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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
	Keywords
	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.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1113
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	Author	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
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	Princeton University Press	Place of Publication	Princeton, NJ.	Editor	Rubenstein, D. I. ; Wrangham, R. W.
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1526
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	Author	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
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	yes
	Call Number				Serial	1527
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	Author	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
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	Kyoto University Press	Place of Publication		Editor	Jarman, P.J.;, Rositter, A.
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN	4-87698-014-4	Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number				Serial	1528
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	Author	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
	Keywords
	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.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2360
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	Author	Fischhoff, I.R.; Sundaresan, S.R.; Cordingley, J.; Rubenstein, D.I.
	Title	*Habitat use and movements of plains zebra (Equus burchelli) in response to predation danger from lions*			Type	Journal Article
	Year	2007	Publication	Behavioral Ecology	Abbreviated Journal	Behav. Ecol.
	Volume	18	Issue	4	Pages	725-729
	Keywords
	Abstract	Prey species must adapt their behavior to avoid predation. As a key prey item for lions (Panthera leo), plains zebras (Equus burchelli) were expected to respond to immediate threats posed by lions in their area. In addition, zebras were predicted to exhibit behavior tuned to reduce the potential for encounters with lions, by modifying their movement patterns in the times of day and habitats of greatest lion danger. We studied a population of approximately 600 plains zebra living in Ol Pejeta Conservancy, Kenya. We found that zebra abundance on or near a grassland patch was lower if lions had also been observed on that patch during the same day. Predation danger was highest in grassland habitat during the night, when lions were more active. Zebra sightings and global positioning system radio collar data indicated that zebras also reduced their use of grassland at night, instead using more woodland habitat. Zebras moved faster and took sharper turns in grassland at night. It is hypothesized that these more erratic movements assist zebras in avoiding detection or capture by lions.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	10.1093/beheco/arm036			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	4360
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	Author	Gueron, S.; Levin, S.A.; Rubenstein, D.I.
	Title	The Dynamics of Herds: From Individuals to Aggregations			Type	Journal Article
	Year	1996	Publication	Journal of Theoretical Biology	Abbreviated Journal	J. Theor. Biol.
	Volume	182	Issue	1	Pages	85-98
	Keywords
	Abstract	The dynamic behavior of small herds is investigated by means of simulations of two-dimensional discrete-stochastic models. An individual-based approach is used to relate collective behavior to individual decisions. In our model, the motion of an individual in a herd is assumed to be the combined result of both density-independent and density-dependent decisions, in the latter case based on the influence of surrounding neighbors; assumed decision rules are hierarchical, balancing short range repulsion against long-range attraction. The probability of fragmentation of the model herd depends on parameter values. We explore the variety and characteristics of spatial patterns that develop during migration, for herds that are homogeneous and heterogeneous regarding intrinsic walking speeds. Group integrity can be maintained even in mixed populations, but fragmentation results for these more easily than for a homogeneous herd. Observations of natural populations suggest that animals move away from individuals that intrude too closely into their environment, but are attracted to individuals at a distance. Between these extremes, there appears to be a neutral zone, within which other individuals engender no response. We explore the importance of this neutral zone, and offer evolutionary interpretations. In particular, the neutral zone, if not too large, permits the individual to remain in contact with the herd, while reducing the frequency with which acceleration or deceleration must be undertaken. This offers obvious energetic benefits.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0022-5193	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5253
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	Author	Parker, G.A.; Rubenstein, D.I.
	Title	Role assessment, reserve strategy, and acquisition of information in asymmetric animal conflicts			Type	Journal Article
	Year	1981	Publication	Animal Behaviour.	Abbreviated Journal	Anim. Behav.
	Volume	29	Issue	1	Pages	221-240
	Keywords
	Abstract	It was formerly argued that alternative evolutionarily stable strategies (ESSs) are possible for animal contests characterized by some asymmetry that can be perceived with perfect accuracy. Where roles A and B refer to the asymmetry between opponents, ESSs are: [`]fight when A, retreat when B', and vice versa. Either can be an ESS, but only if the [`]reserve strategy' (=what an animal does when it fights) is sufficiently damaging. We examine the [`]war of attrition' (winner = opponent that persists longer). In a population at either ESS, reserve strategy is never normally shown; it is therefore subject to drift unless the selective action of rare individuals which break the convention is considered. These could arise either by mutation or by mistakes in role assessment. When mutations and mistakes simply specify that occasionally an animal fights when it [`]should' retreat, selection adjusts reserve strategy to a level where only one ESS (the [`]commonsense' ESS) is possible, if the asymmetry is relevant to payoff. Thus for asymmetries in fighting ability or resource value, the individual with the lower score will retreat. However, we are particularly concerned with cases where both payoff-relevant aspects (fighting ability and resource value) are asymmetric. If opponents sustain contest costs at rates KA and KB, and their resource values are VA and VB, an [`]optimal assessor' strategy defined by the interaction between the two asymmetries, is a unique ESS. It obeys the rule [`]fight on estimating role A, where VA/KA>VB/KB; retreat in B'. If mistakes can occur in both roles, but are very rate, the ESS is not fundamentally altered though there will be infinitesimal tendencies for persisting in role B. Selection to improve assessment abilities intensifies as abilities improve, but is weak if roles A and B are rather similar. Over a range of similarity between roles, an [`]owner wins' convention may be adopted if ownership correlates positively with role A and an individual cannot tell when it would otherwise pay him to break the convention. We also examine a contest in which information about roles can be acquired only during a contest itself, and at a cost. Much depends on the rate at which information is acquired relative to the rate at which costs are expended, and on whether contests normally escalate in intensity, remain at the same level, or de-escalate. Selection favours short contests when costs are high relative to resource value, where the outcome of a round contains much information about fighting ability, and where the actual disparity in fighting ability is large.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0003-3472	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5325
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	Author	Rubenstein, D.
	Title	Wild Equid Movements: Impacts of Habitat Quality, Predation Pressure and Leadership			Type	Conference Article
	Year	2012	Publication	Proceedings of the 2. International Equine Science Meeting	Abbreviated Journal	Proc. 2. Int. Equine. Sci. Mtg
	Volume	in press	Issue		Pages
	Keywords
	Abstract	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.
	Address
	Corporate Author	Rubenstein, D.			Thesis
	Publisher	Xenophon Publishing	Place of Publication	Wald	Editor	Krueger, K.
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	978-3-9808134-26	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5556
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	Author	Rubenstein, D.
	Title	Social Networks: Linking Form with Function in Equid Societies			Type	Conference Article
	Year	2015	Publication	Proceedings of the 3. International Equine Science Meeting	Abbreviated Journal	Proc. 3. Int. Equine. Sci. Mtg
	Volume		Issue		Pages
	Keywords
	Abstract	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.
	Address
	Corporate Author	Rubenstein, D.			Thesis
	Publisher	Xenophon Publishing	Place of Publication	Wald	Editor	Krueger, K.
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title	Proc. 3. Int. Equine. Sci. Mtg
	Series Volume	in prep	Series Issue		Edition
	ISSN		ISBN	978-3-95625-000-2	Medium
	Area		Expedition		Conference
	Notes	Id -			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5797
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