Search Results - "Erhard, H.W."

Sexually active groups in cattle-a novel estrus sign by Sveberg, G, Refsdal, A O, Erhard, H W, Kommisrud, E, Aldrin, M, Tvete, I F, Buckley, F, Waldmann, A, Ropstad, E

“…The current study presents a novel objective measure for characterizing sexually active groups (SAG 3-5) and relates this measure to other behaviors of…”
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Lameness detection via leg-mounted accelerometers on dairy cows on four commercial farms by Thorup, V. M., Munksgaard, L., Robert, P.-E., Erhard, H. W., Thomsen, P. T., Friggens, N. C.

“…Lameness in dairy herds is traditionally detected by visual inspection, which is time-consuming and subjective. Compared with healthy cows, lame cows often…”
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Consistency of animal order in spontaneous group movements allows the measurement of leadership in a group of grazing heifers by Dumont, B., Boissy, A., Achard, C., Sibbald, A.M., Erhard, H.W.

“…The term ‘leadership’ has been used in several different senses, resulting in very different ways of identifying leaders and apparently inconsistent…”
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Comparison of Holstein-Friesian and Norwegian Red dairy cattle for estrus length and estrous signs by Sveberg, G, Rogers, G W, Cooper, J, Refsdal, A O, Erhard, H W, Kommisrud, E, Buckley, F, Waldmann, A, Ropstad, E

“…This study addressed the effect of breed on estrus length and estrous behavior by observing 20 Holstein-Friesian (HF) and 20 Norwegian Red (NRF) cows on an…”
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A test for measuring individual variation in how far grazing animals will move away from a social group to feed by Sibbald, A.M., Erhard, H.W., Hooper, R.J., Dumont, B., Boissy, A.

“…This paper describes a test for gregarious grazing animals, which measures trade-offs between feeding and social companionship. Four groups of 10 female…”
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Behavior of lactating Holstein-Friesian cows during spontaneous cycles of estrus by Sveberg, G, Refsdal, A O, Erhard, H W, Kommisrud, E, Aldrin, M, Tvete, I F, Buckley, F, Waldmann, A, Ropstad, E

“…The objectives of the present study were to describe, in detail, behavior associated with standing estrus (STE) in lactating dairy cows and behavioral changes…”
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A method for assessing the relative sociability of individuals within groups: an example with grazing sheep by Sibbald, A.M., Elston, D.A., Smith, D.J.F., Erhard, H.W.

“…We describe a method for quantifying relative sociability within a group of animals, which is defined as the tendency to be close to others within the group…”
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Habituation and extinction in an approach–avoidance test: An example with sheep by Erhard, Hans W., Elston, David A., Davidson, Grant C.

“…During a behavioural test, the test animal's perception of the test situation may change, e.g. as a result of habituation. This change can occur within a test…”
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Ultradian activity rhythms in large groups of newly hatched chicks (Gallus gallus domesticus) by Nielsen, B.L., Erhard, H.W., Friggens, N.C., McLeod, J.E.

“…A clutch of young chicks housed with a mother hen exhibit ultradian (within day) rhythms of activity corresponding to the brooding cycle of the hen. In the…”
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Individual differences in tonic immobility may reflect behavioural strategies by Erhard, Hans W, Mendl, Michael, Christiansen, Stine B

“…Many species of animals have been reported to show tonic immobility (TI) in response to physical restraint. In this paper, we investigate the interrelationship…”
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Individual aggressiveness of pigs can be measured and used to reduce aggression after mixing by Erhard, Hans W., Mendl, Michael, Ashley, Doranne D.

“…Many studies have been carried out with the aim of reducing aggression after mixing unfamiliar pigs. A major problem in these studies has been the individual…”
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Assessing dominance in sheep in a competitive situation: level of motivation and test duration by Erhard, Hans W, Fàbrega, Emma, Stanworth, Glyn, Elston, David A

“…The dominance structure in an established group of sheep is often difficult to determine in the field, because of the low frequency of agonistic interactions,…”
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Tonic immobility and emergence time in pigs—more evidence for behavioural strategies by Erhard, Hans W, Mendl, Michael

“…The aim of this study was to further investigate the link between tonic immobility (TI) in pigs and active/passive behavioural strategies. Twenty-nine female…”
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Measuring aggressiveness in growing pigs in a resident-intruder situation by Erhard, Hans W., Mendl, Michael

“…Studies concerning aggression after mixing unfamiliar pigs have shown that there is a great variability in the levels of aggression shown by individual pigs…”
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The relationship between food consumption and persistence of post-feeding foraging behaviour in sows by Haskell, M.J., Terlouw, E.M.C., Lawrence, A.B., Erhard, H.W.

“…There remains some uncertainty regarding the roles of internal and external factors in the organization of feeding behaviour. In the pig ( Sus scrofa) there…”
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Individual differences and personality by Erhard, H.W, Schouten, W.G.P

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Among-goat variability in feeding behaviour and feed efficiency under diets differing in the percentage of concentrate by Giger-Reverdin, Sylvie, Erhard, Hans W.

“…Feeding behaviour in ruminants differs with individuals and diet composition and might have effects on feed efficiency and provide protection especially…”
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Saanen and Alpine goats experience neophobia when offered novel feeds by Favreau-Peigné, Angélique, Dhumez, Ophélie, Ginane, Cécile, Erhard, Hans W.

“…Feed neophobia is a reluctance to eat a novel feed that can last from minutes to days. While it can prevent animals from ingesting toxins, it may also have…”
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Face-based perception of emotions in dairy goats by Bellegarde, Lucille G.A., Haskell, Marie J., Duvaux-Ponter, Christine, Weiss, Alexander, Boissy, Alain, Erhard, Hans W.

“…•We investigated the potential use of images of faces as cognitive bias stimuli.•Goats react differently to pictures of faces taken in positive and negative…”
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Reactivity to isolation and association with conspecifics: A temperament trait stable across time and situations by Lansade, Léa, Bouissou, Marie-France, Erhard, Hans W.

“…A temperament trait is generally defined as individual differences in behaviour that are present early in life and relatively stable across situations and over…”
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