Influence of egg storage length and orientation on hatching traits and spread of hatch in Transylvanian naked neck chickens.

Autor: Abioja MO; Department of Animal Physiology, College of Animal Science and Livestock Production, Abeokuta, Nigeria., Ojoawo HT; Livestock Science and Sustainable Environment, Centre of Excellence in Agricultural Development and Sustainable Environment, Federal University of Agriculture, Abeokuta, Nigeria., Akinjute OF; Department of Animal Physiology, College of Animal Science and Livestock Production, Abeokuta, Nigeria., Logunleko MO; Department of Animal Physiology, College of Animal Science and Livestock Production, Abeokuta, Nigeria.
Jazyk: angličtina
Zdroj: Journal of animal physiology and animal nutrition [J Anim Physiol Anim Nutr (Berl)] 2023 Jul; Vol. 107 (4), pp. 1083-1092. Date of Electronic Publication: 2022 Nov 10.
DOI: 10.1111/jpn.13786
Abstrakt: Effects of egg storage length and orientation on hatching traits and spread of hatch were determined in Transylvanian naked neck chickens. Eggs (n = 640) stored in a cold room (16 ± 1.5°C, 75 ± 1.5% RH) in batches of 160 eggs each, for 1, 3, 5 or 7 days were used. Half of each batch was stored with a broad end up (BEU) and the other in a narrow end up (NEU). Eggs were incubated in a two-stage incubator (37.5°C, 64% RH). Storage length caused a significant increase in egg weight loss (EWL; p < 0.001). Egg fertility (FERT) was significantly lower in 7 days than in 1, 3 and 5 days stored eggs (p < 0001). Dead in shell (DIS) was lower (p < 0.001) in 1-day storage than in other lengths (p < 0.001). Hatchability of total (HSE) and fertile eggs (HFE) decreased (p > 0.001) gradually from 1 to 7 days, though 3 and 5 days were found to be similar. Hatching commenced earlier (p = 0.055) in 5 days than 1-day storage. Incubation time at 100% hatch, hatch window and spread of hatch were not (p > 0.05) affected by storage length. At the end of the hatch, longer storage than 1 day caused 45, 45 and 15 min/day delay in hatching for 3, 5 and 7 days storage respectively. The chicks from 3 days storage (17.3 cm) were longer (p = 0.05) than those from 5 (17.1 cm) and 7 days groups (17.1 cm). Higher DIG and DIS but lower HSE and HFE (p < 0.05) were recorded in BEU than in NEU orientation. Earlier commencement of hatch (CH) was recorded in BEU than in NEU eggs. There were significant (p < 0.05) interactions between storage length and orientation in FERT, DIG, HSE, HFE, CH and hatch windows. To achieve HFE up to 70%, eggs could be stored for up to 7 days in NUE orientation but should not exceed 3 days in BEU orientation.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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