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Fischhoff, I.R.; Sundaresan, S.R.; Cordingley, J.; Rubenstein, D.I. |
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Habitat use and movements of plains zebra (Equus burchelli) in response to predation danger from lions |
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2007 |
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Behavioral Ecology |
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Behav. Ecol. |
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18 |
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4 |
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725-729 |
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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. |
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10.1093/beheco/arm036 |
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Equine Behaviour @ team @ |
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4360 |
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Wittemyer, G.; Getz, W.M. |
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Hierarchical dominance structure and social organization in African elephants, Loxodonta africana |
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2007 |
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Animal Behaviour. |
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Anim. Behav. |
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73 |
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4 |
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671-681 |
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African elephant; between-group competition; Loxodonta africana; nepotism; resource distribution; socioecology; transitive dominance; within-group competition |
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According to the socioecological framework, transitivity (or linearity) in dominance relationships is related to competition over critical resources. When a population is structured into groups, the intensity of between- versus within-group competition influences the form and function of its social organization. Few studies have compared the type and relative intensity of competition at these two levels. African elephants have well-structured social relations, providing an exemplary system for such a study. We report on dominance hierarchies among free-ranging elephants and evaluate the factors that drive their socioecological structure to lie in a region of the three-dimensional nepotism/despotism/tolerance space rarely observed among social species; namely, where non-nepotistic, transitive dominance hierarchies within groups emerge despite kin-based philopatry and infrequent agonistic interactions over widely distributed resources. We found significant transitivity in dominance hierarchies between groups. Dominance relations among the matriarchs of different social groups were primarily age based, rather than driven by physical or group size, and group matriarch rank influenced the dominance relationships among nonmatriarchal females in the population. Our results suggest that between-group dominance relationships induce tolerance among group members, which in combination with high group relatedness, reduces the benefits of nepotism. We postulate that cognitive abilities and high risk of injury in contests enhance winner and loser effects, facilitating the formation of transitive dominance relationships, despite widely distributed resources over which infrequent competition occurs. The interplay of cognitive abilities, winner and loser effects, resource distribution, and within- and between-group dominance relationships may produce behaviour in other strongly social mammals that differs from that predicted by a superficial application of current socioecological models. |
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Hübener, Eberhard |
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Horse-Appropriate Aids And Their Timer |
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2007 |
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www.reiten-lesen-denken.de |
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Harmony between man and horse, and the rider`s understanding of the function of a horse`s body and mind – these are things that knowledgeable horsemen have demanded for centuries. Constant, focussed attention enables the horse to understand barely visible signals from its herd leader or its rider (!) and to act upon them instantly. Thus it is not necessary to treat a horse as if it were either unwilling or deaf.
When the rider sits in perfect balance, his leg tends to fall “self-actively” against the horse`s trunk as it swings away when the horse`s hind leg on the same side moves forwards. This is the only moment in which a horse is able to immediately follow the signal from the rider to move forwards, sideways, or to hold back. Video footage proves what we already knew more than a hundred years ago, but which our sports organisations have somehow managed to forget. Of course we should not let our leg fall against the horse all the time, because then the horse will not register this as a signal. It is explained how to “switch on” and “switch off” the leg signals.
For the equestrian standards in this country, it is essential that young riders are familiarized with the “self-active” leg, as soon as they are halfway firm in the saddle. Youngsters learn this easily and never forget it again; it is far more difficult for adults, as the pelvic ring is no longer so flexible. As there is a definite lack of good riding lessons, an instructive video on this subject would be extremely useful. Sponsors are urgently required!
For riders who have mastered the balanced seat and can feel how their leg falls against the horse`s trunk as it swings away, riding becomes primarily a matter of self discipline.
If we do not examine these matters scientifically, we are in danger of loosing the most important elements of the equestrian art. With this thought in mind, the author uses this essay to argue once again for interdisciplinary research of equitation at universities, and for the support of these projects by high ranking organisations. |
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Reiten Lesen Denken @ eberhardhuebener @ |
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4320 |
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Watanabe, S. |
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How animal psychology contributes to animal welfare |
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2007 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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106 |
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4 |
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193-202 |
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Animal welfare; Anthropomorphism; Animal psychology; Reinforcement; Socially constructed concept |
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This article explores the contribution of animal psychology to animal welfare. Since animal welfare includes subjective welfare, it is crucial to know the subjective world of animals. Analysis of the concept of anthropomorphism is particularly important because it is a basic idea of animal ethics. The history of animal psychology, focusing on anthropomorphism and behaviourism, is briefly described, and then measurement of the subjective experience of animals in two ways, namely animal cognition and pleasure or reinforcing effects, is reported. Finally, it is suggested that animal welfare is not a permanently fixed idea, but a socially constructed one that can be changed. To gain widespread agreement about a socially constructed idea, it is important to know in which circumstances ordinary people employ metaphorical extension to an understanding of animal behaviour. In other words, a survey of “folk animal psychology” is important in order to establish a consensus about animal welfare. |
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Equine Behaviour @ team @ |
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2888 |
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Murray, R.C.; Branch, M.V.; Dyson, S.J.; Parkin, T.D.H.; Goodship, A.E. |
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How does exercise intensity and type affect equine distal tarsal subchondral bone thickness? |
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2007 |
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Journal of Applied Physiology (Bethesda, Md. : 1985) |
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J Appl Physiol |
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102 |
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6 |
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2194-2200 |
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Adaptation of osteochondral tissues is based on the strains experienced during exercise at each location within the joint. Different exercise intensities and types may induce particular site-specific strains, influencing osteochondral adaptation and potentially predisposing to injury. Our hypotheses were that patterns of equine distal tarsal subchondral bone (SCB) thickness relate to the type and intensity of exercise, and that high-intensity exercise leads to site-specific increases in thickness. SCB thickness was measured at defined dorsal and plantar locations on magnetic resonance images of cadaver tarsi collected from horses with a history of low [general purpose (n=20) and horse walker (n=6)] or high [elite competition (n=12), race training (n=15), and treadmill training (n=4)] exercise intensity. SCB thickness was compared between sites within each exercise group and between exercise groups. SCB thickness in elite competition and race training, but not treadmill training, was greater than low-intensity exercise. For general purpose horses, lateral SCB thickness was greater than medial throughout. Horse walker exercise led to relatively thicker lateral and medial SCB compared with the midline. Elite competition was associated with increased SCB thickness of the proximal small tarsal bones medially and the distal bones laterally. For race training and treadmill training, there were minimal differences between sites overall, although the lateral aspect was greater than medial, and medial greater than midline at a few sites for race training. In conclusion, different types of high-intensity exercise were associated with different patterns of SCB thickness across the joints from medial to lateral and proximal to distal, indicating that both exercise intensity and type of exercise affect the SCB response at any particular site within the equine distal tarsal joints. |
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Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk CB8 7UU, United Kingdom. rachel.murray@aht.org.uk |
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8750-7587 |
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PMID:17332271 |
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Equine Behaviour @ team @ |
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4021 |
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Sovrano, V.A.; Bisazza, A.; Vallortigara, G. |
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How fish do geometry in large and in small spaces |
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2007 |
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Animal Cognition |
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Anim. Cogn. |
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10 |
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1 |
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47-54 |
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Animals; *Association Learning; Color Perception; Cues; *Discrimination Learning; *Distance Perception; *Fishes; Male; Pattern Recognition, Visual; Social Environment; *Space Perception; Visual Perception |
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It has been shown that children and non-human animals seem to integrate geometric and featural information to different extents in order to reorient themselves in environments of different spatial scales. We trained fish (redtail splitfins, Xenotoca eiseni) to reorient to find a corner in a rectangular tank with a distinctive featural cue (a blue wall). Then we tested fish after displacement of the feature on another adjacent wall. In the large enclosure, fish chose the two corners with the feature, and also tended to choose among them the one that maintained the correct arrangement of the featural cue with respect to geometric sense (i.e. left-right position). In contrast, in the small enclosure, fish chose both the two corners with the features and the corner, without any feature, that maintained the correct metric arrangement of the walls with respect to geometric sense. Possible reasons for species differences in the use of geometric and non-geometric information are discussed. |
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Department of General Psychology, University of Padua, Via Venezia, 8, 35131, Padova, Italy. valeriaanna.sovrano@unipd.it |
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PMID:16794851 |
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Equine Behaviour @ team @ |
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2462 |
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Cantlon, J.F.; Brannon, E.M. |
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How Much Does Number Matter to a Monkey (Macaca mulatta)? |
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2007 |
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Journal of Experimental Psychology: Animal Behavior Processes |
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32-41 |
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numerical cognition; Weber's law; nonhuman primates; numerosity |
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Although many animal species can represent numerical values, little is known about how salient number is relative to other object properties for nonhuman animals. In one hypothesis, researchers propose that animals represent number only as a last resort, when no other properties differentiate stimuli. An alternative hypothesis is that animals automatically, spontaneously, and routinely represent the numerical attributes of their environments. The authors compared the influence of number versus that of shape, color, and surface area on rhesus monkeys' (Macaca mulatta) decisions by testing them on a matching task with more than one correct answer: a numerical match and a nonnumerical (color, surface area, or shape) match. The authors also tested whether previous laboratory experience with numerical discrimination influenced a monkey's propensity to represent number. Contrary to the last-resort hypothesis, all monkeys based their decisions on numerical value when the numerical ratio was favorable. |
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Equine Behaviour @ team @ |
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2891 |
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Harris, P.A. |
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How should we feed horses – and how many times a day? |
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2007 |
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The Veterinary Journal |
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173 |
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2 |
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252-253 |
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Admin @ knut @ |
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Lloyd, N.; Mulcock, J. |
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Human-animal studies in Australia: Current directions |
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2007 |
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Society and Animals |
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1-5 |
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Australia – human-nonhuman animal relationships – Human-Animal Studies – multidisciplinary |
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In 2004, Natalie Lloyd and Jane Mulcock initiated the Australian Animals & Society Study Group, a network of social science, humanities and arts scholars that quickly grew to include more than 100 participants. In July 2005, about 50 participants attended the group“s 4-day inaugural conference at the University of Western Australia, Perth. Papers in this issue emerged from the conference. They exemplify the Australian academy”s work in the fields of History, Population Health, Sociology, Geography, and English and address strong themes: human-equine relationships; management of native and introduced animals; and relationships with other domestic, nonhuman animals-from cats and dogs to cattle. Human-Animal Studies is an expanding field in Australia. However, many scholars, due to funding and teaching concerns, focus their primary research in different domains. All authors in this issue-excepting one-are new scholars in their respective fields. The papers represent the diversity and innovation of recent Australian research on human-animal interactions. The authors look at both past and present, then anticipate future challenges in building an effective network to expand this field of study in Australia. |
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Herrmann, E.; Call, J.; Hernandez-Lloreda, M.V.; Hare, B.; Tomasello, M. |
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Humans Have Evolved Specialized Skills of Social Cognition: The Cultural Intelligence Hypothesis |
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2007 |
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Science |
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Science |
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317 |
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5843 |
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1360-1366 |
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Humans have many cognitive skills not possessed by their nearest primate relatives. The cultural intelligence hypothesis argues that this is mainly due to a species-specific set of social-cognitive skills, emerging early in ontogeny, for participating and exchanging knowledge in cultural groups. We tested this hypothesis by giving a comprehensive battery of cognitive tests to large numbers of two of humans' closest primate relatives, chimpanzees and orangutans, as well as to 2.5-year-old human children before literacy and schooling. Supporting the cultural intelligence hypothesis and contradicting the hypothesis that humans simply have more “general intelligence,” we found that the children and chimpanzees had very similar cognitive skills for dealing with the physical world but that the children had more sophisticated cognitive skills than either of the ape species for dealing with the social world. |
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4245 |
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