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Author |
Couzin, I.D.; Krause, J.; Franks, N.R.; Levin, S.A. |
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Title |
Effective leadership and decision-making in animal groups on the move |
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Journal Article |
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2005 |
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Nature |
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433 |
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7025 |
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513-516 |
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0028-0836 |
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10.1038/nature03236 |
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Equine Behaviour @ team @ |
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4827 |
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Author |
Hausberger, M.; Richard-Yris, M.-A. |
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Title |
Individual differences in the domestic horse, origins, development and stability |
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Book Chapter |
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2005 |
Publication |
The domestic horse : the origins, development, and management of its behaviour |
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33-52 |
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Cambridge University Press 2005 |
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Cambridge |
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Mills, D.S.; McDonnell, |
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13 978-0-521-81414-6 |
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Equine Behaviour @ team @ Feh2005 |
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4819 |
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Author |
Conradt, L.; Roper, T.J. |
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Title |
Consensus decision making in animals |
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Journal Article |
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Year |
2005 |
Publication |
Trends in Ecology & Evolution (Personal Edition) |
Abbreviated Journal |
Trends Ecol Evol |
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Volume |
20 |
Issue |
8 |
Pages |
449-456 |
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Individual animals routinely face decisions that are crucial to their fitness. In social species, however, many of these decisions need to be made jointly with other group members because the group will split apart unless a consensus is reached. Here, we review empirical and theoretical studies of consensus decision making, and place them in a coherent framework. In particular, we classify consensus decisions according to the degree to which they involve conflict of interest between group members, and whether they involve either local or global communication; we ask, for different categories of consensus decision, who makes the decision, what are the underlying mechanisms, and what are the functional consequences. We conclude that consensus decision making is common in non-human animals, and that cooperation between group members in the decision-making process is likely to be the norm, even when the decision involves significant conflict of interest. |
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Department of Biology and Environmental Science, John Maynard Smith Building, University of Sussex, Brighton, UK, BN1 9QG. L.Conradt@sussex.ac.uk |
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English |
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0169-5347 |
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PMID:16701416 |
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Equine Behaviour @ team @ |
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4802 |
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Landaeta-Hernández, A. J.; Chenoweth, P. J.; Randles, R.; Littell, R.; Rae, O.; Chase, C. C. |
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Title |
Identifying the social dominance order in a mixed breed herd: a practical methodology |
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Journal Article |
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Year |
2005 |
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Revista Científica |
Abbreviated Journal |
Revista Científica |
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Volume |
15 |
Issue |
2 |
Pages |
148-154 |
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Keywords |
Cattle, behavior, social organization |
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The major objective of this study was to identify a simple and accurate method of assessing differences in female social status. Three methods of estimating dominance value (DV) were compared in beef cows of three breed-types; Angus (A; n=10), Brahman (B; n=10), and Senepol (S; n=10). Cows were equitably assigned to two groups of fifteen each, allocated into separate pastures and containing equal number of animals by breed. Agonistic interactions were recorded for 45 d of study, in two 1 h periods during concentrate feeding using the method of competitive orders winner/loser. Methods of estimating DV included: I) Ratio between individuals dominated and total encountered, II) Ratio between encounters won to total encounters, III) Proportion of individuals dominated to total herdmates. Due to the different level of interactivity evidenced among animals as well as between and within social orders, method III with subsequent arc-sin transformation was considered as the most practical and accurate method for estimating DV and subsequent allocation of cows into a social dominance order. In addition, a breed effect was found on social dominance. Senepol cows obtained greater DV`s (1.24 ± 0.08) than Angus (0.97 ± 0.08; P<0.03) and Brahman cows (0.76 ± 0.08; P<0.005). |
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0798-2259 |
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yes |
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Equine Behaviour @ team @ |
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4753 |
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Author |
Mills, D.S.; McDonnell, S. M. (eds) |
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Title |
The Domestic Horse |
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Book Whole |
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Year |
2005 |
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Humans have had a profound influence on the horse since its domestication in the late Neolithic period. Used for transport, labour, food and recreation, horses have become important in many facets of our society. Daniel Mills and Sue McDonnell have produced an exceptional account of our current knowledge of the development and management of the behaviour of the horse, from its wild roots. The Domestic Horse brings together, for the first time, an unrivalled collection of international scientific authors to write on the latest findings concerning the behaviour and welfare of this beautiful animal. Illustrated throughout, The Domestic Horse will appeal to animal scientists, those working with horses in a professional capacity and the owner/enthusiast. It also provides sound complementary reading for animal/equine science courses and veterinary students. |
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Cambridge University Press |
Place of Publication |
Camebridge |
Editor |
Mills, D.S.; McDonnell, S. M. |
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9780521891134 |
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Equine Behaviour @ team @ |
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4750 |
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Author |
Sol, D.; Duncan, R.P.; Blackburn, T.M.; Cassey, P.; Lefebvre, L. |
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Title |
Big brains, enhanced cognition, and response of birds to novel environments |
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Journal Article |
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Year |
2005 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
Abbreviated Journal |
Proc. Natl. Acad. Sci. U.S.A. |
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102 |
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15 |
Pages |
5460-5465 |
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The widely held hypothesis that enlarged brains have evolved as an adaptation to cope with novel or altered environmental conditions lacks firm empirical support. Here, we test this hypothesis for a major animal group (birds) by examining whether large-brained species show higher survival than small-brained species when introduced to nonnative locations. Using a global database documenting the outcome of >600 introduction events, we confirm that avian species with larger brains, relative to their body mass, tend to be more successful at establishing themselves in novel environments. Moreover, we provide evidence that larger brains help birds respond to novel conditions by enhancing their innovation propensity rather than indirectly through noncognitive mechanisms. These findings provide strong evidence for the hypothesis that enlarged brains function, and hence may have evolved, to deal with changes in the environment. |
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10.1073/pnas.0408145102 |
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Equine Behaviour @ team @ |
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4739 |
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Author |
Tizo-Pedroso, E.; Del-Claro, K. |
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Title |
Matriphagy In The Neotropical Pseudoscorpion Paratemnoides Nidificator (Balzan 1888) (Atemnidae) |
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Journal Article |
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Year |
2005 |
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Journal of Arachnology |
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33 |
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3 |
Pages |
873-877 |
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We studied the natural history and social behavior of Paratemnoides nidificator (Balzan 1888) in a tropical savanna system. Females were responsible for all nymphal care. We observed, for the first time in pseudoscorpions, the occurrence of matriphagy behavior by the offspring. During conditions of food deprivation, the mother went out of the nest and passively awaited the protonymphs' attack, not reacting to the capture nor to the nymphs feeding on her body. We suggest that this extreme form of parental care, matriphagy, can reduce cannibalism among protonymphs and facilitate the evolution of social behavior in pseudoscorpions. RESUMO Nos estudamos a historia natural e o comportamento social de Paratemnoides nidificator (Balzan 1888) na regiao dos cerrados. As femeas foram responsaveis por todo o cuidado as ninfas. Nos observamos, pela primeira vez em pseudoescorpioes, a ocorrencia de matrifagia pela prole. Em condicoes de fome, a mae deixa o ninho e passivamente espera que as protoninfas a ataquem, nao reagindo nem a captura, nem a alimentacao das ninfas sobre seu corpo. Nos sugerimos que esta forma extrema de cuidado parental, matrifagia, possa reduzir o canibalismo entre as protoninfas e assim facilitar a evolucao de comportamento social em pseudoescorpioes. |
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Equine Behaviour @ team @ |
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4718 |
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Vidya, T.N.C.; Sukumar, R. |
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Social and reproductive behaviour in elephants |
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Journal Article |
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2005 |
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Current Science (Bangalore) |
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Curr Sci |
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89 |
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7 |
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1200-1207 |
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Acoustic communication; dispersal; Elephas maximus; Loxodonta africana; musth; social organization |
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We present a review of studies on elephant social and reproductive behaviour. While the social organization of the African savannah elephant (Loxodonta africana africana) has been intensively studied,that of the African forest elephant (Loxodonta africana cyclotis) and the Asian elephant (Elephas maximus) are poorly understood. Noninvasive molecular methods are useful in combination with behavioural data in understanding social organization and dispersal strategies. The ecological determinants of social organization, and the importance of matriarchal leadership to social groups, and relative importance of different forms of communication under various ecological conditions remain interesting topics that await investigation. Reproductive behaviour also has been examined in detail only in the African savannah elephant, although rigorous chemical analyses continue to be carried out using captive elephants of both species. Improved laboratory techniques may enable future work on reproductive signalling in free-ranging elephants, allowing for comprehensive studies of male-male interactions and mate choice by females. |
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Copyright for this article belongs to Indian Academy of Sciences. |
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yes |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4703 |
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Author |
Grogan, E.H.; McDonnell, S.M. |
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Title |
Mare and Foal Bonding and Problems |
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Journal Article |
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Year |
2005 |
Publication |
Clinical Techniques in Equine Practice |
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4 |
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3 |
Pages |
228-237 |
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Equine; bonding; behavior; mare; neonatal; foal; inadequate maternal behavior; orphan foal; nurse or foster mare |
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A number of specific behavioral responses have been identified in mares and foals as the presumed behavioral interactive sequences supporting bonding. With the exception of the severely physically compromised foal, most failures of the mare foal bond appear to result from inadequate behavior of the mare. Six distinct forms of maternal behavior problems include ambivalence of the mare toward her foal, fear of the foal, nursing only avoidance of the foal, extreme protectiveness of the foal that becomes problematic in domestic confinement, savage attack (true rejection), and stealing or adoption of an alien foal. Management of maternal behavior problem cases in which the pair cannot be salvaged include foster (or nurse mares) and hand-rearing methods. Also presented are current practical resources related to managing certain types of inadequate maternal behavior and for rearing the orphaned foal. |
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Equine Behaviour @ team @ |
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4671 |
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Author |
Howard, R.W.; Blomquist, G.J. |
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Ecological, behavioral, and biochemical aspects of insect hydrocarbons |
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Journal Article |
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Year |
2005 |
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Annual Review of Entomology |
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Annu Rev Entomol |
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50 |
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371-393 |
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Animals; Behavior, Animal/physiology; Hydrocarbons/*metabolism; Insects/*physiology; Pheromones/*physiology; Reproduction; Species Specificity |
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This review covers selected literature from 1982 to the present on some of the ecological, behavioral, and biochemical aspects of hydrocarbon use by insects and other arthropods. Major ecological and behavioral topics are species- and gender-recognition, nestmate recognition, task-specific cues, dominance and fertility cues, chemical mimicry, and primer pheromones. Major biochemical topics include chain length regulation, mechanism of hydrocarbon formation, timing of hydrocarbon synthesis and transport, and biosynthesis of volatile hydrocarbon pheromones of Lepidoptera and Coleoptera. In addition, a section is devoted to future research needs in this rapidly growing area of science. |
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USDA-ARS, Manhattan, Kansas 66502, USA. howardks@ksu.edu |
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0066-4170 |
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PMID:15355247 |
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Equine Behaviour @ team @ |
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4650 |
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