2004 Spring Meeting of the Wpsa Uk Branch Papers

Classen, H. L.; Annett, C. B.; Schwean-Lardner, K.; Gonda, R.; Derow, D.

doi:10.1080/00071660410001698137

Cited by 28 publications

(18 citation statements)

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“…In this work, the heaviest birds at 126 d were reared under 14 L:10 D. In broilers, improved feed efficiency under shorter daylengths could be due to a number of physiological changes that take place during the dark period. Metabolic rate declines which reduces energy requirements [ 29 , 30 , 31 ] activity reduces [ 18 , 20 , 21 ] and melatonin, which aids in sleep regulation [ 32 , 33 ] and improves feed efficiency, peaks during the dark period [ 20 , 34 ] This may possibly impact feed efficiency because of the impact of proper melatonin circulation on endocrine status in the body [ 35 ]. A primary difference between the two species is age, and turkeys are closer to the age of sexual maturity than are broilers.…”

Section: Resultsmentioning

confidence: 99%

Basing Turkey Lighting Programs on Broiler Research: A Good Idea? A Comparison of 18 Daylength Effects on Broiler and Turkey Welfare

Schwean-Lardner

Vermette

Leis

et al. 2016

Animals

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Simple SummaryAltering daylength in a poultry management program is a simple tool that can have immense impacts on productivity and bird welfare. It is not uncommon for lighting data derived from broiler research to be extrapolated to turkey production. This review of two studies (one with broilers and the second with turkeys), completed in the same research facility using the same lighting programs, shows evidence that some, but not all responses to graded daylengths are similar between these two species. It defines that daylength choices for turkeys should be based on research conducted with turkeys.AbstractDaylength used as a management tool has powerful implications on the welfare of both broilers and turkeys. Near-constant light results in many detrimental impacts, including lack of behavioural rhythms and circadian melatonin rhythms. Both are suggestive that sleep fragmentation could result in birds reared on long photoperiods, which can lead to the same negative health and physiological responses as total sleep deprivation. An indirect comparison of the welfare implications of graded levels of daylength on broilers and turkeys clearly indicate that long daylengths depress welfare by increasing mortality, reducing mobility, increasing ocular pathologies and changing behaviour in both species. Furthermore, long daylengths change melatonin secretion patterns and eliminate behavioural and melatonin circadian rhythms, which were measured in broilers in these works. However, feather pecking in turkeys was reduced when birds were exposed to long daylengths. Exactly how much darkness should be included in a management program to maximize welfare will depend on the species, the age of marketing, and in turkeys, bird gender.

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Section: Resultsmentioning

confidence: 99%

Basing Turkey Lighting Programs on Broiler Research: A Good Idea? A Comparison of 18 Daylength Effects on Broiler and Turkey Welfare

Schwean-Lardner

Vermette

Leis

et al. 2016

Animals

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“…Lighting at early age in birds have little or no effect on hormonal system, it merely aids birds' activeness including feed intake, growth, and physical and physiological activities [15,41,42]. Subsequently, increase in lighting periods and light intensity may cause tiredness, cannibalism, immune responses, leg abnormalities and even death [41,[43][44][45][46][47].…”

Section: Lightingmentioning

confidence: 99%

Poultry Housing and Management

Oloyo¹,

Ojerinde²

2020

Poultry - An Advanced Learning

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Majority of the people in the poorest regions of the tropics rely on poultry production as their major source of protein supply. However, poultry production is hindered by the harsh environmental conditions in this regions therefore, reducing the daily supply of protein. It is believed that understanding heat stress in birds by paying detail attention to the sources of heat generation in a poultry house can help manage the heat stress situation in this region. This text reviews the internal climatic conditions of the poultry houses, how the birds respond to them, and their implications for heat management in poultry production. Thus, it provides pertinent information for guidance on parameters for open poultry houses architectural design that ensures optimum climatic conditions that will alleviate heat stress problem in poultry production in hot and humid climate.

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“…Application of continuous lighting and intermittent lighting programs do not constitue any different results in terms of body weight (Altan et al, 1998;Bolukbasi and Yilmaz, 2003;Rahimi et al, 2005;Ilhan and Yetisir, 2009). It is reported that the intermittent lighting application (2A; 2K) is superior to the application of continuous illumination (23A: 1K) (Classen et al, 1991;Classen et al, 2010) however when it comes to the need of darkness for animals, it was stated that the body weight was lowest in long-term (12A: 12K) application of darkness (Abbas et al, 2008). Reducing the duration of luminosity in the early period affects positively the foot development and decreases mortality rate however, it affects the chicks negatively in terms of the body weight gain (Sanotra et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

“…Although it is possible to classify lighting programs from different angles, a classification made in the form of continuous, discrete and restricted lighting programs is in practice (Baser and Yetisir, 2010). It has been found that continuous light application, which has been widely used in broiler breeding, creates stress in animals (Rozenboim et al, 2010;Classen et al, 2010). Reduced lighting time and light intensity decreases mortality rates (Classen and Riddell, 1989;Renden et al, 1991;Blair et al, 1993;Sanotra et al, 2002;Olanrewaju et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Reproductive Performance of Four Varieties of Indigenous Aseel Chicken Under Different Rearing Systems

2020

THE JAPS

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The experiment was carried out to evaluate effects of point Light Emitting Diode (LED) lights source attached to the feeders and drinkers on the broiler performance compared with the standard ceiling with the bulb in environment controlled house with two clusters. Total of 3360 chicks were divided into 2 groups (control and experimental) consisting 3 replicates of 560 chicks with 12.5 birds/m 2 stocking density. Although, light intensity was measured as 18 lux at the level of feeders for the control group, it was measured 82 lux inside the feeders, 12 lux at the outer edge of them, while the measuring was showing 1 lux at 15 cm distance from the feeders 8 lux at the water dropper and zero in other areas for the experimental group. Standard rearing techniques and commercial diets were used during experimental period and parameters such as growth performance, feed conversion ratio (FCR) and mortality of broiler chicks were determined. The mean chick weight at the beginning of the experiment was similar in the control and experimental groups. There was no difference between lighting applications at the age of first week, however, at later stages, body weight (BW) was recorded significantly higher (P≤0.05, P≤0.01) in LED illumination treated group compared to control group. No significant differences were observed in feed intake and FCR between lighting treatments. In 42 day old, feed conversion ratios in control and LED lighting treated group were determined as 1.651 and 1.607, respectively (P>0.05). The mortality rates of control and LED lighting treated groups were found to be 5.24 and 3.51 (P≤0.05) at the age of 42 days. No negative effect of Point LED lights system on weekly body weight gain, feed intake, and feed conversion ratios were observed, but a positive effect on cumulative body weight and mortality. Therefore, pointed LED can be used as a lighting system in broiler production being cost effective without compromising the productive performance.

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2004 Spring Meeting of the Wpsa Uk Branch Papers

Cited by 28 publications

References 1 publication

Basing Turkey Lighting Programs on Broiler Research: A Good Idea? A Comparison of 18 Daylength Effects on Broiler and Turkey Welfare

Basing Turkey Lighting Programs on Broiler Research: A Good Idea? A Comparison of 18 Daylength Effects on Broiler and Turkey Welfare

Poultry Housing and Management

Reproductive Performance of Four Varieties of Indigenous Aseel Chicken Under Different Rearing Systems

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