Effect of early feed withdrawal on subsequent laying hen performance. 1993

K W Koelkebeck, and C M Parsons, and R W Leeper
Department of Animal Sciences, University of Illinois at Urbana-Champaign 61801.

Two experiments evaluated the effects of short periods of feed withdrawal early in production on subsequent performance of laying hens. Laying hens of the H&N strain (22 or 20 wk of age) were full fed (control) or deprived of feed for 4 or 7 days when they reached 10% production. Egg production was evaluated for 45 wk, but other performance data were collected for 32 wk because no treatment differences existed beyond that point. Feed withdrawal for 4 and 7 days caused BW losses of 14 and 20%, respectively. In Experiment 1 (winter), BW at 2-wk postwithdrawal for hens that did not eat for 7 days were reduced (P < or = .05) compared with controls or hens that did not eat for 4 days. However, in Experiment 2 (summer), BW of hens deprived of feed for 4 or 7 days were lower (P < or = .05) than those of controls. Average early egg weight (Weeks 1 to 6) was not different among treatments in both experiments. The only observed effect of treatment on long-term egg weight was that egg weight for 7-day hens was greater (P < or = .05) than for controls in Experiment 2. Early hen-day egg production was depressed by 4- or 7-day feed withdrawal, but long-term production was not different between control and 4-day hens in both experiments. However, hen-housed production was lower (P < or = .05) for 4-day hens compared with controls in Experiment 2. Fewer (P < or = .05) eggs were produced by 7-day hens versus controls in both experiments.(ABSTRACT TRUNCATED AT 250 WORDS)

UI MeSH Term Description Entries
D010058 Oviposition The process of laying or shedding fully developed eggs (OVA) from the female body. The term is usually used for certain INSECTS or FISHES with an organ called ovipositor where eggs are stored or deposited before expulsion from the body. Larviposition,Larvipositions,Ovipositions
D001835 Body Weight The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms. Body Weights,Weight, Body,Weights, Body
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D004531 Eggs Animal reproductive bodies, or the contents thereof, used as food. The concept is differentiated from OVUM, the anatomic or physiologic entity.
D005260 Female Females
D005508 Food Deprivation The withholding of food in a structured experimental situation. Deprivation, Food,Deprivations, Food,Food Deprivations
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000821 Animal Feed Foodstuff used especially for domestic and laboratory animals, or livestock. Fodder,Animal Feeds,Feed, Animal,Feeds, Animal,Fodders
D012621 Seasons Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Seasonal Variation,Season,Seasonal Variations,Variation, Seasonal,Variations, Seasonal
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor

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