Results 201 to 210 of about 15,944 (241)
Some of the next articles are maybe not open access.
Pharmacokinetics of levamisole in broiler breeder chickens
Journal of Veterinary Pharmacology and Therapeutics, 2006The pharmacokinetics of levamisole was studied in 20 broiler breeder chickens (chickens that give eggs to breed broilers). A single dose of levamisole (40 mg/kg) was administered orally or intravenously to chickens before the onset of egg production, prelay (age = 22 weeks), and repeated at the peak of egg production (age = 32 weeks).
H, El-Kholy +3 more
openaire +2 more sources
Parameters for quantification of hunger in broiler breeders
Physiology & Behavior, 2003The commercial restricted feeding programme of broiler breeders has a major negative effect on welfare, as the birds are continuously hungry. Objective parameters of hunger are needed to evaluate new management or feeding systems that may alleviate hunger and thus improve broiler breeder welfare.
de Jong, I.C. +2 more
openaire +2 more sources
A review of lighting for broiler breeders
British Poultry Science, 2006Lighting programmes recommended for broiler breeders are very similar to those advocated for laying hens.
openaire +2 more sources
Illuminance and egg production in broiler breeders
British Poultry Science, 20091. Ross broiler breeders were reared at a nominal illuminance of 15, 20 or 45 lux and transferred to a nominal illuminance of 25, 55 or 70 lux at 20 weeks. 2. There were no significant interactions between the response to illuminance during rearing and in lay.
P D, Lewis, R, Danisman, R M, Gous
openaire +2 more sources
On the composition of gastroliths from broiler breeders
Journal of Animal Physiology and Animal Nutrition, 2017SummaryThe purpose of this study was to ascertain the composition and origin of certain gastroliths or gizzard stones from broiler breeders (Gallus gallus domesticus). Fourier transform infrared spectroscopy (FTIR) and X‐ray powder diffraction techniques were used as analysis tools. The main components resulted to be organic fibre and minerals referred
P. Martín‐Ramos +4 more
openaire +2 more sources
Diagnosis, Pathology, and Etiology of Tenosynovitis in Broilers and Broiler Breeders
Avian Diseases, 1972Tenosynovitis virus isolated from the leg tendons of broilerbreeder replacement chickens produced enlarged, firm, and partially nonfunctional leg tendons in broiler chicks, following footpad (FP), intramuscular (IM), and intraperitoneal (IP) inoculation.
openaire +2 more sources
A Case of Aspergillosis in a Broiler Breeder Flock
Avian Diseases, 2002A case of aspergillosis in a broiler breeder flock having respiratory and nervous system problems caused by Aspergillus fumigatus and Aspergillus niger is documented. Dyspnea, hyperpnea, blindness, torticollis, lack of equilibrium, and stunting were observed clinically.
Mehmet, Akan +4 more
openaire +2 more sources
Encephalomalacia in a Flock of Broiler Breeder Hens
Avian Diseases, 1981Incidence of vitamin E selenium-responsive disease problems in chickens has increased dramatically in recent years. In many instances, these problems have occurred even though adequate levels of vitamin E and selenium were present in the feed (3). Encephalomalacia usually occurs in young chickens between three and eight weeks of age.
R K, Page, G N, Rowland, P B, Bush
openaire +2 more sources
Photoperiod and oviposition time in broiler breeders
British Poultry Science, 20041. Oviposition times were recorded for broiler breeder hens under 8-, 10-, 11-, 12-, 13-, 14- and 16-h photoperiods. 2. Mean oviposition time (MOT) was delayed relative to dawn by approximately 0.5 h for each 1-h increase in photoperiod up to 14 h, but was similar for 14- and 16-h photoperiods. However, the 0.5 h/h regression for the time when half the
P D, Lewis, D, Backhouse, R M, Gous
openaire +2 more sources
Acute pectoral myopathy in broiler breeders
Avian Pathology, 1982An acute myopathy is described which principally affects the superficial pectoral muscle (Musculus pectoralis) of broiler breeders between 12 and 20 weeks of age. The disease is sporadic and associated with rapid death. The lesion is characterised histologically by a severe my o degeneration but with little or no cellular response. The cause is unknown.
openaire +2 more sources