 40%, and 50% of FM was replaced with CBM, named as the CBM<sub>10</sub>, CBM<sub>20</sub>, CBM<sub>30</sub>, CBM<sub>40</sub>, and CBM<sub>50</sub> diets, respectively. A total of 540 juvenile fish were distributed into 18 tanks (30 fish per tank and 3 tanks per diet) and fed to apparent satiation two times daily for 56 days. The weight gain and specific growth rate of rockfish fed the CBM<sub>10</sub> and CBM<sub>20</sub> diets were comparable to rockfish fed the Con diet. The feed consumption of rockfish fed the Con and CBM<sub>10</sub> diets was significantly (<i>p <</i> 0.001) higher than that of fish fed all other diets, except for the CBM<sub>20</sub> diet. However, protein retention, biometric indices, chemical composition, amino acid profiles, and plasma and serum parameters of rockfish were not significantly influenced by dietary FM substitution with CBM. The Con, CBM<sub>10</sub>, and CBM<sub>20</sub> diets showed superior (<i>p <</i> 0.001) economic profit index (EPI) compared to the CBM<sub>30</sub>, CBM<sub>40</sub>, and CBM<sub>50</sub> diets. Conclusively, FM up to 20% could be substituted by CBM in diets without impairing growth, feed availability, chemical composition, amino acid profiles, and blood parameters of rockfish grown from 2.5 g to 12.5 g. However, the long-term effects of CBM substitution or the potential use of combined CBM and other alternative protein sources for FM in rockfish diets are needed in future. |
| format | Article |
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| publishDate | 2025-01-01 |
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| series | Animals |
| spelling | doaj-art-dc5354c73bf8467e85cc3aba4b4034832025-08-20T02:27:38ZengMDPI AGAnimals2076-26152025-01-011518010.3390/ani15010080Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical AnalysisRan Li0Sung Hwoan Cho1Xingzhi College, Zhejiang Normal University, Jinhua 321004, ChinaDivision of Convergence on Marine Science, Korea Maritime and Ocean University, Busan 49112, Republic of KoreaA 56-day feeding experiment was carried out to evaluate the effects of substituting fish meal (FM) with chicken by-product meal (CBM) in diets on the growth and feed utilization of rockfish (<i>Sebastes schlegeli</i>). Six experimental diets were formulated to be isonitrogenous and isolipidic. The control (Con) diet included 55% FM. In the Con diet, 10%, 20%, 30%, 40%, and 50% of FM was replaced with CBM, named as the CBM<sub>10</sub>, CBM<sub>20</sub>, CBM<sub>30</sub>, CBM<sub>40</sub>, and CBM<sub>50</sub> diets, respectively. A total of 540 juvenile fish were distributed into 18 tanks (30 fish per tank and 3 tanks per diet) and fed to apparent satiation two times daily for 56 days. The weight gain and specific growth rate of rockfish fed the CBM<sub>10</sub> and CBM<sub>20</sub> diets were comparable to rockfish fed the Con diet. The feed consumption of rockfish fed the Con and CBM<sub>10</sub> diets was significantly (<i>p <</i> 0.001) higher than that of fish fed all other diets, except for the CBM<sub>20</sub> diet. However, protein retention, biometric indices, chemical composition, amino acid profiles, and plasma and serum parameters of rockfish were not significantly influenced by dietary FM substitution with CBM. The Con, CBM<sub>10</sub>, and CBM<sub>20</sub> diets showed superior (<i>p <</i> 0.001) economic profit index (EPI) compared to the CBM<sub>30</sub>, CBM<sub>40</sub>, and CBM<sub>50</sub> diets. Conclusively, FM up to 20% could be substituted by CBM in diets without impairing growth, feed availability, chemical composition, amino acid profiles, and blood parameters of rockfish grown from 2.5 g to 12.5 g. However, the long-term effects of CBM substitution or the potential use of combined CBM and other alternative protein sources for FM in rockfish diets are needed in future.https://www.mdpi.com/2076-2615/15/1/80rockfish (<i>Sebastes schlegeli</i>)fish meal replacementchicken by-productblood chemistryeconomic profit index |
| spellingShingle | Ran Li Sung Hwoan Cho Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis Animals rockfish (<i>Sebastes schlegeli</i>) fish meal replacement chicken by-product blood chemistry economic profit index |
| title | Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis |
| title_full | Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis |
| title_fullStr | Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis |
| title_full_unstemmed | Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis |
| title_short | Fish Meal Replacement by Chicken By-Product Meal in Diet: Impacts on Growth and Feed Availability of Juvenile Rockfish (<i>Sebastes schlegeli</i>), and Economical Analysis |
| title_sort | fish meal replacement by chicken by product meal in diet impacts on growth and feed availability of juvenile rockfish i sebastes schlegeli i and economical analysis |
| topic | rockfish (<i>Sebastes schlegeli</i>) fish meal replacement chicken by-product blood chemistry economic profit index |
| url | https://www.mdpi.com/2076-2615/15/1/80 |
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