R.M. Gous
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View article: Research Note: Do broiler breeder hens use hypothermia to cope with cold environments and feed restriction?
Research Note: Do broiler breeder hens use hypothermia to cope with cold environments and feed restriction? Open
The deep body temperature (Tb) of broiler breeder hens was measured in a pilot trial conducted as part of an experiment in which the response of the birds to dietary protein was evaluated at different cyclical air temperatures (Ta). Temper…
View article: Broiler response to variable rates of inclusion of calcium and non-phytate phosphorus in feed
Broiler response to variable rates of inclusion of calcium and non-phytate phosphorus in feed Open
A trial was conducted to investigate the response of broilers to changing levels of calcium and non-phytate phosphorus. A total of 1344 chicks were allocated to 96 cages in a controlled-environment house. Limestone and phosphoric acid were…
View article: Effective and Responsible Management and Nutritional Strategies and Interventions for Aquaculture Performance Enhancement: Assurance of Food Security and Production Sustainability
Effective and Responsible Management and Nutritional Strategies and Interventions for Aquaculture Performance Enhancement: Assurance of Food Security and Production Sustainability Open
View article: Evaluation of body calcium and phosphorus composition of the Cobb 700 genotype during growth
Evaluation of body calcium and phosphorus composition of the Cobb 700 genotype during growth Open
1. The amount of calcium and phosphorus in the empty, feather-free bodies of Cobb 700 breed males and females was measured from hatch to 15 weeks of age.2. A four-phase ad libitum feeding programme was used to feed 400 chicks of eac…
View article: A review of the calculation of energy, protein and amino acid requirements for maintenance and egg production of breeding ostriches
A review of the calculation of energy, protein and amino acid requirements for maintenance and egg production of breeding ostriches Open
Few studies have modelled the nutrient requirements of breeding ostriches. Results obtained from historical studies were used here to determine the energy, protein and amino acid requirements of breeding ostriches for maintenance and egg p…
View article: Update and evaluation of the egg production model in laying hens
Update and evaluation of the egg production model in laying hens Open
The egg production model (EPM) described here is a mechanistic and stochastic model that simulates the amino acid and energy requirements of laying hens. It takes into account their potential rate of laying, and egg weight over time, and t…
View article: Evaluation of a mechanistic model that estimates feed intake, growth and body composition, nutrient requirements, and optimum economic response of broilers
Evaluation of a mechanistic model that estimates feed intake, growth and body composition, nutrient requirements, and optimum economic response of broilers Open
Efficient meat production is crucial in addressing global market demands and sustainability goals. Modeling production systems has gained worldwide attention, offering valuable insights for predicting outcomes and optimizing economic retur…
View article: The Response to Dietary Leucine in Laying Lens
The Response to Dietary Leucine in Laying Lens Open
This study aimed to estimate the standardized ileal digestible leucine intake (SID-Leui, mg) in laying hens for maintenance, and to describe the response in laying hens to SID-Leui, thereby providing the information required to determine t…
View article: Review: When worlds collide – poultry modeling in the ‘Big Data’ era
Review: When worlds collide – poultry modeling in the ‘Big Data’ era Open
Within poultry production systems, models have provided vital decision support, opportunity analysis, and performance optimization capabilities to nutritionists and producers for decades. In recent years, due to the advancement of digital …
View article: Composition of feathers and pulp of two broiler genotypes
Composition of feathers and pulp of two broiler genotypes Open
1. Cobb and Ross broilers (200 of each sex and breed) were fed four phases of diets ad libitum formulated with balanced protein to match their amino acid requirements throughout growth. Ten birds per genotype were sampled and euthan…
View article: Response of broilers to dietary balanced protein. 2. Determining the optimum economic level of protein
Response of broilers to dietary balanced protein. 2. Determining the optimum economic level of protein Open
Context Tables of nutrient requirements assist nutritionists to formulate acceptable feeds for broilers but do not consider the objective of a business, namely, to maximise economic returns. Aims The objective of the present study was to d…
View article: Response of broilers to dietary balanced protein. 1. Feed intake and growth
Response of broilers to dietary balanced protein. 1. Feed intake and growth Open
Context Knowing the broilers’ response to the intake of balanced protein allows nutritionists to choose the optimal level to be used in the feed. Aims The objective of the present study was to describe the response of male and female broil…
View article: Gut capacity of broiler breeder hens
Gut capacity of broiler breeder hens Open
Made available in DSpace on 2021-06-25T11:57:57Z (GMT). No. of bitstreams: 0\n Previous issue date: 2021-05-07
View article: The response of reproducing Japanese quail to dietary valine
The response of reproducing Japanese quail to dietary valine Open
1. A feeding trial was conducted to measure the responses of Japanese quail to dietary valine. In total, 280 Japanese quail were randomly assigned to eight treatments giving seven replicates (cage - 35 cm length, 35 cm width × 15 cm high).…
View article: Response of Nile tilapia (Oreochromis niloticus) to lysine: Performance, body composition, maintenance and efficiency of utilization
Response of Nile tilapia (Oreochromis niloticus) to lysine: Performance, body composition, maintenance and efficiency of utilization Open
View article: Combined Effect of Dietary Protein, Ractopamine, and Immunocastration on Boar Taint Compounds, and Using Testicle Parameters as an Indicator of Success
Combined Effect of Dietary Protein, Ractopamine, and Immunocastration on Boar Taint Compounds, and Using Testicle Parameters as an Indicator of Success Open
This study investigates the combined effect of immunocastration, dietary protein level (low, medium or high) and ractopamine hydrochloride supplementation (0 or 10 mg/kg) on the adipose concentrations of androstenone, skatole and indole in…
View article: Differences in growth and carcass composition of growing male and female turkeys
Differences in growth and carcass composition of growing male and female turkeys Open
An experiment was conducted with 1 680 one-day-old turkey poults (720 males and 960 females) of the Hybrid ConverterTM genotype to compare the growth performance of male and female turkeys. The experiment lasted until 119 days of age for m…
View article: Prediction of maximum scaled feed intake in broiler chickens based on physical properties of bulky feeds
Prediction of maximum scaled feed intake in broiler chickens based on physical properties of bulky feeds Open
1. A trial was conducted to investigate the capacity of broiler chickens to consume bulky feeds during three stages of growth. These phases were from 1 to 15 d, 16 to 30 d and from 31 to 45 d. 2. A basal feed was serially diluted (0%, 2.5%…
View article: The effect of age of introducing whole sorghum grain on performance of broiler chickens
The effect of age of introducing whole sorghum grain on performance of broiler chickens Open
1. AOAC International, 2010. Official Methods of Analysis of AOAC. 18th Edition. 3rd Revision. Gaithersburg, MD (USA). Google Scholar
View article: Response of juvenile pacu ( <i>Piaractus mesopotamicus</i> Holmberg, 1887) to balanced digestible protein
Response of juvenile pacu ( <i>Piaractus mesopotamicus</i> Holmberg, 1887) to balanced digestible protein Open
Made available in DSpace on 2020-12-12T02:09:51Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020-09-01
View article: Modeling optimum levels of balanced digestible protein for adult pacu (Piaractus mesopotamicus) and the development of an economic optimization procedure for different marketing strategies of the final yield
Modeling optimum levels of balanced digestible protein for adult pacu (Piaractus mesopotamicus) and the development of an economic optimization procedure for different marketing strategies of the final yield Open
View article: A description of the growth and moulting of feathers in commercial broilers
A description of the growth and moulting of feathers in commercial broilers Open
1. Changes in feather length and weight and daily losses of down, contour feathers, remiges and retrices were studied in two commercial broiler strains to determine feather growth and moult in broilers up to 112 d of age. 2. Ten pens of 20…
View article: A description of the potential growth and body composition of two commercial broiler strains
A description of the potential growth and body composition of two commercial broiler strains Open
1. The potential growth of feathers and feather-free body and their chemical components was measured in two commercial broiler strains. 2. A total of 200 chicks of each sex x strain were fed adequate amounts of dietary protein using a four…
View article: In vivo assessment of body composition and growth potential of modern broiler using dual-energy X-ray absorptiometry
In vivo assessment of body composition and growth potential of modern broiler using dual-energy X-ray absorptiometry Open
Context Genetic improvements in modern strains have led to continuous increments in broiler growth rates, which, as a consequence, have resulted in higher economic returns for broiler producers over the last decades. Aim The present study …
View article: Consequences of lighting programme in rearing phase and its effects on amino acid requirements in a broiler breeders flock in egg production
Consequences of lighting programme in rearing phase and its effects on amino acid requirements in a broiler breeders flock in egg production Open
View article: Modeling egg production as a means of optimizing dietary nutrient contents for laying hens
Modeling egg production as a means of optimizing dietary nutrient contents for laying hens Open
Made available in DSpace on 2019-10-06T17:12:54Z (GMT). No. of bitstreams: 0\n Previous issue date: 2019-04-01
View article: The effect of feed protein content on the uniformity of production in laying hens
The effect of feed protein content on the uniformity of production in laying hens Open
The objective of this research was to describe the effect of dietary protein content on the uniformity of egg production in ISA-Brown and Hy-Line laying strains. Six dietary protein levels (120–220 g protein/kg feed) were each fed to 16 in…
View article: Dual energy X-ray absorptiometry is a valid tool for assessing in vivo body composition of broilers
Dual energy X-ray absorptiometry is a valid tool for assessing in vivo body composition of broilers Open
The use of non-invasive techniques to estimate body composition in animals in vivo conforms to the desire to improve the welfare of animals during research and also has the potential to advance scientific research. The purpose of the prese…
View article: Modelling the egg components and internal cycle length of laying hens
Modelling the egg components and internal cycle length of laying hens Open
A model that can estimate the changes that occur to the composition of egg components over time is an important tool for the nutritionists, since it can provide information about the nutrients required by a laying hen to achieve her potent…
View article: Intermittent lighting improves resilience of broilers during the peak phase of sub-clinical necrotic enteritis infection
Intermittent lighting improves resilience of broilers during the peak phase of sub-clinical necrotic enteritis infection Open
Necrotic enteritis, either in its clinical or sub-clinical form is known to cause massive economic losses in the broiler chicken industry. Currently, the use of in-feed antibiotics as growth promoters is discouraged. Therefore, mechanisms …