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Animal Science Database

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Abstract

For captive animals, group sizes and/or densities are established by humans based on criteria that range from enclosure size to experimental needs or economic reasons. Because group sizes in farm, zoo and laboratory animals are the result of human decisions, it is important to highlight the...

Author(s)
Estevez, I.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Applied Animal Behaviour Science, 2007, 103, 3/4, pp 185-283
Abstract

Farm animals are social species with a strong tendency to form groups. Living in groups has associated costs and benefits. The costs refer mostly to competition for food, or access to other valuable resources that may lower the individuals' fitness, while the benefits includes (but are not limited...

Author(s)
Estevez, I.; Andersen, I. L.; Nævdal, E.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Applied Animal Behaviour Science, 2007, 103, 3/4, pp 185-204
Abstract

The aim of this review is to discuss the impact of group size on damaging behaviours, aggression, fear and stress in farm animals and to identify housing- and management options that can help to reduce problems caused by suboptimal group sizes. Increasing group size was found to increase the risk...

Author(s)
Rodenburg, T. B.; Koene, P.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Applied Animal Behaviour Science, 2007, 103, 3/4, pp 205-214
Abstract

In modern rearing systems, turkey producers often face economic losses due to increased aggression, feather pecking, cannibalism, leg disorders, or injuries among birds, which are also significant welfare issues. The main underlying causes appear to relate to rapid growth, flock size, density, poor ...

Author(s)
Marchewka, J.; Watanabe, T. T. N.; Ferrante, V.; Estevez, I.
Publisher
Poultry Science Association, Savoy, USA
Citation
Poultry Science, 2013, 92, 6, pp 1467-1473
Abstract

We hypothesized that whereas domestic fowl in small groups establish a dominance hierarchy through aggressive interactions those in large groups adopt a low-aggression (tolerant) social strategy. To test this hypothesis, we examined the effect of group size on the ontogeny of aggressive behaviour...

Author(s)
Estevez, I.; Keeling, L. J.; Newberry, R. C.
Publisher
Elsevier Science B.V., Amsterdam, Netherlands
Citation
Applied Animal Behaviour Science, 2003, 84, 3, pp 213-218