Preference for and behavioural response to environmental enrichment in a small population of sexually mature, commercial boars
Contributor(s):: Sirovica, L. V., Creamer, M., Horback, K. M.
Effect of Birth Weight and Human Socialization on Reproductive Performance of Adult A.I. Boars.
Contributor(s):: Nikhol Elizabeth Dysart
The objective of this study was to examine the effect of birth weight and socialization prior to puberty on reproductive performance of A.I. boars. Twenty boars were randomly allocated to a factorial arrangement of treatments including birth weight (BW: High or Low) and socialization to...
A review of the welfare consequences of surgical castration in piglets and the evaluation of non-surgical methods
Contributor(s):: Prunier, A., Bonneau, M., Borell, E. H. von, Cinotti, S., Gunn, M., Fredriksen, B., Giersing, M., Morton, D. B., Tuyttens, F. A. M., Velarde, A.
Consumer attitudes towards alternatives to piglet castration without pain relief in organic farming: qualitative results from Germany
Contributor(s):: Heid, A., Hamm, U.
The welfare of low-volume farm animals during transport and at slaughter: a review of current knowledge and recommendations for future research
Contributor(s):: Bornett-Gauci, H. L. I., Martin, J. E., Arney, D. R.
The behaviour of male fattening pigs following either surgical castration or vaccination with a GnRF vaccine
Contributor(s):: Baumgartner, J., Laister, S., Koller, M., Pfutzner, A., Grodzycki, M., Andrews, S., Schmoll, F.
Vaccination of male fattening pigs with a gonadotropin releasing factor (GnRF) vaccine is regarded as a possible solution to solve the welfare problem associated with surgical castration, which causes pain and stress even when performed under local or general anaesthesia. The objective of the...
The reproductive behaviour of pigs in a dynamic service system for gilts
Contributor(s):: Grigoriadis, D. F., Edwards, S. A., English, P. R., Davidson, F. M.
The behaviour of 80 gilts and 14 boars was observed over a 54-day period in a dynamic service system with pens of 20 gilts and 4-5 boars. The female population of the system was changed on a regular basis (four animals in, four animals out per week) while boars were resident. Altogether 933...
'Libido' in the larger farm animals: a review
Contributor(s):: Wodzicka-Tomaszewska, M., Kilgour, R., Ryan, M.
The term 'libido', first used by Freud to refer to the force by which the sexual instinct is represented in the mind, has become more and more used to refer to some aspects of sexual behaviour in large domestic animals. From being a wide, rather imprecise term, it has come to be defined in a...
Studies on reproductive behaviour in pigs and sheep
Contributor(s):: Signoret, J. P.
The social environment and the sexual behaviour of the domestic boar
Contributor(s):: Hemsworth, P. H.
The influence of different social and physical environments on the incidence of lactational oestrus in sows
Contributor(s):: Stolba, A., Henderson, R., Wechsler, B.
The behaviour of sows and their litters housed in different environments of increasing social and physical complexity was observed. Lactational oestrus occurred only in the most complex housing system (4 sows grouped, full boar contact, four indoor pens with four connected outside yards). The...
The sexual motivation of boars housed adjacent to ovariectomised gilts did not affect the efficiency of detecting hormonally induced oestrus using the back pressure test
Contributor(s):: Turner, A. I., Hemsworth, P. H., Tilbrook, A. J.
This study tested the hypothesis that the efficiency of detecting oestrus in gilts using the back pressure test will be lower when gilts are housed adjacent to a boar of high sexual motivation than when they are housed adjacent to a boar of low sexual motivation. The experiment was a 2 x 2 Latin...
Surgical castration of pigs affects the behavioural response to a low-dose lipopolysaccharide (LPS) challenge after weaning
Contributor(s):: Moya, S. L., Boyle, L. A., Lynch, P. B., Arkins, S.
The objective of the present study was to evaluate the effect of an acute stressor in the early postnatal life of pigs, surgical castration, on post-weaning behaviour, and on the behavioural, endocrine and immune responses elicited by a low-dose lipopolysaccharide (LPS) challenge after weaning....
The effect of space restriction and provision of toys during rearing on the behaviour, productivity and physiology of male pigs
Contributor(s):: Pearce, G. P., Paterson, A. M.
The effect of space restriction during rearing between 25 and 100 kg liveweight was investigated using a total of 42 Large White/Landrace crossbred male pigs. Pigs were housed in 6 groups of 7 in 3 treatments (uncrowded, crowded and crowded + toys, 14 pigs per treatment) in partially slatted...
Boar presence reduces fighting in mixed slaughter-weight pigs
Contributor(s):: Grandin, T., Bruning, J.
Mixing pigs before slaughter results in skin blemishes and loss of meat quality. 200 pigs each weighing 105 kg were used in 2 trials. They were crosses of Hampshire, Duroc and Yorkshire which had been fed to slaughter weight on ad libitum concentrate rations. Groups of 50 head of barrows and...
Effects of artificial boar stimuli on the expression of oestrus in sows
Contributor(s):: Gerritsen, R., Langendijk, P., Soede, N., Kemp, B.
In this study, the effects of artificial boar stimuli on oestrus expression in sows were compared to that of a boar. During consecutive cycles, 12 gilts and 38 sows were subjected to one of the three treatments. A Back-Pressure-Test (BPT) was carried out twice daily in the presence of a robot...
Feeding pigs: divergence of behavioural and physiological requirements
Contributor(s):: Lawrence, A. B., Appleby, M. C., Macleod, H. A.
In experiments in which hunger in Large WhitexLandrace boars was measured by conditioning them to press a panel to receive 7-g rewards of food, it was concluded that restricting pigs to low food allowances results in a high level of hunger throughout the day. It is suggested that commercial food...
The effects of two oestrus detection procedures and intense boar stimulation near the time of oestrus on mating efficiency of the female pig
Contributor(s):: Hemsworth, P. H., Cronin, G. M., Hansen, C., Winfield, C. G.
In the 1st of 2 experiments, 32 crossbred gilts, aged 12-14 months and which had exhibited >=6 regular oestrous cycles, were checked each morning for oestrus in the corridor adjacent to boar pens (group 1) or in their own pens, which were separated from the boars pens by a 1.0-m wide corridor...
The efficiency of boars to detect oestrous females housed adjacent to boars
Contributor(s):: Hemsworth, P. H., Winfield, C. G., Barnett, J. L., Hansen, C., Schirmer, B., Foote, M.
42 postpubertal gilts were observed for a 21-day period under each of 3 treatments. In treatments 1 and 2, gilts were housed adjacent to a mature boar; treatments were identical except that a different boar was used in each treatment to detect gilts in oestrus. Gilts in treatment 3 were housed...
The influence of conditions at the time of mating on the sexual behaviour of male and female pigs
Contributor(s):: Jongman, E. C., Hemsworth, P. H., Galloway, D. B.
The sexual behaviour of 6-month-old boars and gilts mating in the boar's accommodation pen was compared with that of boars and gilts mating in a mating system called the Detection Mating Area (DMA), in which the boars are housed in individual stalls around a large central arena which is used for...