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  1. Nest sharing under semi-natural conditions in laying hens

    Contributor(s):: Riber, Anja Brinch

    Under natural conditions, the feral hen (Gallus gallus domesticus) will choose a nest location away from the flock, whereas under commercial conditions, the domestic hen will often choose the same nest as other hens have used or are still using. Simultaneous nest sharing causes several welfare...

  2. Influence of egg oiling on colony presence of ring-billed gulls

    Contributor(s):: DeVault, Travis L., Schmidt, Paige M., Pogmore, Fred E., Gobeille, John, Belant, Jerrold L., Seamans, Thomas W.

  3. Generational habituation and current bald eagle populations

    Contributor(s):: Guinn, Jeremy E.

  4. Improved methods for deterring cliff swallow nesting on highway structures

    Contributor(s):: Delwiche, M. J., Coates, R. W., Gorenzel, W. P., Salmon, T. P.

  5. Mate choice, maternal investment and implications for ostrich welfare in a farming environment

    Contributor(s):: Bonato, M., Cherry, M. I., Cloete, S. W. P.

    At present, the ostrich industry is inefficient, on account of being characterised by inadequate egg production, high embryo mortality, poor chick survival and suboptimal growth rates. However, as ostrich farming commenced only in the mid 19th century in South Africa, farmed ostriches have had a...

  6. Bringing the Endangered Barn Owl Back to McLean County, Illinois: Implementing a Local Nest Box Program

    Contributor(s):: Anna Groves

    Barn owls are an endangered species in Illinois, but populations have been known to increase where nest box programs have been implemented. In conjunction with the John Wesley Powell Audubon Society, a barn owl nest box program was established in McLean County and the surrounding area. Seventeen...

  7. Effects of grackle damage control techniques in citrus on nesting success of non-target species

    Contributor(s):: John H. Rappole, Wan R. Tipton, Arlo H. Kane, Rafael H. Flores

    Several techniques were tested to reduce the damage caused by great-tailed grackles to citrus in the lower Rio Grande Valley of southern Texas: monofilament line, eyespot balloons, pyrotechnics, and grackle nest removal. Ten species were found nesting in the treated groves, but only the mourning...

  8. Metal concentrations in blood from an adult bald eagle nesting at Clinton Reservoir in Kansas

    Contributor(s):: George T. Allen

    Concentrations of metals in blood from an adult male bald eagle nesting at Clinton Reservoir in eastern Kansas in 1991 were analyzed by induction coupled plasma emission spectroscopy without preconcentration.Because there are very limited data on background levels of most metals in bald eagle...

  9. A model to predict the likelihood of cliff swallow nesting on highway structures in northern California

    Contributor(s):: Coates, R. W., Delwiche, M. J., Gorenzel, W. P., Salmon, T. P.

  10. The effect of group size and stocking density on the welfare and performance of hens housed in furnished cages during summer

    Contributor(s):: Guo, Y. Y., Song, Z. G., Jiao, H. C., Song, Q. Q., Lin, H.

  11. Determinants of reproductive success in force-re-paired cockatiels ( Nymphicus hollandicus )

    Contributor(s):: Stone, E. G., Millam, J. R., El-Halawani, M. E., Phillips, R. E., Redig, P. T.

    58 previously paired cockatiels were re-paired with mates with which they had never been previously paired. Males (M) and females (F) were assigned a breeding history that was 'experienced' (E) or 'inexperienced' (I), depending on whether they were part of a pair that had hatched at least one egg...

  12. Development with age of nest box use and gregarious nesting in laying hens

    Contributor(s):: Riber, A. B.

    Use of nest boxes is an important part of the behavioural repertoire of laying hens kept under commercial conditions. A special form of nest box use is gregarious nesting, which occurs when a hen given the choice between an occupied and an unoccupied nest site chooses the occupied nest site....

  13. The impact of social factors on nesting in laying hens ( Gallus gallus domesticus )

    Contributor(s):: Lundberg, A., Keeling, L. J.

    The effects of competition and disturbances on nest-site selection were studied in commercial laying hens. Hens were housed in 16-litter floor pens (15, 30, 60 and 120 hens per group x 4 replicates) and the levels of aggression and disturbances were compared between nest boxes and pen corners....

  14. Thwarting of behaviour in different contexts and the gakel-call in the laying hen

    Contributor(s):: Zimmerman, P. H., Koene, P., Hooff, J. A. R. A. M. van

    Earlier studies have shown that thwarting of feeding behaviour in the laying hen is expressed through a specific vocalization, the gakel-call. The first aim of this study was to investigate whether the effect of deprivation per se on the occurrence of gakel-calls can be distinguished from the...

  15. The effect of early colour preference and of a colour exposing procedure on the choice of nest colours in laying hens

    Contributor(s):: Huber-Eicher, B.

    It has been observed that hens at the start of lay show a strong preference for a limited number of nests, i.e. those at the corners and at the ends of rows. This leads to overcrowded nests and, as a consequence, to more aggression and an increase in cracked and mislaid eggs. This study aims to...

  16. Floor laying by domestic hens [abstract]

    Contributor(s):: Appleby, M. C., McRae, H. E.

    The problem of floor-laying was investigated by a survey of hen behaviour in a commercial deep-litter system with 4000 broiler breeders. Two hundred females were tagged individually, and regular observations made over 3 months. Birds were apparently consistent in whether they laid in nests or on...

  17. Egg-laying behaviour and nest-site selection of domestic hens kept in small floor-pens

    Contributor(s):: Rietveld-Piepers, B., Blokhuis, H. J., Wiepkema, P. R.

    The development of egg-laying behaviour and nest-site choice is described in 7 flocks of White Leghorn hens housed in small floor-pens. Special interest was directed towards social dominance and the effect of the presence of a cock on the hen's nest-site choice. In the weeks before the hens came...

  18. Identification of key nest site stimuli for Japanese quail ( Coturnix japonica )

    Contributor(s):: Schmid, I., Wechsler, B.

    Groups of Japanese quail hens were housed in pens (2 x 1 x 0.5 m) with litter and access to a sand-filled dust bath and 4 nest boxes for 2 periods of 15 days. The type of nest boxes varied between the pens and the incidence of eggs laid outside the nest boxes was recorded. In experiment 1 (8...

  19. Influence of nest seclusion and nesting material on pre-laying behaviour of laying hens

    | Contributor(s):: Struelens, E., Nuffel, A. van, Tuyttens, F. A. M., Audoorn, L., Vranken, E., Zoons, J., Berckmans, D., Odberg, F., Dongen, S. van, Sonck, B.

    Provision of nest sites is beneficial for the welfare of laying hens in intensive production systems. The design of these nest sites has a direct effect on pre-laying behaviour. The aim of this study was to investigate the effects of screening off the entrances of the nest boxes with...

  20. The influence of light intensity during early exposure to colours on the choice of nest colours by laying hens

    | Contributor(s):: Zupan, M., Kruschwitz, A., Huber-Eicher, B.

    When alternative husbandry systems to battery cages are used, a problem may arise whereby eggs are not laid in the nests provided. This leads not only to economic loss, but may also promote the outbreak of cannibalism. However, the choosing of a nest involves complex behavioural patterns and may...