Thiruvenkadan, 2010 – Layer breeding strategies: an overview
Layer breeding companies apply selection criteria to improve over 30 traits important for commercial egg production. Intensive selection for egg …
Layer breeding companies apply selection criteria to improve over 30 traits important for commercial egg production. Intensive selection for egg …
The social and political pressure to change egg production from conventional cage systems to alternative systems has been largely driven …
Conventional cage housing for laying hens evolved as a cost-effective egg production system. Complying with mandated hen housing alternatives would raise marginal production costs and require sizable capital investment. California data indicate that shifts from conventional cages to barn housing would likely cause farm-level cost increases of about 40% per dozen. The US data on …
By 2050, the global food requirement will increase significantly, driven by a population increase tomore than nine billion and by a richer diet. There is a need for agricultural and food systems that are not only more productive, but also sustainable. Currently, progress is hampered by a lack of understanding how to close the yield …
Global food and feed demands have been projected to double in the 21st century, which will further increase the pressure …
The effects of climate change are controversial. This paper reviews the effects of climate change on livestock following the theory …
The US egg industry is being pressured from many directions to change its production practices, particularly to address concerns about hen welfare in conventional cage systems. Responding to similar pressures, in 1999, the European Union banned conventional laying cages starting in 2012. This now impending European ban has led to the development of several alternative …
Smallholder livestock keepers represent almost 20% of the world population and steward most of the agricultural land in the tropics. …
The food price spike in the first half of 2008 has increased concerns about the global supply of food in …
Livestock are a global resource of significant benefits to society in the form of food, income, nutrients, employment, insurance, traction, …
Production ecology and conservation biology have long focused on providing the knowledge base for intensive food production and biodiversity conservation, …
An experiment was conducted with 672 Hy-Line W-36 Single Comb White Leghorn hens (69 wk of age) to evaluate the …
The objectives of this study were to compare the behaviors, postures, and heterophil-to-lymphocyte ratios (H:L) of laying hens housed in a cage system when offered a Ca premolt treatment and low-energy molt diets vs. a traditional feed withdrawal (FW) treatment during and after molt. A total of 144 Hy-Line W-36 hens (85 wk of age), …
Resting on perches is an important behaviour for laying hens. However, perches in laying hen husbandry systems are associated with health problems which may result from inadequate perch designs. The aim of this study was to focus on particular behavioural patterns shown by laying hens on different perches during night-time in order to test whether …
By investigating the prevalence and antimicrobial resistance characteristics of Gram-positive bacteria from organic and conventional keeping systems of laying hens, …