Body Characteristics of White Leghorn Pullets Housed in Cages and Floor Pens ,
نویسندگان
چکیده
منابع مشابه
Early access to perches in caged White Leghorn pullets.
Osteoporosis, a progressive decrease in mineralized structural bone, causes 20 to 35% of all mortalities in caged White Leghorn hens. Previous research has focused on manipulating the egg laying environment to improve skeletal health, with little research on the pullet. The objective of the current study was to determine the effect of perch access on pullet health, bone mineralization, muscle d...
متن کاملEffects of perch access and age on physiological measures of stress in caged White Leghorn pullets.
The neuroendocrine system controls animals' adaptability to their environments by releasing psychotropic compounds such as catecholamines [epinephrine (EP), norepinephrine (NE), and dopamine (DA)], corticosterone (CORT), and serotonin (5-hydroxytryptamine or 5-HT). Changes of these neuroendocrine compounds have been used as biomarkers of animals' stress responses associated with their well-bein...
متن کاملComparison of bones of 4 strains of laying hens kept in conventional cages and floor pens.
The maintenance of bone strength has been an important issue in the debate over cage use for laying hens. Bone strength depends on adequate mechanical load and cages restrict movement. Four laying crosses (Lohmann White, Lohmann Brown, H&N White, and Rhode Island Red × Barred Plymouth Rock cross hens) were housed in conventional cages or in floor pens equipped with perches and nest boxes to mea...
متن کاملBlood parameters in fattening pigs fed whole-ear corn silage and housed in group pens or in metabolic cages.
The aim of this work was to evaluate the effects of the inclusion of whole-ear corn silage (WECS) in diets for advanced fattening heavy pigs (substitution for part of the dry corn and wheat bran) allocated or not in metabolic cages on the main blood parameters. The high-moisture shelled corn is largely used in pig feeding while WECS is less often used despite the fact that it increases the DM c...
متن کاملInvasive and noninvasive measurement of stress in laying hens kept in conventional cages and in floor pens.
Measurements of the heterophil:lymphocyte (H/L) ratio (invasive technique) and corticosterone in yolk and albumen (noninvasive techniques) were used to measure stress in 3 commercial laying strains, Lohmann White (LW), H&N White (HN), Lohmann Brown (LB), and a noncommercial cross (CR) between Rhode Island Red (male) and Barred Plymouth Rock (female), kept in conventional cages or floor pens. Al...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1963
ISSN: 0032-5791
DOI: 10.3382/ps.0420058