Abstract
Fourteen days old Rhode Island Red chicks were used to evaluate effects of processed fish offal (fishmeal) on DM intake (DMI), body weight gain (BWG), feed conversion ratio (FCR = DMI/BWG) and carcass traits. Ten chicks were assigned to each of 3 replicates of 6 diets (T1, T2, T3, T4, T5, T6, containing 0, 3.32, 6.64, 9.96, 13.28 and 16.6% fishmeal, respectively, having 18.44–19.82% CP). After 77 days of ad-lib feeding, 3 male and 3 female chicks per treatment were fasted overnight, killed and body parts weighed. T1 had lowest but T6 highest (p ≤ 0.001) daily intakes of 68.5 and 77.0 g DM head−1, 13.3 and 14.8 g CP head−1 and 231 and 243 kcal ME head−1, respectively. BWG (10.7 g head−1 d−1), FCR (6.79), weights of carcass (569 g), breast (160 g) and total edible (676 g) and dressing % (66%) of T1 (0% fishmeal) was smaller (p ≤ 0.001) than those of fishmeal groups {12.8 to 13.5 g head−1 d−1; 5.83 to 6.35 g; 671 to 729 g; 196 to 219 g; 807 to 876 g and 67 to 68%, respectively}. Best results of BWG, FCR and carcass traits were obtained at 9.96% fishmeal inclusion level; however acceptable results could be obtained up to 12.5%.
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Abbreviations
- ADF:
-
acid detergent fiber
- Ca:
-
calcium
- CF:
-
crude fiber
- CP:
-
crude protein
- DM:
-
dry matter
- EE:
-
ether extract
- ME:
-
metabolisable energy
- N:
-
nitrogen
- NDF:
-
neutral detergent fiber
- OM:
-
organic matter
- P:
-
phosphorus
- PUFA:
-
poly unsaturated fatty acid
- RIR:
-
Rhode Island Red
- TEO:
-
total edible offal
- TNEO:
-
total non-edible offal
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Acknowledgements
The advice received from Dr. Yosef Tekle-Giorgis for most of the data analysis is greatly acknowledged. We thank the National Veterinary Institute for the chemical analyses of feeds.
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Negesse, T., Tera, A. Effects of feeding different levels of cooked and sun dried fish offal on carcass traits of growing Rhode Island Red chicks. Trop Anim Health Prod 42, 45–54 (2010). https://doi.org/10.1007/s11250-009-9384-x
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DOI: https://doi.org/10.1007/s11250-009-9384-x