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Author |
Rubenstein, D. I., |
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Title |
Ecology and sociality in horses and zebras |
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Book Chapter |
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Year |
1986 |
Publication |
Ecological Aspects of Social Evolution |
Abbreviated Journal |
Ecological Aspects of Social Evolution |
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282-302 |
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Princeton University Press |
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Princeton, NJ. |
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Rubenstein, D. I. ; Wrangham, R. W. |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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1526 |
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Author |
Rubenstein, D.I |
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Title |
Life history and social organization in arid adapted ungulates |
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Journal Article |
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Year |
1989 |
Publication |
Journal of Arid Environments |
Abbreviated Journal |
J. Arid. Environ. |
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17 |
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145-156 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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yes |
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1527 |
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Author |
Rubenstein, D. I. |
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Title |
The ecology of female social behaviour in horses, zebras and asses |
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Book Chapter |
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Year |
1994 |
Publication |
Animal Societies |
Abbreviated Journal |
Animal Societies |
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13-28 |
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Kyoto University Press |
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Jarman, P.J.;, Rositter, A. |
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4-87698-014-4 |
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yes |
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1528 |
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Author |
Nuñez, C.M.V.; Adelman, J.S.; Smith, J.; Gesquiere, L.R.; Rubenstein, D.I. |
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Title |
Linking social environment and stress physiology in feral mares (Equus caballus): Group transfers elevate fecal cortisol levels |
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Journal Article |
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Year |
2014 |
Publication |
General and Comparative Endocrinology |
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196 |
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26-33 |
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Keywords |
Equus caballus; Fecal cortisol; Feral mare; Group transfer; Stress; Social instability |
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Abstract Feral horses (Equus caballus) have a complex social structure, the stability of which is important to their overall health. Behavioral and demographic research has shown that decreases in group (or band) stability reduce female fitness, but the potential effects on the physiological stress response have not been demonstrated. To fully understand how band stability affects group-member fitness, we need to understand not only behavioral and demographic, but also physiological consequences of decreases to that stability. We studied group changes in feral mares (an activity that induces instability, including both male and female aggression) on Shackleford Banks, NC. We found that mares in the midst of changing groups exhibit increased fecal cortisol levels. In addition, mares making more group transfers show higher levels of cortisol two weeks post-behavior. These results offer insights into how social instability is integrated into an animal’s physiological phenotype. In addition, our results have important implications for feral horse management. On Shackleford Banks, mares contracepted with porcine zona pellucida (PZP) make approximately 10 times as many group changes as do untreated mares. Such animals may therefore be at higher risk of chronic stress. These results support the growing consensus that links between behavior and physiological stress must be taken into account when managing for healthy, functional populations. |
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0016-6480 |
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Call Number |
Equine Behaviour @ team @ |
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5743 |
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Author |
Zhang, Y.; Cao, Q.S.; Rubenstein, D.I.; Zang, S.; Songer, M.; Leimgruber, P.; Chu, H.; Cao, J.; Li, K.; Hu, D. |
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Title |
Water Use Patterns of Sympatric Przewalski's Horse and Khulan: Interspecific Comparison Reveals Niche Differences |
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Journal Article |
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Year |
2015 |
Publication |
Plos One |
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Plos One |
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10 |
Issue |
7 |
Pages |
e0132094 |
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Acquiring water is essential for all animals, but doing so is most challenging for desert-living animals. Recently Przewalski's horse has been reintroduced to the desert area in China where the last wild surviving member of the species was seen before it vanished from China in the1960s. Its reintroduction placed it within the range of a close evolutionary relative, the con-generic Khulan. Determining whether or not these two species experience competition and whether or not such competition was responsible for the extinction of Przewalski's horses in the wild over 50 years ago, requires identifying the fundamental and realized niches of both species. We remotely monitored the presence of both species at a variety of water points during the dry season in Kalamaili Nature Reserve, Xinjiang, China. Przewalski's horses drank twice per day mostly during daylight hours at low salinity water sources while Khulans drank mostly at night usually at high salinity water points or those far from human residences. Spatial and temporal differences in water use enables coexistence, but suggest that Przewalski's horses also restrict the actions of Khulan. Such differences in both the fundamental and realized niches were associated with differences in physiological tolerances for saline water and human activity as well as differences in aggression and dominance. |
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Public Library of Science |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6377 |
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Author |
Fischhoff, I.; Dushoff, J.; Sundaresan, S.; Cordingley, J.; Rubenstein, D. |
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Title |
Reproductive status influences group size and persistence of bonds in male plains zebra (Equus burchelli) |
Type |
Journal Article |
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Year |
2009 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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Volume |
63 |
Issue |
7 |
Pages |
1035-1043-1043 |
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Keywords |
Biomedical and Life Sciences |
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Abstract |
Animal groups arise from individuals’ choices about the number, characteristics, and identity of associates. Individuals make these choices to gain benefits from their associations. As the needs of an individual change with its phenotype, so too we expect the nature of its associations to vary. In this paper, we investigate how the social priorities of male plains zebra (Equus burchelli) depend on reproductive state. An adult male is either a bachelor, and lacking mating access, or a stallion defending a harem. Multiple harems and bachelor males aggregate in larger herds. Herds frequently split and merge, affording males opportunities to change associates. Over a 4-year period, we sampled the herd associations in a population of 500–700 zebras. To isolate the effects of reproductive state on male social behavior, we account for potential confounding factors: changes in population size, grouping tendencies, and sampling intensity. We develop a generally applicable permutation procedure, which allows us to test the null hypothesis that social behavior is independent of male status. Averaging over all individuals in the population, we find that a typical bachelor is found in herds containing significantly more adults, bachelors, and stallions than the herds of a typical stallion. Further, bachelors’ bonds with each other are more persistent over time than those among stallions. These results suggest that bachelors form cohesive cliques, in which we may expect cooperative behaviors to develop. Stallion–stallion associations are more diffuse, and less conducive to long-term cooperation. |
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Springer Berlin / Heidelberg |
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0340-5443 |
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Equine Behaviour @ team @ |
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5193 |
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Author |
Rubenstein, D. |
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Title |
Social Networks: Linking Form with Function in Equid Societies |
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Conference Article |
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Year |
2015 |
Publication |
Proceedings of the 3. International Equine Science Meeting |
Abbreviated Journal |
Proc. 3. Int. Equine. Sci. Mtg |
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Animal societies develop from interactions and relationships that occur among individuals within populations. The fundamental tenet of behavioral ecology is that ecological factors shape behavior and determine the distribution and associations of individuals on landscapes. As a result, different social systems emerge in different habitats and under different environmental conditions. Since characterizing social systems depends on time and motion studies of individual actions and interactions that are often bilateral, such characterizations are often coarse-grained. If social relationships can be characterized using social networks, however, seemingly similar social organizations often reveal informative differences in terms of deep structure. Thus social network theory should be able to provide insights in to the connections between social form and function. This talk will explore how the network structures of horses, zebras and asses can provide novel insights into the functioning of animal societies with respect to the spread of memes, genes and diseases. |
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Corporate Author |
Rubenstein, D. |
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Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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Proc. 3. Int. Equine. Sci. Mtg |
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in prep |
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978-3-95625-000-2 |
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Id - |
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Equine Behaviour @ team @ |
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5797 |
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Author |
Rubenstein, D. |
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Title |
Wild Equid Movements: Impacts of Habitat Quality, Predation Pressure and Leadership |
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Conference Article |
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Year |
2012 |
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Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Animals spend much of their lives on the move searching for food, shelter and mates. As long-legged, large bodied species, equids are well suited for traveling long distances. Understanding where free-ranging equids go, why they choose particular locations, some near and some far, and what impact such movements have on patterns of sociality, demography and human livelihoods are only now coming into focus. This talk will explore how bottom-up factors, such as the abundance and distribution of key resources, and top-down factors, such as the type and location of predators, interact to shape overall movement patterns of equids, how leadership roles develop and what outcomes such movements are likely to have on human activities. |
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Corporate Author |
Rubenstein, D. |
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Xenophon Publishing |
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Wald |
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Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5556 |
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Author |
Ginsberg, J. R; Rubenstein, D. I. |
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Title |
Sperm competiton and variation in zebra mating behaviour |
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Journal Article |
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Year |
1990 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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Volume |
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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1113 |
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Rubenstein, D. I.; Hack, M. A. |
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Title |
Horse signals: The sounds and scents of fury |
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Journal Article |
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Year |
1992 |
Publication |
Evolutionary Ecology |
Abbreviated Journal |
Evol. Ecol. |
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6 |
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3 |
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254-260 |
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ommunication – combat – fighting ability – individual identity – signals – information – assessment – displays |
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During contests animals typically exchange information about fighting ability. Among feral horses these signals involve olfactory or acoustical elements and each type can effectively terminate contests before physical contact becomes necessary. Dung transplant experiments show that for stallions, irrespective of rank, olfactory signals such as dung sniffing encode information about familiarity suggesting that such signals can be used as signatures. As such they can provide indirect information about fighting ability as long as opponents associate identity with past performance. Play-back experiments, however, show that vocalizations, such as squeals, directly provide information about status regardless of stallion familiarity. Sonographs reveal that squeals of dominants are longer than those of subordinates and that only those of dominants have at their onset high-frequency components. |
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refbase @ user @ |
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506 |
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