Diphasic allometric growth of body components in white Leghorn pullets fed ad libitum and restricted diets
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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 کاملComparison of behaviour, performance and mortality in restricted and ad libitum-fed growing rabbits.
The objective of this study was to determine whether rabbits fed in a restricted regimen (75%) showed increased competition for feeding, drinking and use of specific areas of the cages as compared with those provided feed ad libitum. This evaluation was carried out by measuring their space utilisation in the cage, the incidence of agonistic behaviour and rates of mortality. In total, 504 rabbit...
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 کاملبررسی آثار محدودیت غذایی شدید در اوایل دوره پرورش و مکمل اسید آمینه در دوره تغذیه مجدد بر عملکرد جوجه های گوشتی
An experiment was conducted to determine growth and carcass characteristics of male broilers subjected to early feed restriction. Restricted birds were fed equivalent to 1/5*BW0.67 Kcal/day/bird between days 7 and 14. On days 0 to 7 and 14 to 56, all chickens received feed ad-libitum. Diets of feed-restricted birds were supplemented with 15% higher methionin and cystine recommended by NRC (1994...
متن کاملQualitative regional differences in adipose tissue growth and cellularity in male Wistar rats fed ad libitum.
Adipose tissue grows primarily by a combination of increases in fat cell volume (hypertrophy) and in fat cell number (hyperplasia), but the regional growth pattern of white adipose tissue depots in animal species and in the human is still unclear. In this study we characterized fully the age-related changes in adipose tissue growth, composition, and cellularity of four fat depots of male Wistar...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1997
ISSN: 0032-5791
DOI: 10.1093/ps/76.7.1020