Effect of increased temperature at the beginning of incubation on day-old chick quality in broilers

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of increased temperature at the beginning of incubation on day-old chick quality in broilers

Popis výsledku v původním jazyce

The significance of conditions during incubation period for broiler chickens has been recognized to be critical due to the fact that broilers spend up to 40% of their total life inside the egg during incubation. Thus, anything that can optimize posthatch growth and development may have great scientific and practical interest. The present study was therefore conducted to elucidate the effects of increased temperature during first 36 hours of incubation on embryonic development, hatchability and day-old chick quality. The experiment was conducted using Ross 308 hatching eggs that had been stored for 4 days, broiler breeder&apos;s age was 55 weeks. Totally 1200 hatching eggs were used in 20 repetitions. The temperature in hatching machine at first 36 hours of incubation for control group (CG) was 100.8oF. For experimental group (EG) the temperature at first 36 hours of incubation was 102.5oF. There was no significant difference in fertility between the groups, however the hatchability was higher in CG (P&lt;0.05). Hatchability of fertile eggs was 92.2% in CG and 90.4% in EG. There was not significant difference between CG and EG in early and middle stage embryonic mortality. But mortality in the last third of incubation was significantly higher (P&lt;0.05) in EG. In CG the late mortality was 2.47%, in EG 4.17%. In average day-old chick weight neither yolk sac weight, percentage of yolk sac from the weight nor triiodothyronine (thyroid hormone T3) activity there was not significant difference between the groups. Temperature setting change in hatching machine at first 36 hours of incubation from standard 100.8oF to 102.5oF had negative impact on hatchability.

Název v anglickém jazyce

Effect of increased temperature at the beginning of incubation on day-old chick quality in broilers

Popis výsledku anglicky

The significance of conditions during incubation period for broiler chickens has been recognized to be critical due to the fact that broilers spend up to 40% of their total life inside the egg during incubation. Thus, anything that can optimize posthatch growth and development may have great scientific and practical interest. The present study was therefore conducted to elucidate the effects of increased temperature during first 36 hours of incubation on embryonic development, hatchability and day-old chick quality. The experiment was conducted using Ross 308 hatching eggs that had been stored for 4 days, broiler breeder&apos;s age was 55 weeks. Totally 1200 hatching eggs were used in 20 repetitions. The temperature in hatching machine at first 36 hours of incubation for control group (CG) was 100.8oF. For experimental group (EG) the temperature at first 36 hours of incubation was 102.5oF. There was no significant difference in fertility between the groups, however the hatchability was higher in CG (P&lt;0.05). Hatchability of fertile eggs was 92.2% in CG and 90.4% in EG. There was not significant difference between CG and EG in early and middle stage embryonic mortality. But mortality in the last third of incubation was significantly higher (P&lt;0.05) in EG. In CG the late mortality was 2.47%, in EG 4.17%. In average day-old chick weight neither yolk sac weight, percentage of yolk sac from the weight nor triiodothyronine (thyroid hormone T3) activity there was not significant difference between the groups. Temperature setting change in hatching machine at first 36 hours of incubation from standard 100.8oF to 102.5oF had negative impact on hatchability.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

40201 - Animal and dairy science; (Animal biotechnology to be 4.4)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Animal Breeding 2020

ISBN

978-80-7509-705-7

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

89-96

Název nakladatele

Mendelova univerzita v Brně

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

5. 2. 2020

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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