caa a22 4500 386320764 CHVBK 20180307111625.0 cr unu---uuuuu 161130e198808 xx s 000 0 eng 10.1017/S0003356100037144 doi S0003356100037144 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100037144 Social hierarchy and feeder access in a group of 20 sows using a computer-controlled feeder [Elektronische Daten] Twenty pregnant sows sharing a double-entry back-out Pig Code feeder with a similar group of 20 were observed over six 24-h feed cycles by a combination of direct observation and video recording. The group had access to an area of 47 m2. Sows were fed once a day on a pelleted diet and water was continually available. Feeding order was relatively constant from day to day, and was positively correlated with parity. A social hierarchy based on displacements and attacks within pairs of sows was found to be basically linear, with the exception of six reversals of dominance. Social hierarchy was positively correlated with feeding order overall, but this was not the case for the latter half of the feeding order. This was partly due to disruption of feeder use by non-feeding visits made by early-feeding dominant sows. Overall the results showed that older sows with more experience of the feeder in two or three previous parities were higher in the feeding order and social hierarchy than younger sows, and may exclude them from the feeder by repeated non-feeding visits. Copyright © British Society of Animal Science 1988 Hunter E. J. Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading RG6 2AJ Broom D. M. Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading RG6 2AJ Edwards S. A. MAFF Terrington Experimental Husbandry Farm, Terrington St Clement, Kings Lynn, Norfolk PE34 4PW Sibly R. M. Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading RG6 2AJ Animal Production Cambridge University Press 47/1(1988-08), 139-148 0003-3561 47:1<139 1988 47 ASC https://doi.org/10.1017/S0003356100037144 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100037144 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hunter E. J. Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading RG6 2AJ NATIONALLICENCE 700 1- Broom D. M. Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading RG6 2AJ NATIONALLICENCE 700 1- Edwards S. A. MAFF Terrington Experimental Husbandry Farm, Terrington St Clement, Kings Lynn, Norfolk PE34 4PW NATIONALLICENCE 700 1- Sibly R. M. Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading RG6 2AJ NATIONALLICENCE 773 0- Animal Production Cambridge University Press 47/1(1988-08), 139-148 0003-3561 47:1<139 1988 47 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge