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Author (up) Rubenstein, D. I.
Title The ecology of female social behaviour in horses, zebras and asses Type Book Chapter
Year 1994 Publication Animal Societies Abbreviated Journal Animal Societies
Volume Issue Pages 13-28
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Publisher Kyoto University Press Place of Publication Editor Jarman, P.J.;, Rositter, A.
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ISSN ISBN 4-87698-014-4 Medium
Area Expedition Conference
Notes Approved yes
Call Number Serial 1528
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Author (up) Rubenstein, D. I.,
Title Ecology and sociality in horses and zebras Type Book Chapter
Year 1986 Publication Ecological Aspects of Social Evolution Abbreviated Journal Ecological Aspects of Social Evolution
Volume Issue Pages 282-302
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Publisher Princeton University Press Place of Publication Princeton, NJ. Editor Rubenstein, D. I. ; Wrangham, R. W.
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number Serial 1526
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Author (up) Rubenstein, D. I.; Hack, M. A.
Title Horse signals: The sounds and scents of fury Type Journal Article
Year 1992 Publication Evolutionary Ecology Abbreviated Journal Evol. Ecol.
Volume 6 Issue 3 Pages 254-260
Keywords ommunication – combat – fighting ability – individual identity – signals – information – assessment – displays
Abstract 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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Notes Approved no
Call Number refbase @ user @ Serial 506
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Author (up) Rubenstein, D.I
Title Life history and social organization in arid adapted ungulates Type Journal Article
Year 1989 Publication Journal of Arid Environments Abbreviated Journal J. Arid. Environ.
Volume 17 Issue Pages 145-156
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Notes from Professor Hans Klingels Equine Reference List Approved yes
Call Number Serial 1527
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Author (up) Rubenstein, D.I.; Hohmann, M.E
Title Parasites and Social Behavior of Island Feral Horses Type Journal Article
Year 1989 Publication Oikos Abbreviated Journal Oikos
Volume 3 Issue Pages 312-320
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Abstract The horses of Shackelford Banks, North Carolina, USA, are heavily parasitized by intestinal worms and harassed by dipterans, and although both types influence behavior only internal parasites affect bodily condition and the structuring of horse society. Thirteen species of internal parasites were identified, but only 4 of 13 groups contain them all and even within groups differences among individuals are large. Among individuals ova emissions vary ranging from 50 to 76,875 eggs per gram. The most important environmental factors influencing egg production are season and a group's location on the island, presumably because of salinity and soil differences and their effects on ova survival. Of the social and life history factors, age, and group size, but neither reproductive state nor dominance status are important. The fitness consequences of internal parasitism may be large since the number emitted is negatively correlated with next year's bodily condition. Biting fly burdens are also affected by a variety of environmental factors. In general, horses are covered with more flies on sunny days, when winds are moderately brisk, when occupying dunes, and around mid-day. In contrast to endoparasites, fly burden is affected by reproductive condition and dominance status and tends to decrease as groups increase in size. Since groups do not grow very large, nor do females attempt to bring groups together, the negative effects of endoparasites appear to overide those associated with ectoparasites. Consequently, endoparasites appear to exert a stronger influence on social structure, even though ectoparasites seem to play a stronger role in shaping details of behavior.
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 2360
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Author (up) Sundaresan, S.R.; Fischhoff, I.R.; Dushoff, J.; Rubenstein, D.I.
Title Network metrics reveal differences in social organization between two fission-fusion species, Grevy's zebra and onager Type Journal Article
Year 2007 Publication Oecologia Abbreviated Journal Oecologia
Volume 151 Issue 1 Pages 140-149
Keywords Analysis of Variance; Animals; Behavior, Animal/*physiology; *Environment; Equidae/*physiology; Female; India; Kenya; Male; *Models, Theoretical; *Social Behavior; *Social Environment
Abstract For species in which group membership frequently changes, it has been a challenge to characterize variation in individual interactions and social structure. Quantifying this variation is necessary to test hypotheses about ecological determinants of social patterns and to make predictions about how group dynamics affect the development of cooperative relationships and transmission processes. Network models have recently become popular for analyzing individual contacts within a population context. We use network metrics to compare populations of Grevy's zebra (Equus grevyi) and onagers (Equus hemionus khur). These closely related equids, previously described as having the same social system, inhabit environments differing in the distribution of food, water, and predators. Grevy's zebra and onagers are one example of many sets of coarsely similar fission-fusion species and populations, observed elsewhere in other ungulates, primates, and cetaceans. Our analysis of the population association networks reveals contrasts consistent with their distinctive environments. Grevy's zebra individuals are more selective in their association choices. Grevy's zebra form stable cliques, while onager associations are more fluid. We find evidence that females associate assortatively by reproductive state in Grevy's zebra but not in onagers. The current approach demonstrates the utility of network metrics for identifying fine-grained variation among individuals and populations in association patterns. From our analysis, we can make testable predictions about behavioral mechanisms underlying social structure and its effects on transmission processes.
Address Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA. ssundare@princeton.edu
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Publisher Place of Publication Editor
Language English Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 0029-8549 ISBN Medium
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Notes PMID:16964497 Approved no
Call Number Serial 1863
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Author (up) Zhang, Y.; Cao, Q.S.; Rubenstein, D.I.; Zang, S.; Songer, M.; Leimgruber, P.; Chu, H.; Cao, J.; Li, K.; Hu, D.
Title Water Use Patterns of Sympatric Przewalski's Horse and Khulan: Interspecific Comparison Reveals Niche Differences Type Journal Article
Year 2015 Publication Plos One Abbreviated Journal Plos One
Volume 10 Issue 7 Pages e0132094
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Abstract 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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Publisher Public Library of Science Place of Publication Editor
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 6377
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