The intake pattern and feed preference of layer hens selected for high or low feed conversion ratio
Autoři:
Cameron E. F. Clark aff001; Yeasmin Akter aff002; Alena Hungerford aff001; Peter Thomson aff001; Mohammed R. Islam aff001; Peter J. Groves aff002; Cormac J. O’Shea aff003
Působiště autorů:
School of Life and Environmental Sciences, The University of Sydney, Camden, NSW, Australia
aff001; Poultry Research Foundation, Sydney School of Veterinary Science, The University of Sydney, Camden, NSW, Australia
aff002; School of Biosciences, University of Nottingham, Loughborough, England, United Kingdom
aff003
Vyšlo v časopise:
PLoS ONE 14(9)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0222304
Souhrn
Feed accounts for the greatest proportion of egg production costs and there is substantial variation in feed to egg conversion ratio (FCR) efficiency between individual hens. Despite this understanding, there is a paucity of information regarding layer hen feeding behaviour, diet selection and its impact on feed efficiency. It was hypothesised that variation in feed to egg conversion efficiency between hens may be influenced by feeding behaviour. For this experiment, two 35-bird groups of ISA Brown layers were selected from 450 individually caged hens at 25–30 weeks of age for either low FCR < 1.8 ± 0.02 (high feed efficiency (HFE) or high FCR > 2.1 ± 0.02 (low feed efficiency (LFE)). For each of these 70 hens, intake of an ad-libitum mash diet at 2-minute time intervals, 24 h a day, for 7 days was determined alongside behavioural assessment and estimation of the selection of components of the mash. The group selected for HFE had a lower feed intake, similar egg mass and associated lower FCR when compared with the LFE group. Whilst feed intake patterns were similar between HFE and LFE hens, there was a distinct intake pattern for all layer hens with intake rate increasing from 0300 to 1700 h with a sharp decline to 2200 h. High feed efficiency hens selected a diet with 25% more ash and 4% less gross energy than LFE hens. The LFE hens also spent more time eating with more walking events, but less time spent resting, drinking, preening and cage pecking events as compared with HFE hens. In summary, there was no contrasting diurnal pattern of feed consumption behaviour between the groups ranked on feed efficiency, however high feed efficiency hens consumed less feed and selected a diet with greater ash content and lower gross energy as compared with LFE hens. Our work is now focused on individual hen diet selection from mash diets with an aim of formulating precision, targeted diets for greater feed efficiency.
Klíčová slova:
Biology and life sciences – Organisms – Eukaryota – Animals – Vertebrates – Amniotes – Birds – Nutrition – Diet – Nutrients – Physiology – Reproductive physiology – Oviposition – Psychology – Behavior – Animal behavior – Zoology – Agriculture – Crop science – Crops – Soybean – Medicine and health sciences – Social sciences – Physical sciences – Chemistry – Chemical compounds – Phosphates – Research and analysis methods – Chemical characterization – Calorimetry
Zdroje
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