Records |
Author |
Shrader, A.M.; Kerley, G.I.H.; Kotler, B.P.; Brown, J.S. |
Title |
Social information, social feding, and competition in group-living goats (Capra hircus) |
Type |
Journal Article |
Year |
2007 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
Volume |
18 |
Issue |
1 |
Pages |
103-107 |
Keywords |
fear, group foraging, harvest rates, intraspecific competition, social information. |
Abstract |
There are both benefits (e.g., social information) and costs (e.g., intraspecific competition) for individuals foraging in groups. To ascertain how group-foraging goats (Capra hircus) deal with these trade-offs, we asked 1) do goats use social information to make foraging decisions and 2) how do they adjust their intake rate in light of having attracted by other group members? To establish whether goats use social information, we recorded their initial choice of different quality food patches when they were ignorant of patch quality and when they could observe others foraging. After determining that goats use social information, we recorded intake rates while they fed alone and in the presence of potential competitors. Intake rate increased as the number of competitors increased. Interestingly, lone goats achieved an intake rate that was higher than when one competitor was present but similar to when two or more competitors were present. Faster intake rates may allow herbivores to ingest a larger portion of the available food before competing group members arrive at the patch. This however, does not explain the high intake rates achieved when the goats were alone. We provide 2 potential explanations: 1) faster intake rates are a response to greater risk incurred by lone individuals, the loss of social information, and the fear of being left behind by the group and 2) when foraging alone, intake rate is no longer a trade-off between reducing competition and acquiring social information. Thus, individuals are able to feed close to their maximum rate. |
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10.1093/beheco/arl057 |
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refbase @ user @ |
Serial |
814 |
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Author |
Healy,S.; Braithwaite, V |
Title |
Cognitive ecology: a field of substance? |
Type |
Journal Article |
Year |
2000 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
Volume |
15 |
Issue |
1 |
Pages |
22-26 |
Keywords |
Cognitive ecology; Neuroethology; Cognition; Ecology; Evolution; Orientation mechanisms |
Abstract |
In 1993, Les Real invented the label 'cognitive ecology'. This label was intended for work that brought cognitive science and behavioural ecology together. Real's article stressed the importance of such an approach to the understanding of behaviour. At the end of a decade in which more interdisciplinary work on behaviour has been seen than for many years, it is time to assess whether cognitive ecology is a label describing an active field. |
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Division of Biological Sciences, King's Buildings, University of Edinburgh, West Mains Road, Edinburgh, UK EH9 3JT |
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English |
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0169-5347 |
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PMID:10603501 |
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refbase @ user @ |
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837 |
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Author |
Conley W, |
Title |
The potential for increase in horse and ass populations: A theoretical analysis |
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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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221-234 |
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R.H. Denniston |
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from Professor Hans Klingels Equine Reference List |
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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 |
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Journal Article |
Year |
1990 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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26 |
Issue |
6 |
Pages |
427-434 |
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Abstract |
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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from Professor Hans Klingels Equine Reference List |
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yes |
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Serial |
1113 |
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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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Abstract |
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 |
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2312 |
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Author |
Klingel H, |
Title |
A Comparison of the Social Organization of the Equids. in Denniston RH (ed) |
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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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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 |
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Conference Volume |
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1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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235 |
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from Professor Hans Klingels Equine Reference List |
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1534 |
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Author |
Waring Gh, |
Title |
Behavioral adaptation as a factor in management of feral equids |
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1979 |
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Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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85-92 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1697 |
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Author |
Wolfe Ml, |
Title |
Feral horse demography: A preliminary report (Abstract) |
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1979 |
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Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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173-174 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1715 |
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Author |
Wolfe Ml, |
Title |
Population ecology of the kulan |
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1979 |
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Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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205-218 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1716 |
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