Results 21 to 30 of about 171,942 (306)
Across-Line SNP Association Study for Direct and Associative Effects on Feather Damage in Laying Hens [PDF]
, 2010 An association study between SNP markers and feather condition score on the back, rump and belly of laying hens was performed. Feather condition score is a measure of feather damage, which has been shown to be closely related to feather pecking behaviour
Bovenhuis, H. +17 more
core +1 more source
Motivation to dust-bathe of laying hens housed in cages and in aviaries
Animal, 2007 New housing systems for commercial egg production, furnished cages and non-cage systems, should improve the welfare of laying hens. In particular, thanks to the presence of a litter area, these new housing systems are thought to satisfy the dust-bathing ...
S. Colson, C. Arnould, V. Michel
doaj +1 more source
Oxytocin in the Neurohypophysis of the Laying Hen [PDF]
Nature, 1960 ALTHOUGH it has been well known that the administration of posterior lobe hormones induces premature oviposit ion in the hen, Gallus domesticus 1,2, as in other fowls3, it remains undetermined whether the hormone(s) plays an essential part in normal oviposition.
K, TANAKA, S, NAKAJO
openaire +2 more sources
CHANGES IN THYROID HORMONES DURING THE EGG LAYING CYCLE IN FAYOUMI HENS [PDF]
Assiut Veterinary Medical Journal, 1990 T, and The aim of the present study was to determine the levels of T TSH in the serum of laying and non laying Fayoumi chickens. The biological and T, was also measured in these chicken to half life of exogenous T elucidate the relationship between the ...
NAHED E. EL-TOUKHY +3 more
doaj +1 more source
Threonine requirements of laying hens
Poultry Science, 1998 In order to determine the Thr requirement of laying hens, two experiments were conducted using laying performance and plasma Thr concentration as parameters. At 29 and 39 wk of age, 100 and 600 laying hens in Experiments 1 and 2, respectively, with average BW and high egg production rate, were randomized, housed in individual cages, and given free ...
T, Ishibashi +5 more
openaire +2 more sources
Differentially expressed genes for aggressive pecking behaviour in laying hens [PDF]
, 2009 Background Aggressive behaviour is an important aspect in the daily lives of animals living in groups. Aggressive animals have advantages, such as better access to food or territories, and they produce more offspring than low ranking animals.
Janss, Luc +11 more
core +1 more source
Divergent selection on feather pecking behaviour in laying hens (Gallus gallus domesticus) [PDF]
, 2001 A selection experiment was initiated in 1996 in which selection for (HP line) and against (LP line) feather pecking was performed. The foundation stock was a White Leghorn layer strain established in 1970 and maintained since then as a random bred ...
P. Sørensen +5 more
core +2 more sources
Siliao yanjiu, 2023 The experiment was to investigate the effect of fucoidan on production performance, egg quality and antibody level of laying hens in late laying period. A total of 240 laying hens aged 50 weeks were randomly divided into four groups, with five replicates
GUO Li-wei, LI Peng-cheng, YANG Gui-jun
doaj
Application of Malathion to the Laying Hen
Poultry Science, 1968 Abstract INTRODUCTION THE increased use of pesticides in and around the poultry house has paralleled the increase in other areas of animal and plant agriculture in the United States. Still, the use of pesticides is not equally viewed by everyone.
W W, Marion, J M, Ning, S M, Ning
openaire +2 more sources
The Journal of Poultry Science, 2017 A trial was conducted to investigate the effects of dietary mannan level and β-mannanase supplementation on egg production performance, nutrient retention and blood metabolites of laying hens.
Myung H. Ryu +7 more
doaj +1 more source