title: Effect of feeding time on the reproductive performance of Japanese quail (Coturnix coturnix japonica).
abstract: Several feeding regimens are applied to improve performance of fertile egg production during times of heat stress. During a period of heat stress (34 to 36 degrees C), two feeding periods were used to measure the impact of feeding time on reproductive performance of Japanese quail (Coturnix cotunix japonica) between 44 and 60 wk of age. Each feeding time treatment had 25 individually caged male and female pairs. Quail were fed ad libitum between 0600 to 1400 or 1400 to 2200 h daily. Results indicated that feeding between 0600 to 1400 h reduced BW, fertility, hatchability, egg production, and egg specific gravity when compared with the effects of feeding between 1400 to 2200 h. Feeding time had no effect on total embryonic mortality, egg weight, or the period between subsequent ovipositions. The different feeding times affected the distribution curve of oviposition over time. An instrument designed to record oviposition time is described. Results showed that selection of the time of day for application of an 8-h restricted feeding regimen affected BW, fertility, hatchability, egg production, egg specific gravity, and oviposition time in Japanese quail.
authors.affiliation: Department of Animal Production, Suez Canal University, Ismailia, Egypt.
authors.forename: S M
authors.initials: SM
authors.lastname: Hassan
authors.forename: M E
authors.initials: ME
authors.lastname: Mady
authors.forename: A L
authors.initials: AL
authors.lastname: Cartwright
authors.forename: H M
authors.initials: HM
authors.lastname: Sabri
authors.forename: M S
authors.initials: MS
authors.lastname: Mobarak
mesh_terms: D000818:Animals; D001835:Body Weight; D002940:Circadian Rhythm; D003370:Coturnix / Q000502:physiology*; D004435:Eating; D004531:Eggs; D005260:Female; D005298:Fertility; D006358:Hot Temperature; D006801:Humans; D008297:Male; D010058:Oviposition; D012098:Reproduction / Q000502:physiology*; D013312:Stress, Physiological; D013997:Time Factors