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CAB eBooks

Ebooks on agriculture and the applied life sciences from CAB International

CABI Book Chapter

Animal welfare.

Book cover for Animal welfare.

Description

This second edition book is a collection of topics on animal welfare from 46 authors of varying expertise of 15 countries. The book is composed of five parts: I (issues), introduces the background and philosophy of animal welfare; II (problems), covers problems of animal welfare; III (assessment), considers various approaches to the assessment of animal welfare; IV (solutions), emphasizes how prob...

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Chapter 16 (Page no: 263)

Genetic selection.

Welfare is affected by the genetic inheritance that an animal receives and the environment in which it is kept. The focus of this chapter is on the contribution of genetics to animal welfare and how this may be harnessed to improve the welfare of animals. The genetic structure of a domestic breed is determined by its early history and the existence of a hierarchical breeding structure that combine to increase homozygosity. This may decrease health and welfare, as well as productivity, through inbreeding depression and by increasing the prevalence of genetic disease. In most farm animals, these processes are alleviated by the use of crossbreeding, which should be more widely practised in companion animals. Genetic selection may adversely affect welfare through inappropriate selection criteria, as in many breeds of dog, either inadvertently because of unexpected genetic correlations, or as a result of the neglect of important fitness traits. Many factors constrain selection by animal breeders - such as time, the number of potential traits, negative genetic correlations between economic and welfare traits, the costs of measuring and selecting animals and shifting market requirements. Examples of welfare problems with a genetic basis that have potential for genetic selection are considered under two headings: behavioural problems, and skeletal and physiological disease. New opportunities for genetic improvement of animal welfare based on DNA markers, new electronic measurement techniques and improved statistical procedures are likely to make selection for welfare traits more effective in the near future.

Other chapters from this book

Chapter: 1 (Page no: 1) Animal ethics. Author(s): Palmer, C. Sandøe, P.
Chapter: 2 (Page no: 13) Understanding animal welfare. Author(s): Keeling, L. J. Rushen, J. Duncan, I. J. H.
Chapter: 3 (Page no: 27) Environmental challenge and animal agency. Author(s): Špinka, M. Wemelsfelder, F.
Chapter: 4 (Page no: 44) Hunger and thirst. Author(s): Kyriazakis, I. Tolkamp, B.
Chapter: 5 (Page no: 64) Pain. Author(s): Viñuela-Fernández, I. Weary, D. M. Flecknell, P.
Chapter: 6 (Page no: 78) Fear and other negative emotions. Author(s): Jones, B. Boissy, A.
Chapter: 7 (Page no: 98) Behavioural restriction. Author(s): Mason, G. J. Burn, C. C.
Chapter: 8 (Page no: 120) Health and disease. Author(s): Cockram, M. S. Hughes, B. O.
Chapter: 9 (Page no: 138) Behaviour. Author(s): Olsson, I. A. S. Würbel, H. Mench, J. A.
Chapter: 10 (Page no: 155) Physiology. Author(s): Blache, D. Terlouw, C. Maloney, S. K.
Chapter: 11 (Page no: 183) Preference and motivation research. Author(s): Fraser, D. Nicol, C. J.
Chapter: 12 (Page no: 200) Practical strategies to assess (and improve) welfare. Author(s): Butterworth, A. Mench, J. A. Wielebnowski, N.
Chapter: 13 (Page no: 215) Physical conditions. Author(s): Nielsen, B. L. Appleby, M. C. Waran, N. K.
Chapter: 14 (Page no: 228) Social conditions. Author(s): Galindo, F. Newberry, R. C. Mendl, M.
Chapter: 15 (Page no: 246) Human contact. Author(s): Hemsworth, P. H. Boivin, X.
Chapter: 17 (Page no: 279) Economics. Author(s): Bennett, R. Thompson, P.
Chapter: 18 (Page no: 291) Incentives and enforcement. Author(s): Knierim, U. Pajor, E. A. Jackson, W. T. Steiger, A.
Chapter: 19 (Page no: 304) International issues. Author(s): Appleby, M. C. Huertas, S. M.