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EFFECTS OF GROUP SIZE AND REARING CONDITIONS ON BEHAVIOUR AND USE OF SPACE BY THE DOMESTIC FOWL (Gallus domesticus)

(English Summary of the Ph.D. Thesis, March 1994) 

Inma Estevez

Departamento de Biología Animal, Facultad de Ciencias, Universidad de Córdoba. 14004 Córdoba, Spain.

Supervisors:

Professor L. Arias de Reyna (Biología Animal, Universidad de Córdoba)

Dr. P. Recuerda (Biología Animal, Universidad de Córdoba)

Dr. R. Newberry (Agriculture Canada, Agassiz B.C., Canada)

Keeping chickens in large group sizes at high stocking densities is a common practice in the broiler chicken industry to improve financial returns per square meter of housing space. This management practice results in a reduction in final body weight of chickens. In laying hens, this effect is generally explained as an effect of restriction of access to resources of low ranking birds by dominants.

 

 

 

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