Effect of prenatal temperature conditioning of laying hen embryos: Hatching, live performance and response to heat and cold stress during laying period

Kamanli, Serdar; Durmuş, İsmail; Yalçın, Servet; Yıldırım, Ümran; Meral, Öğünç

doi:10.1016/j.jtherbio.2015.04.001

Cited by 12 publications

(12 citation statements)

References 36 publications

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“…These medium-to long-term effects of short cold exposures during incubation have been shown to trigger heat production through modifications in thermoregulatory mechanisms via a change in neuronal receptors sensitivity in the hypothalamus (Nichelmann and Tzschentke, 2002), and an increase in plasma triiodothyronine T3 concentration (Kamanli et al, 2015). Finally, the impacts of cold exposure during incubation on subsequent chick behavior were reported by Bertin et al (2018).…”

Section: Temperature Decreases During the Egg Incubationmentioning

confidence: 99%

Early Phenotype Programming in Birds by Temperature and Nutrition: A Mini-Review

et al. 2022

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Early development is a critical period during which environmental influences can have a significant impact on the health, welfare, robustness and performance of livestock. In oviparous vertebrates, such as birds, embryonic development takes place entirely in the egg. This allows the effects of environmental cues to be studied directly on the developing embryo. Interestingly, beneficial effects have been identified in several studies, leading to innovative procedures to improve the phenotype of the animals in the long term. In this review, we discuss the effects of early temperature and dietary programming strategies that both show promising results, as well as their potential transgenerational effects. The timing, duration and intensity of these procedures are critical to ensure that they produce beneficial effects without affecting animal survival or final product quality. For example, cyclic increases in egg incubation temperature have been shown to improve temperature tolerance and promote muscular growth in chickens or fatty liver production in mule ducks. In ovo feeding has also been successfully used to enhance digestive tract maturation, optimize chick development and growth, and thus obtain higher quality chicks. In addition, changes in the nutritional availability of methyl donors, for example, was shown to influence offspring phenotype. The molecular mechanisms behind early phenotype programming are still under investigation and are probably epigenetic in nature as shown by recent work in chickens.

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Section: Temperature Decreases During the Egg Incubationmentioning

confidence: 99%

Early Phenotype Programming in Birds by Temperature and Nutrition: A Mini-Review

et al. 2022

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“…For example, chickens that are exposed to a short cold challenge exactly during the HPT and HPA axis development in the egg are better heat-producers after hatching and later in life while in contrast, chickens exposed to similar short-duration d heat challenges prenatally cope better in higher ambient temperatures later in life (Kamanli et al, 2015;Loyau et al, 2015;Morita et al, 2016;Piestun et al, 2009;Piestun et al, 2008a;Piestun et al, 2008b;Piestun et al, 2015;Shinder et al, 2009;Yahav et al, 2004). For non-domesticated species, Nord & Nilsson (2011) and DuRant et al (2011), found that blue tits and wood ducks (Aix sponsa) that were incubated in cold temperature throughout the incubation period had higher metabolic rate close to independence, which was interpreted in the same wayi.e.…”

Section: Epigenetic Adaptationmentioning

confidence: 99%

Endocrinology of thermoregulation in birds in a changing climate

Ruuskanen¹,

Hsu²,

Nord³

2019

Preprint

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The ability to maintain a (relatively) stable body temperature in a wide range of thermal environments is a unique feature of endotherms such as birds. Endothermy is acquired and regulated via various endocrine and molecular pathways, and ultimately allows wide aerial, aquatic, and terrestrial distribution in variable environments. However, due to our changing climate, birds are faced with potential new challenges for thermoregulation, such as more frequent extreme weather events, lower predictability of climate, and increasing mean temperature. We provide a compact overview on thermoregulation in birds and its endocrine and molecular mechanisms, pinpointing gaps in current knowledge and recent developments, focusing especially on non-model species to understand the generality of, and variation in, mechanisms. We highlight plasticity in thermoregulation and underlying endocrine regulation, because thorough understanding of plasticity is key to predicting responses to changing environmental conditions. To this end, we discuss how changing climate is likely to affect avian thermoregulation and associated endocrine traits, and how the interplay between these physiological processes may play a role in facilitating or constraining adaptation to a changing climate. We conclude that while the general patterns of endocrine regulation of thermogenesis are quite well understood, at least in poultry, the molecular and endocrine mechanisms that regulate e.g. mitochondria function and plasticity of thermoregulation over different time scales (from transgenerational to daily variation) need to be unveiled. Plasticity may ameliorate climate change effects on thermoregulation to some extent, but the increased frequency of extreme weather events, and associated in resource availability, may be beyond the scope and/or speed for plastic responses. This could lead to selection for more tolerant phenotypes, if the underlying physiological traits harbour genetic and individual variation for selection to act on – a key question for future research.

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“…Few studies reported that TM of low temperature or cold exposure during embryogenesis supported birds to cope with low ambient temperature and caused positive effects on growth in post-hatch broilers (11,12). Cyclic low incubation temperature (36.5 • C) modified thyroid activity with an increased plasma thyroxine level under cold stress in posthatch hens (13). However, few studies focused on the effects of TM on layer-type embryonic development.…”

Section: Introductionmentioning

confidence: 99%

Thermal manipulation modifies embryonic growth, hepatic free amino acid concentrations, and hatching performance in layer-type chicks

Han

Li²,

Li³

et al. 2022

Front. Vet. Sci.

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Thermal manipulation (TM) of incubation temperature has been demonstrated to alter metabolism and post-hatch thermotolerance in broiler strains (meat-type chickens). Fewer reports were focused on layer-type chickens and there was no report on amino acid metabolism during TM in layer-type embryos. In this study, we investigated the effects of TM on embryonic development, hepatic amino acid metabolism, and hatching performance in layer-type chickens. Fertilized eggs were incubated under control thermoneutral temperature (CT, 37.6°C) and TM with high temperature (TMH, 39°C, 8 h/day) or low temperature (TML, 20°C, 1 h/day) from embryonic day (ED) 8 to ED 15. The embryonic weight and relative embryonic weight (yolk-free embryonic weight to the initial egg weight) significantly declined in the TML group at ED 13 (P < 0.01) and ED 16 (P < 0.0001), and were significantly increased (P < 0.001) in the TMH group at ED 16, in comparison with the embryos in the CT group. The concentrations of all hepatic free amino acids were significantly increased (P < 0.01) with embryonic development. Interestingly, TMH and TML caused similar effects on hepatic amino acid metabolism, in which most of the essential and non-essential amino acids were significantly declined (P < 0.05) under TM treatments at ED 13 but not affected at ED 16. Until hatching, TML, but not TMH, caused a significant (P < 0.05) delay (31–38 min/day from ED 8) in incubation duration. The hatchability in the TML group was lower than the other two groups, which indicated that 20°C as cold stimulation was not suitable for layer embryos. The body weight, yolk weight, yolk-free body mass, and chick quality were not affected by TM treatments. However, the relative weight of the liver, but not the heart, was significantly reduced (P < 0.05) at hatching by TML treatment. In conclusion, TML, but not TMH, caused to delay in embryogenesis and affected the internal organ of chicks at hatch. Similar changes in amino acid metabolism under TMH and TML indicated that thermal stress induced by both high and low extreme ambient temperatures influences embryonic amino acid metabolism in a similar fashion in layer-type embryos.

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Effect of prenatal temperature conditioning of laying hen embryos: Hatching, live performance and response to heat and cold stress during laying period

Cited by 12 publications

References 36 publications

Early Phenotype Programming in Birds by Temperature and Nutrition: A Mini-Review

Early Phenotype Programming in Birds by Temperature and Nutrition: A Mini-Review

Endocrinology of thermoregulation in birds in a changing climate

Thermal manipulation modifies embryonic growth, hepatic free amino acid concentrations, and hatching performance in layer-type chicks

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