LIMESTONE OF BUKIT KAMANG AS A CALCIUM SOURCE FOR LAYING HENS [PDF]
, 2009 A feeding trial was conducted to study the use of natural limestone meal originated from Bukit Kamang located at Agam district of West Sumatra to substitute fresh water oyster shell as the main source of calcium in diet of laying hens. The mineral feed
Khalil, Khalil, Anwar, S
core +2 more sources
Performance of commercial laying hen genotypes on free range and organic farms in Switzerland, France and The Netherlands [PDF]
, 2012 1. A total of 257 farmers with free ranging laying hens (organic and conventional) in Switzerland, France and The Netherlands with 273 flocks were interviewed to determine the relationships between the genotype of the hens, management conditions and ...
van Niekerk, T.G.C.M. +17 more
core +2 more sources
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. +7 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 ...
Su, Guosheng +2 more
core +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
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
Use of perches and nestboxes by laying hens in relation to social status, based on examination of consistency of ranking orders and frequency of interaction [PDF]
, 2001 Four groups of 15-19 adult ISA Brown hens were studied in pens to assess the relationship between social status and use of perches and nestboxes.
Savory, C. J. +5 more
core +1 more source
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