Brooding temperatures for chicks acclimated to heat during incubation: effects on post-hatch intestinal development and body weight under heat stress

Akşit, Mustafa; Yalçın, Servet; Yenisey, Çiğdem; Özdemir, Demir

doi:10.1080/00071668.2010.495746

Cited by 18 publications

(12 citation statements)

References 22 publications

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“…This result was consistent with the results of both long-term hightemperature, environment-treated studies (Piestun et al, 2008;Akşit et al, 2010;Yalçin et al, 2010) and short-term high-temperature, environment-treated studies (Moraes et al, 2004;Yahav et al, 2004a and2004b;Collin et al, 2007). By contrast, there are few studies suggesting that the high temperature applied during incubation has an effect on the hatching weight in broilers.…”

Section: Discussionsupporting

confidence: 89%

Effects of thermal manipulations during embryogenesis of broiler chickens on developmental stability, hatchability and chick quality

Narinç

Erdoğan

Tahtabiçen³

et al. 2016

Animal

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Stress based on high temperature and humidity reduces the production performance of fast-growing broilers and causes high mortality. Temperatures higher than optimum have been applied to broilers in the embryonic period in order to overcome thermal stress. This study was conducted to investigate the effects of exposure to two long-term high-thermal environments on the developmental stability of embryonic growth, hatchability and chick quality. For this purpose, 600 broiler eggs were incubated. Treatments consisted of eggs incubated at 37.8°C at 55% relative humidity throughout (control), heated to 39.6°C at 60% relative humidity for 6 h daily from 0 to 8th day, and heated to 39.6°C at 60% relative humidity for 6 h daily from the 10 to 18th day. Embryo weights and lengths of face, wing, femur, tibia and metatarsus were measured daily between the 10th and 21st day of the experiment. Daily relative asymmetry values of bilateral traits were estimated. The hatchability, the weight of the 1-day-old chicks and chick quality were determined. In conclusion, no negative effects of the treatments of the long-term high-thermal environment in the early and late stages of incubation for epigenetic adaptation were determined on the embryo morphology, development stability and weight of the chick. Moreover, regressed hatchability of embryos that were exposed to a long-term high-thermal environment was detected. Especially between the 10 and 18th day, the thermal manipulation considerably reduced the quality of the chicks. Acclimation treatments of high temperature on the eggs from cross-breeding flocks should not be made long term; instead, short-term treatments should be made by determining the stage that generates epigenetic adaptation.Keywords: epigenetic adaptation, heat stress, broiler, relative asymmetry, chick quality ImplicationsThe current study was performed to determine the effects of thermal manipulation on the developmental stability of the embryo, hatchability and chick quality. Negative effects of treatments of a long-term high-thermal environment in incubation were not determined on the embryo characteristics, but this treatment negatively affected both hatchability and chick quality. IntroductionAs a result of the long-term genetic improvement studies, the performance of broiler chickens has reached the current position (Baéza et al., 2012;Shaddel Telli et al., 2012). However, this development has led to an increase in sensitivity of the broilers to environmental factors, and has led to the weakening of their adaptability to adverse conditions (Uni and Yahav, 2010). The main environmental factors that cause loss of productivity and high mortality rates in poultry is heat stress, which is caused by high environmental temperature and humidity (Terim Kapakin et al., 2013). The feed consumption decreases in birds that are exposed to heat stress, and yield losses are experienced accordingly (Yalçin et al., 1997). In order to fight against heat stress, resistant genotypes should be developed through breeding, or the ...

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Section: Discussionsupporting

confidence: 89%

Effects of thermal manipulations during embryogenesis of broiler chickens on developmental stability, hatchability and chick quality

Narinç

Erdoğan

Tahtabiçen³

et al. 2016

Animal

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“…The exposure of eggs to high temperatures (38.50ºC) for 4-6 hours between the 10 th and 16 th days of incubation may improve the capacity to adapt to heat stress in the fifth week (AKSIT et al, 2010). YALÇIN et al (2010) reported better adaptation to high temperatures in broilers between the third and sixth post-hatching weeks, minimizing the negative effects caused by heat stress on slaughter weight and breast yield after exposure to temperatures of 39.60ºC for 6h from the tenth to the eighteenth days of incubation.…”

Section: Resultsmentioning

confidence: 99%

Thermal stimulation of Ross®-lineage embryos on a commercial scale

et al. 2016

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“…This depressed feed intake would decrease bodily heat production and could help to minimize heat stress. In addition Aksit et al (2010) observed that when eggs were heat acclimatised (incubated at 39.5°C for 6 h daily from d 10 to d 18) and these chicks were kept at a high brooding temperature of 35°C they had lower H:L ratios than 'control' chicks incubated at 37.5°C. Lower H:L ratios also suggest that heat acclimatised birds may cope better with heat stress.…”

Section: Broodingmentioning

confidence: 99%

Scientific report updating the EFSA opinions on the welfare of broilers and broiler breeders

Jong

Berg

Butterworth

et al. 2012

EFS3

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The EFSA AHAW panel is requested to develop several scientific opinions concerning animal based measures to assess the welfare of livestock animals. The main objective of this report is to review the broiler welfare literature to identify gaps and potential areas to strengthen and update three SCAHAW and EFSA opinions: i) The welfare of chickens kept for meat production (broilers) (SCAHAW, 2000), ii) Influence of genetic parameters on the welfare and resistance to stress of commercial broilers (EFSA, 2010), iii) Welfare aspects of the management and housing of the grand-parent and parent stocks raised and kept for breeding purposes (EFSA, 2010). The literature review was done by a group of authors and reviewers, under the supervision of an editorial team. A large number of new scientific references are quoted. Regarding the first and oldest opinion, this review presents 47 amended and new conclusions. In addition, it suggests twelve new recommendations and proposes a list of hazards. Especially the paragraphs on behavioural restriction, light, stocking density and environmental enrichment are updated with new information from a large number of new scientific references. Regarding the second opinion, nine new conclusions are proposed. Recommendations of the previous EFSA report are further supported by new information, and one new recommendation is a suggestion to further study the role of incubation conditions on welfare issues such as gait abnormalities, thermal discomfort and ascites. A limited number of new hazards are proposed. Regarding the third opinion, four new conclusions are proposed. Recommendations of the previous EFSA report are also in this case further supported by new information. One new recommendation is a suggestion to further study the impact of management on forced mating behaviour. A couple of new hazards are proposed.

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Brooding temperatures for chicks acclimated to heat during incubation: effects on post-hatch intestinal development and body weight under heat stress

Cited by 18 publications

References 22 publications

Effects of thermal manipulations during embryogenesis of broiler chickens on developmental stability, hatchability and chick quality

Effects of thermal manipulations during embryogenesis of broiler chickens on developmental stability, hatchability and chick quality

Thermal stimulation of Ross®-lineage embryos on a commercial scale

Scientific report updating the EFSA opinions on the welfare of broilers and broiler breeders

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