Effects of chronic and repeated corticosterone administration in rearing chickens on physiology, the onset of lay and egg production of hens

Shini, S.; Shini, A.; Huff, G. R.

doi:10.1016/j.physbeh.2009.04.012

Cited by 100 publications

(89 citation statements)

References 30 publications

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“…The results obtained reinforce the hypothesis that the decreased performance observed in stressed broiler chickens might be related to alterations in the HPA axis function via corticosterone release (Shini & Kaiser, 2008;Shini et al, 2009;Quinteiro-Filho et al, 2010, 2012a, 2012b. Moreover, the observed intestinal inflammation could lead to a decrease in nutritional absorption because of the presence of intestinal lesions and because of sickness-related behaviour by release of certain interleukins (i.e.…”

Section: Discussionsupporting

confidence: 81%

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

et al. 2014

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Overcrowding stress is a reality in the poultry industry. Chickens exposed to long-term stressful situations present a reduction of welfare and immunosuppression. We designed this experiment to analyse the effects from overcrowding stress of 16 birds/m 2 on performance parameters, serum corticosterone levels, the relative weight of the bursa of Fabricius, plasma IgA and IgG levels, intestinal integrity, macrophage activity and experimental Salmonella Enteritidis invasion. The results of this study indicate that overcrowding stress decreased performance parameters, induced enteritis and decreased macrophage activity and the relative bursa weight in broiler chickens. When the chickens were similarly stressed and infected with Salmonella Enteritidis, there was an increase in feed conversion and a decrease in plasma IgG levels in the stressed and Salmonella-infected birds. We observed moderate enteritis throughout the duodenum of chickens stressed and infected with Salmonella. The overcrowding stress decreased the macrophage phagocytosis intensity and increased Salmonella Enteritidis counts in the livers of birds challenged with the pathogenic bacterium. Overcrowding stress via the hypothalamic-pituitary-adrenal axis that is associated with an increase in corticosterone and enteritis might influence the quality of the intestinal immune barrier and the integrity of the small intestine. This effect allowed pathogenic bacteria to migrate through the intestinal mucosa, resulting in inflammatory infiltration and decreased nutrient absorption. The data strengthen the hypothesis that control of the welfare of chickens and avoidance of stress from overcrowding in poultry production are relevant factors for the maintenance of intestinal integrity, performance and decreased susceptibility to Salmonella infection.

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Section: Discussionsupporting

confidence: 81%

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

et al. 2014

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“…Increased metabolites damage cell structure. This condition is defined as oxidative stress [30,31] . MDA is end product of lipid peroxidation in cell and an important indicator of stress [32] .…”

Section: Discussionmentioning

confidence: 99%

Effects of Cage and Floor Housing Systems on Fattening Performance, Oxidative Stress and Carcass Defects in Broiler Chicken

Şimşek¹,

Erişir²,

Çiftçi³

et al. 2014

Kafkas Univ Vet Fak Derg

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SummaryThis study was carried out to compare floor with cage housing systems used for broiler chicken production in terms of performance, some oxidative stress parameters and carcass defects. For this purpose, two cage and two floor housing farms were monitored simultaneously during summer, autumn and winter seasons. Capacities of farms in each housing system were 40.000 and 25.000 chickens. At the end of each summer, autumn and winter season, 15 broilers were selected in both housing systems with capacity of 25.000 chickens for carcass and oxidative stress parameters. Blood samples were taken in slaughtering period from chickens slaughtered with decapitation. Broiler reared in cage housing showed higher live weight at 7 and 14 days (P≤0.05). But this difference disappeared after three weeks, while slaughter weights were found to be similar at both systems. Better feed conversion ratio (FCR) and carcass yield were obtained in floor housing (P≤0.01). Serum malondialdehyde (MDA) level increased in cage housing (P≤0.01). Other carcass traits and antioxidant activity were found to be similar between groups (P>0.05). Cases of wing fractures, wing and breast bruising were found to be higher in cage housing (P≤0.05). Case of shank and drumstick bruising slightly increased in floor housing (P=0.074). The incidence and severity of food pad lesions increased in floor housing (P≤0.01). The results of this study indicated that floor housing had shown better performance and carcass quality at examined production capacities. Keywords: Broiler, Floor housing, Cage housing, Performance, Season Kafes ve Yer Sistemlerinin Etlik Piliç Üretiminde Besi Performansı, Oksidatif Stres ve Karkas Kusurları Üzerine Etkileri ÖzetBu araştırma, etlik piliç üretiminde kullanılan yer ve kafes sistemlerini performans, bazı oksidatif stres parametreleri ve karkas kusurları bakımından karşılaştırmak için yürütülmüştür. Bu amaçla, 2 yer ve 2 kafes kümesi yaz, sonbahar ve kış sezonları süresince eş zamanlı olarak takip edilmiştir. Her sistemde kümeslerin kapasitesi 40.000 ve 25.000 piliç şeklindedir. Yaz, sonbahar ve kış sezonları sonunda, 25.000 kapasiteli her iki yetiştirme sisteminden karkas ve oksidatif stres parametreleri için 15 piliç seçilmiştir. Kan numuneleri boyun uçurma yöntemi ile kesimi yapılan piliçlerden kesim esnasında alınmıştır. Kafes sisteminde yetiştirilen piliçler 7 ve 14. günlerde daha fazla canlı ağırlık göstermişlerdir (P≤0.05). Bu farklılık üçüncü haftadan sonra ortadan kaybolmuş ve kesim ağırlıkları her iki sistemde benzer bulunmuştur. Yer sisteminde yemden yararlanma ve karkas randımanı iyileşmiştir (P≤0.01). Serum malondialdehit (MDA) seviyesi kafes sisteminde yükselmiştir (P≤0.01). Diğer karkas özellikleri ve antioksidan aktivite araştırma grupları arasında benzer bulunmuştur (P>0.05). Kanat kırığı, kanat ve göğüs morarması olguları kafes sisteminde yüksek tespit edilmiştir (P≤0.05). İncik ve baget morarması olgusu yer sisteminde önemsiz derecede yükselmiştir (P=0.074). Taban yastığı nekrozlarının görülme oranı ve şiddet...

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“…In Little Auks, a higher corticosterone level might also be associated with food deprivation or unfavourable weather conditions (Kidawa et al 2014). Therefore, corticosterone could be used as an established hormonal indicator of an organism's response to stress, but also as an independent experimental factor that simulates the stress reaction (Kitaysky et al 2001;Romero et al 2005;Müller et al 2009a;Shini et al 2009;Spée et al 2011). Experimental manipulations appear to be the best way to predict birds' reactions during unfavourable environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Parent-offspring interactions in a long-lived seabird, the Little Auk (Alle alle): begging and provisioning under simulated stress

2016

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Long-lived seabirds are good models to study the mechanisms that mediate the parent-offspring interactions. Contrary to studies under natural conditions, experimental manipulations allow us to assess the birds' reactions in a short time period. We used the stress hormone corticosterone as an independent experimental factor to simulate the stress reaction, to examine changes in the behaviour of Little Auk chicks and parent birds. In the first experiment, we hypothesised that after enhancement of the corticosterone level Little Auk (Alle alle) chicks intensify their begging performance and attain a higher pre-fledging body mass than the control chicks. In the second experiment, we hypothesized that parent Little Auks with an increased corticosterone level feed their chicks less frequently and spend less time at the colony than their untreated partners and the control birds. We also expected that chicks with one parent implanted with corticosterone fledge later and with a lower body mass than chicks of two untreated parents. The obtained results supported the above hypotheses. We demonstrated that modification of begging performance in Little Auks constitutes an adaptive mechanism that guards against the decrease in the chicks' body condition during stressful periods. Even though the provisioning rate in Little Auks can be regulated according to the chick's needs (expressed by the intensity of the begging display), it appears that adult birds regulate their provisioning strategy primarily according to their body state. The results suggest that parent Little Auks under stressful conditions will decrease their parental effort and redirect the available energy towards self-maintenance. The study provides novel insights into the behaviour of long-lived alcids using an experimental approach on free-living birds.

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Effects of chronic and repeated corticosterone administration in rearing chickens on physiology, the onset of lay and egg production of hens

Cited by 100 publications

References 30 publications

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

Effects of Cage and Floor Housing Systems on Fattening Performance, Oxidative Stress and Carcass Defects in Broiler Chicken

Parent-offspring interactions in a long-lived seabird, the Little Auk (Alle alle): begging and provisioning under simulated stress

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