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Author |
Rubenstein Di, |
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Title |
Islands and their effects on the social organization of feral horses |
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1978 |
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ABS Symp |
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from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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1523 |
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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 |
Publication |
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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Rubenstein, D. |
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Xenophon Publishing |
Place of Publication |
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 |
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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2015 |
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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 |
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Wald |
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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.I. |
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Title |
Networks of terrestrial ungulates: linking form and function |
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Book Chapter |
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2015 |
Publication |
Animal Social Networks |
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Oxford University Press |
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Oxford |
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Krause, J., James, R., Franks, D. W., & Croft, D. P. |
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Equine Behaviour @ team @ |
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5884 |
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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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Year |
1994 |
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Animal Societies |
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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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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 |
Rubenstein Di, |
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Title |
Behavioural ecology of island feral horeses |
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Journal Article |
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Year |
1981 |
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Abbreviated Journal |
Equine. Vet. J. |
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13 |
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27-34 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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1524 |
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Nuñez, C.M.V.; Adelman, J.S.; Mason, C.; Rubenstein, D.I. |
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Title |
Immunocontraception decreases group fidelity in a feral horse population during the non-breeding season |
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Journal Article |
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Year |
2009 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
117 |
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1-2 |
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74-83 |
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Keywords |
Equus caballus; Horse; Harem; Stability; Immunocontraception; Porcine zona pellucidae (PZP); Behavior |
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Abstract |
The behavioral effects of the immunocontraceptive agent porcine zona pellucida (PZP) have not been adequately studied. Important managerial decisions for several species, including the wild horse (Equus caballus), have been based on this limited research. We studied 30 horses on Shackleford Banks, North Carolina, USA to determine the effects of PZP contraception on female fidelity to the harem male. We examined two classes of females: contracepts, recipients of the PZP vaccine (n = 22); and controls, females that have never received PZP (n = 8). We conducted the study during the non-breeding season from December 2005 to February 2006, totaling 102.2 h of observation. Contracepted mares changed groups more often than control mares (P = 0.04). Contracepts also visited more harem groups than did control mares (P = 0.02) and exhibited more reproductive interest (P = 0.05). For both contracepted and control females, the number of group changes (P = 0.01) and number of groups visited (P = 0.003) decreased with the proportion of years mares were pregnant. Our study shows that the application of PZP has significant consequences for the social behavior of Shackleford Banks horses. In gregarious species such as the horse, PZP application may disrupt social ties among individuals and inhibit normal social functioning at the population level. |
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0168-1591 |
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Equine Behaviour @ team @ |
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5095 |
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Author |
Krause Hoare; Hemelrijk; Rubenstein |
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Title |
Leadership in fish shoals |
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Journal Article |
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2000 |
Publication |
Fish and Fisheries |
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Fish Fish |
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1 |
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82-89 |
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directional locomotion; fish schools; front fish; nutritional state; schooling; shoal leadership; swimming direction |
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Leadership is not an inherent quality of animal groups that show directional locomotion. However, there are other factors that may be responsible for the occurrence of leadership in fish shoals, such as individual differences in nutritional state between group members. It appears that front fish have a strong influence on directional shoal movements and that individuals that occupy such positions are often characterised by larger body lengths and lower nutritional state. Potential interactions between the two factors and their importance for positioning within shoals need further attention. Initiation of directional movement in stationary shoals and position preferences in mobile shoals need to be addressed separately because they are potentially subject to different constraints. Individuals that initiate a swimming direction may not necessarily be capable of the sustained high swimming performance required to keep the front position or have the motivation to do so, for that matter. More empirical and theoretical work is necessary to look at the factors controlling positioning behaviour within shoals, as well as overall shoal shape and structure. Tracking of marked individuals whose positioning behaviour is monitored over extended time periods of hours or days would be useful. There is an indication that shoal positions are rotated by individuals according to their nutritional needs, with hungry fish occupying front positions only for as long as necessary to regain their nutritional balance. This suggests that shoal members effectively take turns at being leaders. There is a need for three-dimensional recordings of shoaling behaviour using high-speed video systems that allow a detailed analysis of information transfer in shoals of different size. The relationship between leadership and shoal size might provide an interesting field for future research. Most studies to date have been restricted to shoals of small and medium size and more information on larger shoals would be useful. |
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2067 |
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Author |
Gueron, S.; Levin, S.A.; Rubenstein, D.I. |
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Title |
The Dynamics of Herds: From Individuals to Aggregations |
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Journal Article |
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1996 |
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Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
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182 |
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1 |
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85-98 |
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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. |
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0022-5193 |
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Equine Behaviour @ team @ |
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5253 |
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