High ambient temperature influences eggshell quality and calbindin-D28k localization of eggshell gland and all intestinal segments of laying hens

Ebeid, Tarek A.; Suzuki, Toshihiko; Sugiyama, Toshie

doi:10.3382/ps.2011-01898

Cited by 118 publications

(94 citation statements)

References 29 publications

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“…The weight of the egg was significantly lower in hens maintained at room temperature at 28 o C compared to those kept at 20 o C. According to the authors, the fact is due to the negative effect of high temperature on feed consumption which decreases in birds under thermal stress. Mack et al (2013) and Ebeid et al (2012) observed reduction on egg weight in laying hens exposed to thermal stress.…”

Section: Resultsmentioning

confidence: 99%

Technical Feasibility of the Acclimatization System in Aviary of Posture: A Case Study

Pereira

Kodaira²,

Bueno³

et al. 2017

Eng. Agríc.

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ABSTRACT:The objective of this study was to compare the performance of laying hens between automated aviaries, one with and another without acclimatized system. On a daily basis it was registered in each aviary the mortality, the egg production, and the feed consumption. The variables of the dry bulb temperature, relative humidity and black globe temperature were registered every 30 minutes using the thermos hygrometer. Every 28 days ninety eggs from each aviary were collected randomly and the variables egg weight, shell weight, shell thickness and Haugh Unit were registered. The consumption and quality of the electrical energy supply were monitored every 30 minutes using registers of electrical magnitude. The results showed that the acclimatization system consumes more electrical energy; however it provides thermal environment more suitable for bird raising, resulting in better production and quality of the eggs. The quality of the electrical energy supply was not maintained, since several interruptions occurred which resulted in higher mortality in the acclimatized aviary. It was concluded that the acclimatization system is technically feasible, since the electrical energy supply is guaranteed.

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Section: Resultsmentioning

confidence: 99%

Technical Feasibility of the Acclimatization System in Aviary of Posture: A Case Study

Pereira

Kodaira²,

Bueno³

et al. 2017

Eng. Agríc.

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“…(Mahmoud et al, 1996;Zhou et al, 1998;Mashaly et al, 2004;Lin et al, 2006). Heat stress has been demonstrated to decrease production performance in layers causing reduced eggshell thickness, egg shell thickness, increased egg breakage and egg weight and percentage (Ebeid et al, 2012).…”

Section: Impact Of Heat Stress On Productionmentioning

confidence: 99%

Assessing and Mitigating the Impact of Heat Stress in Poultry

Pawar¹,

Sajjanar²,

Lonkar³

et al. 2016

Adv. Anim. Vet. Sci.

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| Over the years, development of poultry genotypes is driven mainly aiming higher production at optimal temperatures. However, recent increase in extreme heat wave events and enhanced sensitivity of modern poultry genotypes to heat stress has become a major concern leading to significant economic losses to the poultry industry. In India, per capita consumption of poultry meat and eggs is significantly lower than the minimum recommended by Indian Council of the Medical Research and there is need for significant increase in poultry productivity to fulfil these requirements. Conversely, in sub-tropical countries like India where summer is severe, accomplishing higher production under current scenario is a challenge. Earlier intervention strategies including environmental management and nutritional supplementation have been inconsistent in poultry for managing heat stress. Therefore, there is scope for exploring innovative approaches, including genetic marker-assisted selection of poultry breeds for increased heat tolerance and application of molecular techniques in poultry breeding to improve poultry productivity in a sustainable manner. Hence, keeping in view the present situation, it is essential to understand various cellular and molecular mechanisms involved in poultry production including physiological and immunological aspects of the poultry birds under heat stress using molecular biology tools that can help in development of poultry breeds which are better adapted to changing climate.

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“…The mean eggshell thickness of the side was higher than of the apex (P < 0.05) or bottom (P < 0.001) for normal eggs, whereas for EAA eggs, there were differences among all 3 means: the side thickness was higher than the apex (P < 0.001) or bot tom (P < 0.05), and the bottom thickness was higher than the apex (P < 0.01; Table 3). The thinner eggshell in the summer also could have occurred due to the higher ambient temperatures to which the hens were exposed because thermal comfort interferes with egg production and quality (Mahmoud et al, 1996;Ebeid et al, 2012).…”

Section: Egg Quality Analysismentioning

confidence: 98%

The effect of eggshell apex abnormalities on table egg quality during storage in 2 seasons of the year

et al. 2014

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Mycoplasma synoviae infection of hens has been associated with problems of eggshell quality called eggshell apex abnormalities (EAA). Little is known about the quality of EAA eggs from a commercial point of view, especially during their storage. The study aimed to examine the differences between EAA and normal eggs during storage under controlled conditions in 2 seasons, summer and winter, by comparing internal and external quality parameters. In a conventional egg production farm with white laying hens of varying ages in the city of Bastos, state of São Paulo, Brazil, 232 eggs were used in the summer season and 400 eggs in the winter season. Half of the eggs had EAA, and the other half were considered normal eggs for each season. The eggs were analyzed at 2, 7, 14, 21, and 28 d after being laid and stored from 24.6 to 25.8°C in summer and from 24 to 25°C in winter. There was no difference (P > 0.05) in the average egg weight between EAA and normal eggs at any studied time point, but in both seasons, the weight loss in EAA eggs was higher than in normal eggs. The losses in Haugh unit scores from the first to the last measurements were approximately 40% regardless of egg type or season of production. In comparing eggshell thickness, only the apices of the EAA eggs were thinner (P < 0.0001) than normal eggs in the summer, but in the winter, the EAA egg apices (P < 0.0001) and sides (P = 0.03) were both thinner. The presence of EAA did not affect the eggshell weight (P > 0.05) or eggshell percentage (P > 0.05). The eggshell strength of the EAA eggs was lower (P < 0.0001) than normal eggs in both the summer (16.57%) and winter (19.86%). The presence of EAA did not affect the internal quality of the egg, but was related to a greater loss of external quality and weight during storage.

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High ambient temperature influences eggshell quality and calbindin-D28k localization of eggshell gland and all intestinal segments of laying hens

Cited by 118 publications

References 29 publications

Technical Feasibility of the Acclimatization System in Aviary of Posture: A Case Study

Technical Feasibility of the Acclimatization System in Aviary of Posture: A Case Study

Assessing and Mitigating the Impact of Heat Stress in Poultry

The effect of eggshell apex abnormalities on table egg quality during storage in 2 seasons of the year

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