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Author Nitschelm D, H.V.D.C.
Title The influence of chlormadinone acetate treatment on the concentration of some stereoids in the blood, on the ovarian activity, and on the sexual behaviour of the.. Type Journal Article
Year 1977 Publication (up) Abbreviated Journal Tijdschr Diergeneesk
Volume 102 Issue Pages 61-872
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number Serial 1420
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Author Olsen Fw, H.R.
Title Food relations of wild free – roaming horses to livestock and big game, Red Desert, Wyoming Type Journal Article
Year 1977 Publication (up) Abbreviated Journal J Range Mgmt
Volume 30 Issue Pages 17-20
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number Serial 1436
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Author Potter Rl, H.R.
Title Feral burro food habits and habitat relations, Grand Canyon National Park, Arizona Type Journal Article
Year 1979 Publication (up) Abbreviated Journal Symposium on the Ecology and Behavior of wild and feral Equids, Laramie
Volume Issue Pages 143-157
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number Serial 1482
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Author Salter Re, H.J.
Title Habitat utilization by feral horses in western Alberta Type Journal Article
Year 1978 Publication (up) Abbreviated Journal Naturaliste can.
Volume 105 Issue Pages 309-321
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number Serial 1550
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Author Salter Re, H.J.
Title Range relationships of feral horses with wild ungulates and cattle in western Alberta Type Journal Article
Year 1980 Publication (up) Abbreviated Journal J Range Mgmt
Volume 33 Issue Pages 266-271
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number Serial 1552
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Author Schilder, M.B.H.
Title Social behaviour and social arganization of a herd of plains zebra in a safari park Type Manuscript
Year 1990 Publication (up) Abbreviated Journal
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Corporate Author Thesis Ph.D. thesis
Publisher Place of Publication University of Utrecht Editor
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Notes from Professor Hans Klingels Equine Reference List Approved yes
Call Number Serial 1566
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Author Würbel, H.
Title The relationship between social structure and mating system in donkeys & Mating strategies of male donkeys in a promiscuous mating system"l structure and mating system in donkeys & Type Manuscript
Year 1990 Publication (up) Abbreviated Journal
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Corporate Author Thesis Diploma thesis
Publisher Place of Publication Faculty of Natural Sciences, University of Berne, Switzerland Editor
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Notes from Professor Hans Klingels Equine Reference List Approved yes
Call Number Serial 1724
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Author Kroodsma, D. E.; Miller, E. H. (eds)
Title Ecology and evolution of acoustic communication in birds Type Book Whole
Year 1996 Publication (up) Abbreviated Journal
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Publisher Cornell University Press Place of Publication Ithaca Editor Kroodsma, D. E.; Miller, E. H.
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ISSN ISBN 978-0801482212 Medium
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Call Number Equine Behaviour @ team @ Serial 2166
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Author Stahl, J.; Tolsma, P.H.; Loonen, M.J.J.E.; Drent, R.H.
Title Subordinates explore but dominants profit: resource competition in high Arctic barnacle goose flocks Type Journal Article
Year 2001 Publication (up) Abbreviated Journal
Volume 61 Issue 1 Pages 257-264
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Abstract Social dominance plays an important role in assessing and obtaining access to patchy or scarce food sources in group-foraging herbivores. We investigated the foraging strategies of individuals with respect to their social position in the group in a flock of nonbreeding, moulting barnacle geese, Branta leucopsis, on high Arctic Spitsbergen. We first determined the dominance rank of individually marked birds. The dominance of an individual was best described by its age and its sex-specific body mass. Mating status explained the large variation in dominance among younger birds, as unpaired yearlings ranked lowest. In an artificially created, competitive situation, subordinate individuals occupied explorative front positions in the flock and were the first to find sites with experimentally enriched vegetation. Nevertheless, they were displaced quickly from these favourable sites by more dominant geese which were able to monopolize them. The enhanced sites were subsequently visited preferentially by individuals that succeeded in feeding there when the exclosures were first opened. Data on walking speed of foraging individuals and nearest-neighbour distances in the group suggest that subordinates try to compensate for a lower energy intake by exploring and by lengthening the foraging bout. Observations of our focal birds during the following breeding season revealed that females that returned to the study area were significantly more dominant in the previous year than those not seen in the area again.
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Call Number Equine Behaviour @ team @ Serial 2186
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Author Tebbich, S.; Taborsky, M.; Winkler, H.
Title Social manipulation causes cooperation in keas Type Journal Article
Year 1996 Publication (up) Abbreviated Journal
Volume 52 Issue 1 Pages 1-10
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Abstract Abstract. This study assessed whether keas,Nestor notabilis, are able to cooperate in an instrumental task. Seven birds of a captive group were tested in group situations and in dyads. At least two individuals had to manipulate an apparatus to obtain food but only one participant was rewarded. One bird had to push down a lever to enable another one to collect food from a box. The distribution of the two different roles was clearly dependent on hierarchy. The higher ranking individual always obtained the reward and each bird changed its role according to dominance status. Owing to the non-linear hierarchy in the group, each bird participating in cooperative interactions had at least one submissive partner. Therefore, in group situations the reward was distributed symmetrically and cooperation was persistent. In dyadic test situations, three individual keas aggressively manipulated their respective subordinate partners to open the apparatus. Their dominance status enabled them to force cooperation.
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 2189
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