The Effect Of Exercise And Housing Practices On Properties Of Bone In Laying Hens
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The Effect Of Exercise And Housing Practices On Properties Of Bone In Laying Hens
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Author : Warren Armin Meyer
language : en
Publisher:
Release Date : 1970
The Effect Of Exercise And Housing Practices On Properties Of Bone In Laying Hens written by Warren Armin Meyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Bones categories.
Opportunities For Exercise During Pullet Rearing
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Author : Teresa Casey-Trott
language : en
Publisher:
Release Date : 2016
Opportunities For Exercise During Pullet Rearing written by Teresa Casey-Trott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
This thesis is an investigation of the effect of providing opportunities for exercise on long term bone health of laying hens, with an emphasis on keel bone damage. Osteoporosis in laying hens is a welfare concern as it increases the risk of bone fractures. The keel bone is especially susceptible to fracture during the laying period. Providing opportunities for exercise during pullet rearing, a period of substantial musculoskeletal growth, offers a proactive approach to reducing osteoporosis by stimulating osteogenesis. The main objective was to determine whether rearing environments that offer different opportunities for exercise have long term effects on bone health and keel bone damage of laying hens. A secondary objective was to determine whether adult housing systems that offer different opportunities for exercise have an effect on bone health and keel bone damage of laying hens. Additionally, behavioural differences between hens with or without keel bone fractures were assessed, and an accelerometer to measure inactivity in laying hens was validated. Aviary-reared pullets had greater values for bone cross-sectional area, bone mineral density, bone mineral content, and bone breaking strength in wing and leg bones compared to bones of conventionally-reared pullets. Rearing effects on several bone composition measures were maintained through the end-of-lay, with aviary-reared hens having greater values for bone cross-sectional area and bone mineral content compared to conventionally-reared hens; however, bone mineral density was greater in conventionally-reared hens. Hens in large furnished cages had greater values for bone mineral density and content compared to adult hens housed in conventional cages. Aviary-reared hens had a lower prevalence of keel bone fractures throughout the laying period compared to conventionally-reared hens, with no effect of adult housing. Hens with keel fractures perched more and stood less than hens without keel fractures. Further investigation into whether these behavioural differences cause keel damage, or are a coping strategy resulting from keel damage is warranted. Future studies using the accelerometer validated within this thesis to quantify inactivity levels in laying hens may be useful in measuring changes in activity as a result of keel damage or other pain related conditions in laying hens.
Influence Of Housing Systems On Bone Properties Of Laying Hens
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Author : Prafulla Regmi
language : en
Publisher:
Release Date : 2015
Influence Of Housing Systems On Bone Properties Of Laying Hens written by Prafulla Regmi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Electronic dissertations categories.
Advances In Poultry Welfare
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Author :
language : en
Publisher: Woodhead Publishing
Release Date : 2017-11-30
Advances In Poultry Welfare written by and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-30 with Technology & Engineering categories.
Advances in Poultry Welfare provides a targeted overview of contemporary developments in poultry welfare. The reviews in the volume address topical issues related to poultry welfare research and assessment, with a focus on identifying practical strategies for improvement as well as information gaps that remain to be filled. Part One provides an introduction to poultry production systems and gives a broad overview of current poultry welfare issues. Part Two moves on to review several aspects of poultry management, focusing on hatchery practices, early rearing, and slaughter. Part Three deals with welfare assessment on the farm, while Part Four explores continuing challenges, such as feather pecking and skeletal problems. This is followed in Part Five by a discussion of emerging issues, with chapters covering alternative parasite control methods, backyard poultry production, mass depopulation, and genetic approaches to reducing the impact of environmental stressors on welfare. This book is an essential part of the wider ranging series Advances in Farm Animal Welfare, with coverage of cattle, sheep, pigs, and poultry. With its expert editor and international team of contributors, Advances in Poultry Welfare is a key reference tool for welfare research scientists and students, veterinarians involved in welfare assessment, and indeed anyone with a professional interest in the welfare of poultry. Provides in-depth reviews of emerging topics, research and applications in poultry welfare Integral part of a wider series, Advances in Agricultural Animal Welfare, which will provide comprehensive coverage of animal welfare of the world’s major farmed animals Covers a range of topical issues within the field, from beak-trimming and skeletal problems, to early rearing and the design and management of poultry production systems Edited by a distinguished leader in the field
Effect Of Housing Environment And Laying Hen Strain On Performance Egg Quality And Bone Properties As Well As Cloacal And Eggshell Microbiology
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Author : Milan Kumar Sharma
language : en
Publisher:
Release Date : 2020
Effect Of Housing Environment And Laying Hen Strain On Performance Egg Quality And Bone Properties As Well As Cloacal And Eggshell Microbiology written by Milan Kumar Sharma and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Laying hen welfare is gaining importance in the United States and several states have passed legislation for a welfare-friendly housing environment, which has forced the egg industry to explore alternative housing environments. For this reason, our first objective was to determine the effect of housing environment and laying hen strain on production performance and egg quality. Results showed that production performance of the hens raised in the alternative housing system was similar to the conventional system. The second objective was to compare the eggshell and cloacal microbiology. Our results indicated that the microbial load observed was higher in the alternative system compared to the conventional system. The third objective was to determine the effects of housing environment and laying hen strain on tibia and femur bone properties. The results demonstrated that the alternative system provided better tibia and femur bone characteristics, but it varied among laying hen strains.
Perspectives In Avian Skeletal Systems And Skeletal Abnormalities
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Author : Chongxiao (Sean) Chen
language : en
Publisher: Frontiers Media SA
Release Date : 2023-10-16
Perspectives In Avian Skeletal Systems And Skeletal Abnormalities written by Chongxiao (Sean) Chen and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-10-16 with Science categories.
The avian skeletal system is drawing increasing attention from researchers because it serves as a unique research model to study bone metabolism and pathologies, as well as the importance of bone health and its relationship with animal productivity and welfare. The avian skeleton is a delicate system providing structural support to the bird and minerals for eggshell formation, meanwhile, functioning as an immune organ. There is a lack of complete understanding of the physiological difference between mammalian and avian bones, the impact of genetic improvements, the interaction between immunity and bone health, the avian bone 3D structural development and turnover, the biological function of avian bone, and its relationship with animal well-being. Additionally, skeletal abnormalities can have a serious effect on poultry farming whereby conditions such as osteomyelitis, rickets and chondrodystrophy, among others, can cause changes in gait patterns, reduced walking ability and other pathophysiologies with subsequent detrimental effects on feed conversion and growth, as well as economic losses.
The Effect Of Exercise And Dietary Calcium On Bone Mineral Content Bone Breaking Strength And Calcium Balance
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Author : Ronald T. Smith
language : en
Publisher:
Release Date : 1984
The Effect Of Exercise And Dietary Calcium On Bone Mineral Content Bone Breaking Strength And Calcium Balance written by Ronald T. Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Calcium in animal nutrition categories.
Cumulated Index Medicus
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Author :
language : en
Publisher:
Release Date : 1997
Cumulated Index Medicus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Medicine categories.
Welfare Of The Laying Hen
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Author : G. C. Perry
language : en
Publisher: CABI
Release Date : 2004-01-01
Welfare Of The Laying Hen written by G. C. Perry and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-01-01 with Technology & Engineering categories.
The welfare of egg-producing poultry is a topic of great concern to the poultry industry and to researchers in applied animal behaviour. It is also subject to increased legislation. Issues such as battery cages, space requirements, access to daylight and ''free-range'' eggs have attracted public interest.
Bibliography Of Agriculture
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Author :
language : en
Publisher:
Release Date : 1975
Bibliography Of Agriculture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Agriculture categories.