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  1. Cattle use visual cues to track food locations

    Contributor(s):: Howery, L. D., Bailey, D. W., Ruyle, G. B., Renken, W. J.

    This study tested the hypothesis that cattle aided by visual cues would be more efficient than uncued animals in locating and consuming foods placed in either fixed or variable locations within a 0.64-ha experimental pasture. Eight yearling steers were randomly selected and trained to associate...

  2. Conditioned aversion in sheep induced by Baccharis coridifolia

    Contributor(s):: Almeida, M. B. de, Schild, A. L., Brasil, N. D. A., Quevedo, P. de S., Fiss, L., Pfister, J. A., Riet-Correa, F.

    In Southern Brazil, Uruguay, Argentina, and Paraguay, the invasive weed Baccharis coridifolia often poisons naive animals. Farmers prevent B. coridifolia poisoning using several unconventional methods to reduce ingestion: (1) burning plant material under an animals' nose, and having the animal...

  3. Does sward height affect feeding patch choice and voluntary intake in horses?

    Contributor(s):: Edouard, N., Fleurance, G., Dumont, B., Baumont, R., Duncan, P.

    The numbers of horses grazing at pasture are increasing in developed countries, so a proper understanding of their feeding selectivity and of the tactics they use for extracting nutrients from swards is essential for the management of horses and grasslands. Resource acquisition in herbivores can...

  4. Effects of mixed-species stocking and space allowance on the behaviour and growth of red deer hinds and ewes at pasture

    Contributor(s):: Blanc, F., Theriez, M., Brelurut, A.

    A study was conducted to test whether the effects of space allowance on social interactions, activity patterns and growth rates of hinds reared at pasture in single-species groups, were modified by mixing them with ewes. 30 red deer hinds (10 months old) from the same breeding group and 30 ewes...

  5. Effects of social learning on foraging behaviour and live weight gain in first-season grazing calves

    Contributor(s):: Hessle, A. K.

    When livestock are turned out to semi-natural grasslands, an effective onset of grazing is important both for animal productivity and for defoliation of the sward, which preserve the biodiversity of the vegetation. The aim of this study was to investigate whether foraging behaviour of naive...

  6. Foraging behaviour of growing pigs on grassland in relation to stocking rate and feed crude protein level

    Contributor(s):: Andresen, N., Redbo, I.

    The foraging behaviour of pigs was studied with the aim of using this as a resource in a cropping system. Twenty Landrace x Yorkshire x Hampshire growing pigs, divided into 4 groups, were observed for 3 weeks during the summer of 1995 at Ekhaga Research Farm, east of Uppsala. The pigs had an...

  7. How do grazing heifers choose between maturing reproductive and tall or short vegetative swards?

    Contributor(s):: Ginane, C., Petit, M., D'Hour, P.

    We offered heifers the choice between a tall abundant reproductive sward (RS), evolving from ear emergence to full flowering in the course of the experiment, and a short (8-cm high, treatment S) or tall (14-cm high, treatment T) vegetative sward (VS). This aimed to create a trade-off between...

  8. Influence of floor type in the walking area of cubicle housing systems on the behaviour of dairy cows

    Contributor(s):: Haufe, H. C., Gygax, L., Steiner, B., Friedli, K., Stauffacher, M., Wechsler, B.

    The objective of this study was to compare the behaviour of dairy cows in cubicle housing systems with different floor types (mastic asphalt, slatted concrete floor and rubber floor) in the walking area. From a total number of 18 farms, 6 farms each were equipped with one of the given floor...

  9. Instantaneous intake rate in horses of different body sizes: influence of sward biomass and fibrousness

    Contributor(s):: Fleurance, G., Fritz, H., Duncan, P., Gordon, I. J., Edouard, N., Vial, C.

    The functional response, that is the relationship between the food intake rate of a forager and the availability of food items, has been subject to numerous investigations in ruminants. In horses however, the functional response has been poorly studied despite of the importance of grazed forage...

  10. Intake and selection for white clover by grazing lambs in response to gastrointestinal parasitism

    Contributor(s):: Cosgrove, G. P., Niezen, J. H.

    A study was conducted at Palmerston North, New Zealand to determine if lambs grazing at pasture would enhance their nutrient intake in response to parasitism, by selecting more white clover from a mixed grass-clover pasture. The trial used a split-plot design with two grass-clover mixtures as...

  11. Interactions between social and feeding motivations on the grazing behaviour of herbivores: sheep more easily split into subgroups with familiar peers

    Contributor(s):: Boissy, A., Dumont, B.

    Social grouping tendencies are known to influence the grazing behaviour of domestic herbivores. Here, we investigate how the strength of social bonds in a flock influences the choice of grazing location in sheep. Eight experimental ewes of INRA 401 breed grazed in plots in which a preferred...

  12. Landscape nutritional patterns and cattle distribution in rangeland pastures

    Contributor(s):: Ganskopp, D. C., Bohnert, D. W.

    On rangelands, uneven or unmanaged livestock distribution can adversely affect plant community composition, riparian function, or displace wildlife. These issues have historic precedents and are still a challenge for those managing rangelands. A thorough understanding of the mechanisms governing...

  13. Least-effort pathways: a GIS analysis of livestock trails in rugged terrain

    Contributor(s):: Ganskopp, D., Cruz, R., Johnson, D. E.

    Cattle trails were mapped in three 800+ ha pastures with global positioning units. A geographic information system (GIS) helped quantify characteristics of trails and the landscape and was used to plot least-effort pathways between water sources and distant points on selected trails in the...

  14. Oral/nasal/facial and other behaviors of sows kept individually outdoors on pasture, soil or indoors in gestation crates

    Contributor(s):: Dailey, J. W., McGlone, J. J.

    PIC Camborough-15 sows were housed either on pasture (n=8), on soil (n=8) or in gestation crates (n=16). All were fed 2.0 kg of fortified sorghum-soybean diet each day in pellet form, except half of the crated sows which were fed meal. The occurrences of standing, lying, sitting, feeding,...

  15. Relationships among variables indexing selective grazing behavior of goats

    Contributor(s):: Ganskopp, D., Cruz, R., Fajemisin, B.

    Although portable computers presently allow documentation of real-time grazing behaviour under field conditions, the task of selecting proper and easily recorded variables to test their hypotheses still exists. In view of this, the relationships among variables describing grazing behaviour and...

  16. Seasonal foraging behavioural compensation in reproductive wapiti hinds ( Cervus elaphus canadensis )

    Contributor(s):: Gedir, J. V., Hudson, R. J.

    Captive wapiti hinds were observed during seven periods between June 1996 and November 1997. We investigated their activity and foraging behaviour on two pastures, heavily and lightly grazed, during four phases of the reproductive cycle (early gestation, late gestation, peak lactation, and late...

  17. Selective differences between naive and experienced cattle foraging among eight grasses

    Contributor(s):: Ganskopp, D., Cruz, R.

    The study examined how rapidly naive cattle express clearly defined preferences when they encounter a new array of forages, and compared their evolving forage preferences and grazing behaviour with those of experienced cattle. Three naive and three experienced yearling-steers were grazed in...

  18. Social hierarchy in the domestic goat: effect on food habits and production

    Contributor(s):: Barroso, F. G., Alados, C. L., Boza, J.

    The main objective of this paper is to determine if there is a stable hierarchy of dominance in a flock of goats fed in pasture, and if this hierarchy influences somehow the diet selected in the pasture and in its production of milk and meat. The study was carried out in a flock of goats (n=90)...

  19. Strategies for the avoidance of faeces by grazing sheep

    Contributor(s):: Cooper, J., Gordon, I. J., Pike, A. W.

    Experiments were conducted to investigate which environmental cues were used by sheep when discriminating against patches of pasture contaminated with faeces. The influence of the spatial distribution of contaminated patches and the parasite infection status of sheep on avoidance of contaminated...

  20. The benefits of high rank in the wintertime - a study of the Icelandic horse

    Contributor(s):: Ingolfsdottir, H. B., Sigurjonsdottir, H.

    Behaviour and location of individuals in five groups (N=10; 19; 23; 28; and 30) of Icelandic horses kept in large pastures was documented to see if rank position influenced access to hay and shelter in the wintertime. Rank orders were significantly linear in all groups and correlated with both...