نتایج جستجو برای: broiler breeder chicken

تعداد نتایج: 56470  

2011
Heng-wei Cheng

among the major stressors in poultry that cause suffering and death of chickens. Beak trimming, removal of 1/3 to 1/2 of the beak, is a routine husbandry procedure practiced in the poultry industry, including laying hens, broiler breeders, turkey and ducks, to prevent those undesirable behaviors. However, beak trimming is a painful procedure. There is a considerable body of morphological, neuro...

Journal: Poultry Science Journal 2019
Akhlaghi A Ansari Pirsaraei Z Hashemi SR Jafari Ahangari Y, Rostami S Saemi F

Published data on 4-week-long administration of exogenous thyroxine in broiler breeder hens to decline the cold-induced ascites in their progeny suggest that the long-term maternal hyperthyroidism would affect egg quality characteristics traits in Cobb 500 broiler breeder hens. Seventy 47-w-old broiler breeder Cobb 500 hens (5 replicates and 7 hens each) were assigned in separate cages and allo...

Journal: :Poultry science 2007
M M Lordelo M C Calhoun N M Dale M K Dowd A J Davis

Gossypol, a natural component of cottonseed meal, exists in positive (+) or negative (-) enantiomeric forms, and their levels and ratio could be altered by developing new genetic strains of cotton. Two experiments were conducted to determine the relative toxicity of the individual gossypol enantiomers in laying and broiler breeder hens. In the first experiment, 25 individually caged Hy-Line W-3...

Journal: :Poultry science 2005
T A Jones C A Donnelly M Stamp Dawkins

Data from a large commercial-scale experiment in which 10 major broiler producer companies stocked whole houses of birds at 30, 34, 38, 42, and 46 kg/m2 were analyzed to identify 1) temperature and humidity profiles achieved throughout the growth cycle, 2) management practices and equipment that contributed to observed variation in environmental conditions, and 3) the extent to which environmen...

Journal: :Avian diseases 2017
David A Kennedy Christopher Cairns Matthew J Jones Andrew S Bell Rahel M Salathé Susan J Baigent Venugopal K Nair Patricia A Dunn Andrew F Read

Marek's disease virus is a herpesvirus of chickens that costs the worldwide poultry industry more than US$1 billion annually. Two generations of Marek's disease vaccines have shown reduced efficacy over the last half century due to evolution of the virus. Understanding where the virus is present may give insight into whether continued reductions in efficacy are likely. We conducted a 3-yr surve...

Journal: : 2021

The Effect of Different Sources Selenium and Microencapsulation on Fertility Hatching Traits in Arbor Acres Broiler Breeder

2011
Okti Poetri Annemarie Bouma Ivo Claassen Guus Koch Retno Soejoedono Arjan Stegeman Michiel van Boven

Vaccination of chickens has become routine practice in Asian countries in which H5N1 highly pathogenic avian influenza (HPAI) is endemically present. This mainly applies to layer and breeder flocks, but broilers are usually left unvaccinated. Here we investigate whether vaccination is able to reduce HPAI H5N1 virus transmission among broiler chickens. Four sets of experiments were carried out, ...

2011
Emer O'Mahony James F. Buckley Declan Bolton Paul Whyte Séamus Fanning

This study aimed to identify the sources and routes of transmission of Campylobacter in intensively reared poultry farms in the Republic of Ireland. Breeder flocks and their corresponding broilers housed in three growing facilities were screened for the presence of Campylobacter species from November 2006 through September 2007. All breeder flocks tested positive for Campylobacter species (with...

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