| Records |
| 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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Pages |
23-30 |
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| Notes |
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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Pages |
235 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1534 |
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| Author |
Waring Gh, |
| Title |
Behavioral adaptation as a factor in management of feral equids |
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Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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Pages |
85-92 |
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| Notes |
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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Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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Pages |
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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Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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205-218 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1716 |
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| Author |
Woodward Sl, |
| Title |
Population dynamics of a herd of feral burros (Abstract) |
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Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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Pages |
219-220 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1719 |
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| Author |
Zervanos Sm, K.R. |
| Title |
Seasonal home ranges and activity patterns of feral assateague island ponies |
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Conference Volume |
| Year |
1979 |
Publication |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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3-14 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1753 |
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| Author |
Cameron, E.Z.; Linklater, W.L.; Stafford, K.J.; Minot, E.O. |
| Title |
Aging and improving reproductive success in horses: declining residual reproductive value or just older and wiser? |
Type |
Journal Article |
| Year |
2000 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
| Volume |
47 |
Issue |
4 |
Pages |
243-249 |
| Keywords |
Maternal investment – Equidae – Equus caballus |
| Abstract |
In many mammalian species, female success in raising offspring improves as they age. The residual reproductive value hypothesis predicts that each individual offspring will be more valuable to the mother as she ages because there is less conflict between the current and potential future offspring. Therefore, as mothers age, their investment into individual offspring should increase. Empirical evidence for an influence of declining residual reproductive value on maternal investment is unconvincing. Older mothers may not invest more, but may be more successful due to greater experience, allowing them to target their investment more appropriately (targeted reproductive effort hypothesis). Most studies do not preclude either hypothesis. Mare age significantly influenced maternal investment in feral horses living on the North Island of New Zealand. Older mares, that were more successful at raising foals, were more protective for the first 20 days of life, but less diligent thereafter. Total maternal input by older mothers did not seem to be any greater, but was better targeted at the most critical period for foal survival and a similar pattern was observed in mares that had lost a foal in the previous year. In addition, older mothers were more likely to foal in consecutive years, supporting the hypothesis that they are investing less than younger mares in individual offspring. Therefore, older mothers seem to become more successful by targeting their investment better due to experience, not by investing more in their offspring. |
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2019 |
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| Author |
Anderson, C.; Franks, N.R. |
| Title |
Teams in animal societies |
Type |
Journal Article |
| Year |
2001 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
| Volume |
12 |
Issue |
5 |
Pages |
534-540 |
| Keywords |
animal societies, cooperation, division of labor, groups, invertebrates, task types, teams, vertebrates |
| Abstract |
We review the existence of teams in animal societies. Teams have previously been dismissed in all but a tiny minority of insect societies. “Team” is a term not generally used in studies of vertebrates. We propose a new rigorous definition of a team that may be applied to both vertebrate and invertebrate societies. We reconsider what it means to work as a team or group and suggest that there are many more teams in insect societies than previously thought. A team task requires different subtasks to be performed concurrently for successful completion. There is a division of labor within a team. Contrary to previous reviews of teams in social insects, we do not constrain teams to consist of members of different castes and argue that team members may be interchangeable. Consequently, we suggest that a team is simply the set of individuals that performs a team task. We contrast teams with groups and suggest that a group task requires the simultaneous performance and cooperation of two or more individuals for successful completion. In a group, there is no division of labor--each individual performs the same task. We also contrast vertebrate and invertebrate teams and find that vertebrate teams tend to be associated with hunting and are based on individual recognition. Invertebrate teams occur in societies characterized by a great deal of redundancy, and we predict that teams in insect societies are more likely to be found in large polymorphic (“complex”) societies than in small monomorphic (“simple”) societies. |
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10.1093/beheco/12.5.534 |
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2070 |
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| Author |
Dall, S.R.X.; Giraldeau, L.-A.; Olsson, O.; McNamara, J.M.; Stephens, D.W. |
| Title |
Information and its use by animals in evolutionary ecology |
Type |
Journal Article |
| Year |
2005 |
Publication |
Trends in Ecology & Evolution (Personal Edition) |
Abbreviated Journal |
Trends Ecol Evol |
| Volume |
20 |
Issue |
4 |
Pages |
187-193 |
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| Abstract |
Information is a crucial currency for animals from both a behavioural and evolutionary perspective. Adaptive behaviour relies upon accurate estimation of relevant ecological parameters; the better informed an individual, the better it can develop and adjust its behaviour to meet the demands of a variable world. Here, we focus on the burgeoning interest in the impact of ecological uncertainty on adaptation, and the means by which it can be reduced by gathering information, from both 'passive' and 'responsive' sources. Our overview demonstrates the value of adopting an explicitly informational approach, and highlights the components that one needs to develop useful approaches to studying information use by animals. We propose a quantitative framework, based on statistical decision theory, for analysing animal information use in evolutionary ecology. Our purpose is to promote an integrative approach to studying information use by animals, which is itself integral to adaptive animal behaviour and organismal biology. |
| Address |
Centre for Ecology and Conservation, University of Exeter in Cornwall, Tremough Campus, Penryn, UK, TR10 9EZ. sashadall@iname.com |
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English |
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0169-5347 |
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PMID:16701367 |
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2128 |
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