(1) The kinds of audience investigated included the mate, unfamiliar females, other females and males with which subjects had had prior visual and auditory contact, and broody hens with and without young.
(2) Plasma concentrations of prolactin and corticosterone were determined in hourly samples collected over a 25-hr period from unrestrained turkey hens exhibiting incubation (broody) behavior.
(3) Under resting conditions thoracic skin temperature (Tths) and metabolic heat production (M) were significantly higher in broody than in non-broody hens, indicating a permanently increased conductance of the brood patch.
(4) The relation between metabolic rate and total peripheral resistance indicated more intense vasodilation for broody hens at the relatively low metabolic rates during moderate cooling, and more intense vasoconstriction for the broody hens at the high metabolic rates during stronger cooling.
(5) Body temperatures, metabolic rate, haemostatic parameters, and cardiovascular reactions to thoracic skin cooling were compared between incubating (broody) and non-broody Bantam hens.
(6) In broody hens, these coolings induced a large, immediate increase in M, no constriction of brood patch vasculature, and a decrease in colonic temperature (Tc).
(7) A higher thoracic skin temperature (Tths) for broody hens compared to non-broody hens suggests that brood patches are the probable site of this increased flow through arteriovenous anastomoses (AVAs).
(8) This treatment did not reduce broody behavior or have any beneficial effect on egg production.
(9) Under resting conditions, without thoracic skin cooling, cardiac output of broody hens was twice that of non-broody hens.
(10) Improved egg production was achieved both through an increase in the rate of egg production and through a reduction in broodiness.
(11) Hens also produced more (P less than .05) eggs when maintained under cyclic temperature conditions, although this observation was tempered by the fact that fewer hens were broody.
(12) Genetic changes in average clutch length, total days lost from broodiness, fertility, and response to cold stress did not have a major influence on semen production in the turkey.
(13) In addition, egg quality, broodiness, floor egg production, and poult weight data were obtained in Experiment 2.
(14) During moderate cooling, vasoconstriction in the feet and wattles of broody hens (but not of non-broody hens) freed non-nutrient blood flow for redistribution to the brood patches.
(15) Synthesis and release rates of prolactin and growth hormone (GH) in the anterior pituitary of laying and incubating broody chickens (Nagoya breed) were determined by a disc electrophoretic technique after in vitro incubation of anterior pituitaries with a labeled amino acid.
(16) In these hens, broodiness was disrupted on day 6 and feeding activity subsequently increased to levels of photorefractory hens.
(17) The RBC1 turkeys had linear increases in the percentage of broody hens during the first 84 and 180 days of production, the average length of the broody period, and the total number of days lost to broodiness during the 180-day period.
(18) When expressed as a deviation from RBC1, positive quadratic curvilinear changes were observed for E turkeys for number of clutches and broody periods, and days lost to broodiness during the first 180 days of production.
(19) Thoracic skin cooling from 35 to 25 degrees C decreased Tths less in broody than in non-broody hens.
(20) An assessment was made of the possible role of hypothalamic 5-hydroxytryptamine (5-HT) in the regulation of prolactin secretion in broody bantam hens.
Hen
Definition:
(n.) The female of the domestic fowl; also, the female of grouse, pheasants, or any kind of birds; as, the heath hen; the gray hen.
Example Sentences:
(1) Whether hen's egg yolk can be used as a sperm motility stimulant in the treatment of such conditions as asthenospermia and oligospermia is subjected for further study.
(2) Studies were conducted to evaluate the effects of acute (24 h) thermal stress on anterior pituitary function in hens.
(3) Lead levels in contents and shells of eggs laid by hens dosed with all-lead shot were about twice those in eggs laid by hens dosed with lead-iron shot.
(4) Unlike most birds of prey, which are territorial and fight each other over nesting and hunting grounds, the hen harrier nests close to other harriers.
(5) In Experiment 1 (summer), hens regained body weight more rapidly, returned to production faster, and had larger egg weights (Weeks 1 to 4) when fed the 16 or 13% CP molt diets than when fed the 10% CP molt diet.
(6) Studies have been made on the activity of glycosidases from eye tissues of developing chick embryos and adult hens.
(7) The results suggest that a cytoplasmic progesterone receptor is present in the pituitary and hypothalamic tissue, as well as in the oviduct magnum, of the hen.
(8) Each diet was fed to five or six individually caged hens for 42 days.
(9) Mortality was less in the N-XL as compared to DB, but NB hens showed 11.7% more mortality than dwarfs.
(10) Raw Target RSM was force fed to 12 hens which were killed after varying time intervals (15 min., 30 min., 60 min.)
(11) A reduction in tibial breaking strength was also found in caged hens, when compared to deep-litter hens.
(12) To investigate the physical state of water in hydrating biological macro-molecules, the dielectric properties of water in hen egg lysozyme pellets with various moisture contents were studied using the thermally stimulated depolarisation currents technique.
(13) The TOCP-treated hens developed clinical signs of neuropathy.
(14) Posterior pituitary extract (0.01-0.5 equivalent) from hens in each of the various stages of the reproductive cycle induced a concentration dependent PRL release.
(15) Is he not going to talk to them for four or eight years?” Henning said.
(16) Data were obtained on hen-day egg production, egg weight, egg mass, egg specific gravity, Haugh units, feed consumption, and feed efficiency.
(17) Hens of the same breed and age reared together on deep litter showed no differences in nest site selection and nesting behaviour regardless of whether they had previously been housed in a deep litter house or in cages.
(18) Though Henning lived in Eccles, Salford, he had many friends in Bolton.
(19) The present study determined the amount and types of glycosaminoglycans and collagen concentrations in follicles of the domestic hen.
(20) Brown layer hens (BC and HC strains) and white layer hens (WL strain) orally infected with the H-162 strain of the egg-drop syndrome 1976 virus developed few clinical signs except for abnormal egg production.