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Author |
Wagner, G. |
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Title |
[Flight leadership in flocks of homing pigeons] |
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Journal Article |
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Year |
1975 |
Publication |
Zeitschrift für Tierpsychologie |
Abbreviated Journal |
Z. Tierpsychol. |
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39 |
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61-74 |
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Keywords |
Animals; *Columbidae; *Flight, Animal; *Orientation |
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Groups of 3-5 homing pigeons individually recognizable by different colours of their plumage were followed by helicopter on their way home. In most cases the animals flew together as a group with frequently changing leadership. Flight formations in terms of leadership were noted every minute. It was examined statistically whether the flight order varies at random or whether there are leading and led birds. In 6 out of 7 experiments with groups of 4-5 pigeons flight order was far from random, one or two pigeons proving to be leaders. In only one experiment leadership did not differ from a random distribution. No correlation could be found between the tendency to lead within a group and homing performance of the single pigeon when released individually. |
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German |
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Zur Frage des Flugfuhrens in heimkehrenden Brieftaubengruppen |
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0044-3573 |
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PMID:1231423 |
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2050 |
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Author |
Syme, G.J.; Syme, L.A. |
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Title |
The concept of spatial leadership in farm animals: An experiment with sheep |
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Journal Article |
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Year |
1975 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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23 |
Issue |
Part 4 |
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921-925 |
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The concept of spatial leadership as applied to farm animals is discussed with particular emphasis on methodological problems. Using three experimental procedures forced spatial leadership orders were measured in a group of Romney ewes. Comparisons between orders showed the effects of both the different experimental tasks and the social context on leadership structure. Both these variables were found to affect the orders obtained. The results are interpreted in terms of the utility of the concept of spatial leadership in domestic animals and the necessity for more systematic procedural investigations in this area. |
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2039 |
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Author |
Feist, J.D.; McCullough, D.R. |
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Title |
Reproduction in feral horses |
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Journal Article |
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Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
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23 |
Pages |
13-18 |
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Keywords |
Age Factors; Animals; Female; Horses/*physiology; Leadership; Male; Maternal Behavior; Population; Reproduction; *Sexual Behavior, Animal; Social Dominance; Sucking Behavior |
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A behavioural study of feral horses was conducted on the Pryor Mountain Wild Horse Range in the western United States. All 270 horses on the Range were identified individually. The sex ratio was nearly balanced. Foal to adult female ratio was 43-2:100. Morality was concentrated among foals and old horses. Horses were organized as forty-four harem groups each with a dominant stallion, one to two immature stallions, one to three immature mares, one to three adult mares and their yearling and foal offspring, and 23 bachelor groups of one to eight stallions. Harem groups were quite stable year-round because of dominance and leadership by the stallions and group fidelity by mares and their offsring. Most changes occurred during the breeding season and involved immature females. Defeat of dominant stallions was infrequent. Immature males were tolerated because of their submissive behaviour. Bachelor stallion groups were inherently unstable. Mares came into heat after foaling in May/June, and were mated by harem stallions only. |
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0449-3087 |
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PMID:1060766 |
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refbase @ user @ |
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1964 |
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Author |
Western D, |
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Title |
Water availability and its influence on the structure and dynamics of a savannah large mammal community |
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Journal Article |
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Year |
1975 |
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E Afr Wildl J 1 |
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3 |
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265-288 |
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from Professor Hans Klingels Equine Reference List |
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1704 |
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Author |
Welsh Da, |
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Population, behavioural, and grazing ecology of the Sable Island, Nova Scotia. |
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1975 |
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Ph.D. thesis |
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Dalhousie University |
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Halifax |
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from Professor Hans Klingels Equine Reference List |
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no |
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1702 |
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Author |
Smuts Gl, |
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Title |
Pre – and postnatal growth phenomena of Burchell's Zebra, Equus Burchelli Antiquorum |
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Journal Article |
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Year |
1975 |
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Koedoe |
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18 |
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69-102 |
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from Professor Hans Klingels Equine Reference List |
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1613 |
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Smuts Gl, |
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Title |
Home range sizes for Burchell's Zebra, Equus burchelli antiquorum from the Krüger National Park |
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Journal Article |
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Year |
1975 |
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Koedoe |
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18 |
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139-146 |
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from Professor Hans Klingels Equine Reference List |
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1612 |
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Author |
Short Rv, |
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Title |
The evolution of the horse |
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Journal Article |
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Year |
1975 |
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J Reprod Fert Suppl |
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23 |
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1-6 |
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from Professor Hans Klingels Equine Reference List |
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1589 |
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Author |
Ruckebusch Y, |
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Title |
The hypnogram as an index of adaptation of farm animals to changes in their environment |
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1975 |
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App Anim Ethol |
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2 |
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3-18 |
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from Professor Hans Klingels Equine Reference List |
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1531 |
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Author |
Rossdale Pd, |
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Title |
Das Pferd, Fortpflanzung und Entwicklung |
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1975 |
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Karger 1975 |
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from Professor Hans Klingels Equine Reference List |
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1519 |
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