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  1. Survival analysis and computer simulations of lethal and contraceptive management strategies for urban deer

    Contributor(s):: Grund, M. D.

  2. The long-term impact of infant rearing background on the affective state of adult common marmosets ( Callithrix jacchus)

    Contributor(s):: Ash, H., Buchanan-Smith, H. M.

    Early life environment, including temporary family separation, can have a major influence on affective state. Using a battery of tests, the current study compared the performance of adult common marmosets ( Callithrix jacchus), reared as infants under 3 different conditions: family-reared twins,...

  3. Genetic and environmental influences on individual differences in frequency of play with pets among middle-aged men: a behavioral genetic analysis

    Full-text: Available

    | Contributor(s):: Jacobson, K. C., Hoffman, C. L., Vasilopoulos, T., Kremen, W. S., Panizzon, M. S., Grant, M. D., Lyons, M. J., Xian, H., Franz, C. E.

    There is growing evidence that pet ownership and human–animal interaction (HAI) have benefits for human physical and psychological well-being. However, there may be pre-existing characteristics related to patterns of pet ownership and interactions with pets that could potentially bias...

  4. The truth about cats and dogs: Are there genetic influences on pet ownership

    | Contributor(s):: Spotts, Erica L., Lichtenstein, Paul, Neiderhiser, Jenae M.

  5. Sexual performance of twin ram lambs and the effect of number and sex of contemporary siblings

    | Contributor(s):: Price, E. O., Bench, C. J., Borgwardt, R. E., Dally, M. R.

    The objectives of this investigation were to determine the degree of correspondence in the sexual performance of twin male sheep and to compare the sexual performance of ram lambs born co-twin to another male (M-M), co-twin to a female (M-F) and as single (S) offspring. Individual ram lambs (n =...

  6. Effects of sex, litter size and periconceptional ewe nutrition on the ewe-lamb bond

    | Contributor(s):: Hernandez, C. E., Matthews, L. R., Oliver, M. H., Bloomfield, F. H., Harding, J. E.

    Undernutrition restricted to the time around conception in sheep alters endocrine and metabolic responses in the offspring. Studies in rats suggest that such an early insult can also alter the behaviour of the offspring. We studied the effects of mild maternal periconceptional undernutrition...

  7. My four children

    | Contributor(s):: Panish, Lisa

  8. Separation of ewes from twin lambs: incidence in several sheep breeds

    | Contributor(s):: Alexander, G., Stevens, D., Kilgour, R., Langen, H. de, Mottershead, B. E., Lynch, J. J.

    The ability of ewes and their lambs to keep together during the 1st and 2nd day of life, when the mother-offspring bond is consolidating, was examined in fine-wool Merino, Dorset Horn, Romney and Suffolk X (Border Leicester X Merino) sheep. 45.7% of twin-bearing Merinos became permanently...

  9. Effects of relatedness on the suckling behaviour of calves in a herd of beef cattle rearing twins

    | Contributor(s):: Waltl, B., Appleby, M. C., Solkner, J.

    The behaviour of 10 cows, each with twin calves, was observed during two 10-day periods in early and late summer. Behaviour was recorded using focal-sampling procedures and sucking behaviour was recorded continuously for all calves. Eight of the 10 cows were mothers of twins, consisting of one...

  10. Effect of maternal presence on the development of social relationships among lambs

    | Contributor(s):: Ligout, S., Porter, R. H.

    We assessed the influence of mother ewes (Ovis aries) on the development of their lambs' discriminative social interactions. Experiment 1: twin lambs in one condition were housed with their mother in small groups (M lambs), while twins in a second condition were separated from their dam after...

  11. Parturient behaviour and calf survival in a herd selected for twinning

    | Contributor(s):: Owens, J. L., Edey, T. N., Bindon, B. M., Piper, L. R.

    Over a three-year period dam and calf behaviour was observed in 47 single and 2 twin births from the time of behavioural signs of approaching parturition until first sucking in a herd of mixed Bos taurus beef and dairy breeds on improved pasture at Longford research station. Calf mortality was...

  12. The effects of twinning on mother-offspring behavior in range beef cattle

    | Contributor(s):: Price, E. O., Martinez, C. L., Coe, B. L.

    Eight single and 14 twin calves (Hereford and Hereford x Angus) and their 15 dams were observed in a 24.8-ha enclosure of topographically diverse rangeland between 2 and 20 weeks after parturition. By 15-20 weeks of age twins were sucking for less than a quarter of the time spent at 3-6 weeks,...

  13. The effect of experience on twin-care in New Zealand Romney sheep

    | Contributor(s):: Alexander, G., Kilgour, R., Stevens, D., Bradley, L. R.