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Anim Biosci > Accepted Articles
DOI: https://doi.org/10.5713/ab.20.0755    [Accepted] Published online January 4, 2021.
Effects of dietary hatchery by-products on growth performance, relative organ weight, plasma measurements, immune organ index, meat quality, and tibia characteristics of broiler chickens
Won Jun Choi1  , Jong Hyuk Kim1  , Gi Ppeum Han1  , Chan Ho Kwon1  , Dong Yong Kil1,* 
Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
Correspondence:  Dong Yong Kil, Tel: 82-31-670-3028, Email: dongyong@cau.ac.kr
Received: 5 November 2020   • Revised: 21 December 2020   • Accepted: 26 December 2020
Abstract
Objective
The objective of the current study was to investigate the effects of dietary hatchery by-products (HBPs) as a replacement of fish meal (FM) on growth performance, relative organ weight, plasma measurements, immune organ index, meat quality, and tibia characteristics of broiler chickens.
Methods
A total of 720 broiler chickens (3 d of age) were randomly allotted to 1 of 9 treatments with 8 replicates. Each replicate consisted of 5 male and 5 female birds. The basal diet was formulated to contain 5.0% commercial FM, whereas eight treatment diets were prepared by replacing 25, 50, 75, or 100% of FM in the basal diet with infertile eggs (IFE) or a mixture of various HBPs (MIX); therefore, the inclusion levels of IFE or MIX in the experimental diets were 1.25, 2.50, 3.75, or 5.00%. The diets and water were provided on an ad libitum basis for 32 d.
Results
Increasing inclusion levels of IFE as a replacement of FM in diets had no effects on growth performance, plasma measurements, immune organ index, and tibia characteristics of broiler chickens. Increasing inclusion levels of IFE in diets increased (linear, p<0.05) meat lightness (L*) but decreased (linear, p<0.05) meat redness (a*). The breast meat pH at 1-h postmortem was increased (linear, p<0.05) by increasing inclusion levels of IFE in diets. Likewise, increasing inclusion levels of MIX in diets had no effects on growth performance, relative organ weight, plasma measurements, immune organ index, and tibia characteristics. However, increasing inclusion levels of MIX in diets increased (linear, p<0.05) 1-h postmortem pH but decreased (linear, p<0.05) 24-h postmortem pH of breast meat. Increasing inclusion levels of MIX in diets decreased (linear, p<0.05) TBARS values of breast meat.
Conclusion
Both IFE and MIX are suitable alternatives to FM as protein ingredients in broiler diets.
Keywords: Animal Protein Ingredient; Broiler Chicken; Fish Meal; Growth Performance; Hatchery By-products; Infertile Eggs


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