Recent Advancement in Poultry Egg Production and Potential Challenges

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Poultry".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 3857

Special Issue Editor


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Guest Editor
Department of Human Nutrition, Food and Animal Sciences, College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, Honolulu, HI 96822, USA
Interests: poultry reproduction; stress physiology; genetic and hormonal regulation of egg production
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Special Issue Information

Dear Colleagues,

Breeders have been continuously developing lines of long-life layers to achieve greater egg-lay per bird, and some improvements have been achieved for better egg quality. However, there are several challenges associated with the quality of egg production, hen health, and welfare issues. This Special Issue will highlight the current findings on egg production, in terms of aspects such as genetic, nutrition, housing, lighting, etc. The potential challenges include health and stress in the cage, antibiotic-free rearing systems, diseases and deformities, and poultry welfare issues.

Dr. Birendra Mishra
Guest Editor

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Keywords

  • Poultry reproduction
  • egg
  • production

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Published Papers (1 paper)

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Review

15 pages, 2260 KiB  
Review
Perches as Cooling Devices for Reducing Heat Stress in Caged Laying Hens: A Review
by Jiaying Hu, Yijie Xiong, Richard S. Gates and Heng-Wei Cheng
Animals 2021, 11(11), 3026; https://doi.org/10.3390/ani11113026 - 21 Oct 2021
Cited by 4 | Viewed by 2833
Abstract
Heat stress is one of the most detrimental environmental challenges affecting the biological process and the related production performance of farm animals, especially in poultry. Commercial laying hens have been bred (selected) for high egg production, resulting in increased sensitivity to heat stress [...] Read more.
Heat stress is one of the most detrimental environmental challenges affecting the biological process and the related production performance of farm animals, especially in poultry. Commercial laying hens have been bred (selected) for high egg production, resulting in increased sensitivity to heat stress due to breeding-linked metabolic heat production. In addition, laying hens are prone to heat stress due to their inadequate species-specific cooling mechanisms resulting in low heat tolerance. In addition, hens have no sweat glands and feathering covers almost their entire body to minimize body heat loss. The poultry industry and scientists are developing cooling methods to prevent or reduce heat stress-caused damage to chicken health, welfare, and economic losses. We have designed and tested a cooling system using perches, in which chilled water (10 °C) circulates through a conventional perch passing through the layer cages to offer the cooling potential to improve hen health, welfare, and performance during acute and chronic periods of heat stress (35 °C). This review summarizes the outcomes of a multi-year study using the designed cooled perch system. The results indicate that conducting heat from perching hens directly onto the cooled perch system efficiently reduces heat stress and related damage in laying hens. It provides a novel strategy: perches, one key furnishment in cage-free and enriched colony facilities, could be modified as cooling devices to improve thermal comfort for hens during hot seasons, especially in the tropical and subtropical regions. Full article
(This article belongs to the Special Issue Recent Advancement in Poultry Egg Production and Potential Challenges)
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