| Records |
| Author |
Vahl, W.K.; Lok, T.; van der Meer, J.; Piersma, T.; Weissing, F.J. |
| Title |
Spatial clumping of food and social dominance affect interference competition among ruddy turnstones |
Type |
Journal Article |
| Year |
2005 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
| Volume |
16 |
Issue |
5 |
Pages |
834-844 |
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| Abstract |
In studying the success of foraging animals, studies of interference competition have put emphasis on effects of competitor density, whereas studies of resource defense have focused on the effects of the spatial distribution of food within patches. Very few studies have looked at both factors simultaneously, that is, determined whether the effects of competitor density on foraging success depend on the spatial distribution of food. We studied the behavior and the foraging success of ruddy turnstones (Arenaria interpres) using an experiment in which we varied both the presence of a competitor and the food distribution. Because turnstones may differ strongly in their relative dominance status, we also experimentally varied the foragers' relative dominance status. We found that the presence of a competitor only reduced the foraging success of subordinate birds foraging at the clumped food distribution. At this condition, dominant and subordinate birds differed markedly in their foraging success. Contrary to our expectations, we did not observe more agonistic behavior at the clumped food distribution. This indicates that the amount of agonistic behavior observed may be a bad indicator of interference effects. These findings have specific implications for models of interference competition. Most notably they show that the effects of competitor density on agonistic behavior and foraging success may well depend on the spatial distribution of food and the foragers' relative dominance status. Additionally, our results suggest that social dominance will not be fully understood without considering long-term processes such as the formation and maintenance of social dominance hierarchies. |
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10.1093/beheco/ari067 |
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no |
| Call Number |
refbase @ user @ |
Serial |
761 |
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| Author |
Pusey, A. E.; Packer, C. |
| Title |
The Ecology of relationships |
Type |
Book Chapter |
| Year |
2003 |
Publication |
Behavioural Ecology |
Abbreviated Journal |
Behav. Ecol. |
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Issue |
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Pages |
254 -283 |
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Blackwell Scientific Publication |
Place of Publication |
Oxford |
Editor |
Krebs, J.R.; Davis, N.B.; |
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no |
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refbase @ user @ |
Serial |
820 |
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| Author |
Asa Cs, |
| Title |
Sociosexual behavior in the domestic pony |
Type |
Conference Article |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of Wild and Feral Equids |
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59-70 |
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Univ. of Wyoming. |
Place of Publication |
Laramie |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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900 |
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| Author |
Ayeni, J.S.O. |
| Title |
Utilization of waterholes in Tsavo National Park (East) |
Type |
Journal Article |
| Year |
1975 |
Publication |
African Journal of Ecology |
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13 |
Issue |
3-4 |
Pages |
305-323 |
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| Abstract |
Summary Utilization of waterholes by wildlife was studied between April, 1973 and July, 1974 in Tsavo National Park (East), south of the Voi river. Seasonality was an important factor which influenced the various aspects of waterhole utilization. The numbers of the herbivores utilizing the waterholes increased during the dry season but fell during the rains. Some ungulates also moved near to the artificial waterholes in the dry season but moved away from them during the rains when they drank from natural water-holes formed in clay pans filled with rain water. A basic pattern of waterhole utilization dominated by small (adult-size) species during day-time 06.00–18.00 hours and larger species at night 18.00–06.00 hours is described. The separation in times of arrival and deparature peaks of waterhole utilization, and average coincidence of percentages of paired species populations are used to show that big-game attained a measure of time-spaced ecological separation at the waterholes. The water relations of some day-time and night-time drinkers are discussed. From the baseline study the management implications of the development of additional waterholes in the park are discussed. |
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Blackwell Publishing Ltd |
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1365-2028 |
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no |
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Equine Behaviour @ team @ |
Serial |
5364 |
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| Author |
Conley W, |
| Title |
The potential for increase in horse and ass populations: A theoretical analysis |
Type |
Journal Article |
| Year |
1979 |
Publication |
Proceedings of a Conference on the Ecology and Behavior of Feral Equids |
Abbreviated Journal |
Symp Ecol and Behav of wild and feral Equids, Laramie |
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Issue |
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Pages |
221-234 |
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R.H. Denniston |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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991 |
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| Author |
Ginsberg, J. R; Rubenstein, D. I. |
| Title |
Sperm competiton and variation in zebra mating behaviour |
Type |
Journal Article |
| Year |
1990 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
| Volume |
26 |
Issue |
6 |
Pages |
427-434 |
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Data are presented on the breeding behavior of two zebra species to test whether intra- and interspecific variation in male reproductive behavior and physiology are correlated with differences in female promiscuity. In one species, plains zebra (Equus burchelli) females live in closed membership single male groups and mate monandrously. In the other species, the Grevy's zebra (E. grevyi) females live in groups whose membership is much more temporary. Typically, associations with individual males are brief and mating is polyandrous. However, some females – those having just given birth – reside with one male for long periods, mating monandrously. These differences in female mating behavior generate variability in the potential for sperm competition. We show that behavioral differences in male investment in reproductive activities correlate with the potential for sperm competition. When mating with promiscuous mares, Grevy's zebra stallions made a greater investment in reproductive behavior (calling, mounting, ejaculations) than did stallions of either species when mating with monandrous females. The evolution of large testes size in the Grevy's zebra, when compared to the congeneric plains zebra, horse, and mountain zebra, allows for this increased investment. |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Serial |
1113 |
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| Author |
Keiper Rr, |
| Title |
Population dynamics of feral ponies. |
Type |
Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids |
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Issue |
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Pages |
175-184 |
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Symposium on the Ecology and Behavior of wild and feral Equids |
Place of Publication |
Laramie |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1252 |
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| Author |
Kahurananga, J.; Silkiluwasha, F. |
| Title |
The migration of zebra and wildebeest between Tarangire National Park and Simanjiro Plains, northern Tanzania, in 1972 and recent trends |
Type |
Journal Article |
| Year |
1997 |
Publication |
African Journal of Ecology |
Abbreviated Journal |
Afr J Ecol |
| Volume |
35 |
Issue |
3 |
Pages |
179-185 |
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In 1972, four aerial censuses were carried out to assess the annual migration of zebra and wildebeest between Tarangire National Park and Simanjiro Plains. About 6000 zebra and 10,000 wildebeest were in the Plains in the middle of the rainy season, in April. During the dry season in August the animals were concentrated in the Park. The migration from the Park to the Plains started at beginning of the rains, in November/December. Recent censuses by Tanzania Wildlife Conservation Monitoring (TWCM, 1991, 1995) indicate that an estimated 23,000 zebra and 11,000 wildebeest migrate into the Park from Simanjiro and other wet season areas. Encroaching cultivation is a threat to the migration corridors and sustainability of the ecosystem . Providing benefits from wildlife to communities around the park would safeguard the future of the wildlife. |
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Equine Behaviour @ team @ Kahurananga1997 |
Serial |
2312 |
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| Author |
Klingel H, |
| Title |
A Comparison of the Social Organization of the Equids. in Denniston RH (ed) |
Type |
Conference Volume |
| Year |
1980 |
Publication |
Symposium on the Ecology and Behavior of Wild and Feral Equids, Laramie 1979 |
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23-30 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1315 |
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| Author |
Ruffner Ga, C.S. |
| Title |
Age structure, condition, and reproduction of two burro (Equus asinus) populations from Grand Canyon National Park, Arizona |
Type |
Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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| Volume |
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Pages |
235 |
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from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1534 |
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