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Article published the March 13, 2024
I. INTRODUCTIONA hen’s physiological patterns including FI and BW trajectory are established by early lay (Muir et al. 2022). Therefore, management tools such as lighting and feeding programs during rearing may offer opportunities to regulate bird size and establish feeding habits by the end of rearing. This may also influence persistency of lay, egg quality and hen health during an extended ...
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Article published the August 8, 2023
I. IntroductionPullet body weight (BW) has significant impact on hen sexual maturity, egg productivity and flock uniformity (Lacin et al. 2009). Australian layer flocks are frequently 100-300 grams heavier than breed standard weight (BSW) (Parkinson et al. 2015). These birds typically lay larger eggs than LW hens and higher BW is symptomatic of bird obesity which can result in the production of ex ...
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Article published the October 21, 2022
I. INTRODUCTION Optimum BW is an important consideration in achieving early maturity, high productivity and uniformity in laying hens (Lacin et al., 2009). Parkinson et al. (2015) noted that it was common for Australian flocks to have an average body weight (BW) 100-300 grams above the breed standard weight (BSW). This higher BW is indicative of bird obesity and is associated with the production o ...
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Article published the June 22, 2021
I. INTRODUCTIONFeed efficiency (FE) is an important production trait in poultry. A commonly used measure of efficiency is feed conversion ratio (FCR), which is defined as feed intake (FI) per unit of egg mass (EM) in laying hens. It is widely recognised that behaviour is an important aspect of the physiological status of animals (Pennisi, 2005). Feeding behaviour may reflect animal meal habit as a ...
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Article published the May 17, 2021
This study investigated the effect of a novel phosphorylated tocopherol mixture (TPM) on the growth performance and meat quality in broiler chickens reared in normal temperatures (NT) or cyclical high temperatures (CHT). Three hundred and sixty Ross 308-day old broilers were housed in groups of 5 in cages (n = 12/treatment). From day of placement until d 35, broilers were assigned to 1 of 3 vitami ...
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Article published the April 27, 2021
I. INTRODUCTIONThe feed efficiency (FE) of commercial laying hens has improved steadily since genetic selection began in earnest, with modern hybrids converting approximately 2.1 kg of feed into 1 kg of eggs. Recent research suggests considerable variation in FI and FE between hens kept under common management and dietary conditions (Akter et al., 2018). Research also indicates that many factors a ...
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Location:New South Wales, Australia
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