6 articles for “Grower Phase”

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Research ArticleOpen accessIn the keywordsEffects of Dietary Isoleucine Supplementation on the Growth Performance, Carcass Characteristics and Ileal Morphology of Native ChickensCharles Venirius Lisnahan, Oktovianus Rafael Nahak, Lukas PardosiThe roles of isoleucine in the protein synthesis, metabolisms, and growth of chicken have been widely reported. However, its effect on native chicken has not been previously reported. In this work, we reported the effects of dietary isoleucine supplementation on growth performance, carcass characteristics, and ileal morphology in native chickens during the grower phase (6-12 weeks). Two hundred native chickens … …OnLine Journal of Biological Sciences, Vol. 25, Issue 2 · 21 Jun 2025 · 2,940 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Effect of Early Weaning on Performance, Health Parameters, and Carcass Traits of Bonsmara Bull Calves Under Feedlot ConditionsKgotso Patrick Matli, Thobela Louis Tyasi, Pieter FourieA feedlot is an intensive farming system used for finishing livestock. This study analyzed the performance, health, and carcass traits of Early-Weaned Calves (EWC) and Traditionally-Weaned Calves (TWC). A total of 285 Bonsmara bull calves were grouped into two weaning strategies, with 136 EWC (255±27.30 kg) and 149 TWC (308±24.60 kg). Backgrounding was followed by a finishing phase, with a … …American Journal of Animal and Veterinary Sciences, Vol. 21, Issue 2 · 14 Aug 2026 · 1,233 accessesView PDF Cite

Research ArticleOpen accessIn the abstractGrowth Performance and Blood Profiles of Indigenous Venda Chickens Under Intensive and Semi-Intensive Rearing SystemsBoasiako Oris Antwi, Ifeanyichukwu Princewill Ogbuewu, Christian Anayo MbajiorguA 91-day trial examined the impact of two production systems on crop content, growth performance, hematology, and blood chemistry of indigenous Venda chickens. One-day-old Venda chickens (n = 100) were randomly assigned to two treatments (T1 and T2) and replicated five times with 10 birds per replication. Venda chickens in each group were placed in five replicate pens, each having … …American Journal of Animal and Veterinary Sciences, Vol. 21, Issue 1 · 12 Apr 2026 · 1,424 accessesView PDF Cite

Research ArticleOpen accessIn the abstractEffects of Supplemental Fat to Low Metabolizable Energy Diets on Cholesterol and Triglyceride Contents of Broiler MeatMansour Rezaei, Atena MonfarediProblem statement: Modern diets high in Saturated Fatty Acids (SFA) and low in Monounsaturated (MUFA) and Polyunsaturated (PUFA) fatty acids are mostly blamed for the increased incidence of cardiovascular diseases. Since dietary fatty acids are absorbed by monogastric animals and deposited in their tissues without significant modification, considerable potential exists for the manipulation of the fatty acid profile of poultry … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 8,019 accessesView PDF Cite

Research ArticleOpen accessIn the abstractChange in Growth Performance and Liver Function Enzymes of Broiler Chickens Challenged with Infectious Bursal Disease Virus to Dietary Supplementation of Methionine and ThreonineElham Maroufyan, Azhar Kasim, Seyed Reza Hashemi et al.Problem statement: The aim of this study was to verify the effects of methionine and threonine supplementations higher than the NRC recommendation on growth performance, liver function enzymes, blood parameters and immune tissues of broiler chickens challenged with infectious bursal disease. Approach: A total of 450 day-old male broiler chicks were assigned to nine groups. Chickens were fed by three … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 1 · 31 Mar 2010 · 9,469 accessesView PDF Cite

Research ArticleOpen accessIn the abstractEffects of Reduced- Protein Diets at Constant Total Sulfur Amino Acids: Lysine Ratio on Pullet Development and Subsequent Laying Hen PerformanceFariborz Khajali, M. Faraji, Saeid Karimi DehkordiThe effect of using a low protein regime in pullet development and subsequent layer performance was studied. The experiment consisted of two periods of rearing and laying. Two hundred and sixty Hy-line W36 chicks were used. In the rearing period, dietary protein level and ME content series of the control group used during starter (18-42), grower (43-63) and developer (64-119d) … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 4 · 31 Dec 2007 · 7,067 accessesView PDF Cite