Effects of Timing and Duration of LED Light Supply during Incubation on Embryonic Development andHatching Parameters of Sasso Eggs | [International Journal of Veterinary Science • 2023]

Author(s):

1. Oluwadamilola Moyin Oso: Regional Centre of Excellence in Poultry Sciences, University of Lomé,01BP1515, Lomé,Togo

2. Kossi Metowogo: Department of Animal Physiology, Faculty of Science, University of Lomé,01BP1515, Lomé,Togo

3. Benjamin Adjei-Mensah: Regional Centre of Excellence in Poultry Sciences, University of Lomé,01BP1515, Lomé,Togo

4. Oyegunle Emmanuel OKE: Department of Animal Physiology, Federal University of Technology,P.M.B 2240, Abeokuta,Nigeria

5. Clement Gbongbon: Regional Centre of Excellence in Poultry Sciences, University of Lomé,01BP1515, Lomé,Togo

6. Okanlawon Mohammed Onagbesan: Department of Animal Physiology, Federal University of Technology,P.M.B 2240, Abeokuta,Nigeria

7. Kokou Tona: Regional Centre of Excellence in Poultry Sciences, University of Lomé,01BP1515, Lomé,Togo

Abstract:

Light has been used as a management tool during incubation, but with varying results. The study was to evaluate the effect of egg exposure to LED light at different phases and for different durations on embryo development, hatching and hematological parameters. Five hundred Sasso broiler eggs were assigned to 4 treatments: eggs incubated in the dark throughout incubation (TA), eggs exposed to light from days 1-21 (TB), days 7-21 (TC) and days 14-21 (TD) of incubation. The eggs were photo-exposed using a 6,500k cool LED at 788 clux intensity. The result shows that TB, TC and TD had decreased (P<0.05) average hatch time, internal piping duration, external piping and hatch duration compared to TA. TA eggs recorded a wider hatch window compared to other treatments and the narrowest was TB, comparable to TC and TD. Hematological parameters were not affected at hatch, but the heterophil/lymphocyte ratio was significantly lower (P<0.05) in all photo-incubation treatments when compared to TA. Hatching events in slowgrowing broiler birds can be accelerated by pre-hatch light stimulation, moreover, photo-incubation from the first day of incubation narrowed the spread of hatch. Photo-incubating eggs from days 1-21 will enhance hatch synchronization.

Page(s): 572-579

DOI: 10.47278/journal.ijvs/2023.003

Published: Journal: International Journal of Veterinary Science, Volume: 12, Issue: 4, Year: 2023

Keywords:

broiler , Light , incubation , Embryo Development , Hatching Event , PhotoIncubation

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