Evaluation of crowding of caged laying hens (Gallus domesticus) using fuzzy set decision analysis

W. B. Roush, Randall Gray Bock, M. A. Marszalek

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Crowding of caged laying hens was evaluated using fuzzy set decision analysis. Membership values and their complements were calculated for fuzzy sets of biological responses of laying hens for different levels of population density. Biological responses were egg production, mortality, and serum corticosterone levels of hens associated with population densities of 2, 3, 4, 5 and 6 hens per cage (1549 cm2). The data were set up as a fuzzy decision analysis problem. The optimal decision was based on the maximum of the minimum (maximin) membership values in the decision set. Based on the goals and constraints of the problem, the number of birds per cage at the break-even point (maximin) between a crowded and uncrowded condition was 3 hens per 1549-cm2 cage. Fuzzy decision analysis of behavior, physiology, and productivity responses would be useful in evaluating the welfare of animals in existing and proposed environmental systems.

Original languageEnglish (US)
Pages (from-to)155-163
Number of pages9
JournalApplied Animal Behaviour Science
Volume23
Issue number1-2
DOIs
StatePublished - Jan 1 1989

Fingerprint

Crowding
Decision Support Techniques
laying hens
hens
Chickens
cages
chickens
Population Density
population density
Animal Welfare
corticosterone
Corticosterone
animal welfare
Birds
Ovum
egg production
complement
physiology
Mortality
birds

All Science Journal Classification (ASJC) codes

  • Food Animals
  • Animal Science and Zoology

Cite this

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Evaluation of crowding of caged laying hens (Gallus domesticus) using fuzzy set decision analysis. / Roush, W. B.; Bock, Randall Gray; Marszalek, M. A.

In: Applied Animal Behaviour Science, Vol. 23, No. 1-2, 01.01.1989, p. 155-163.

Research output: Contribution to journalArticle

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