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Pérez-Barbería, F.J.; Shultz, S.; Dunbar, R.I. |
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Evidence for coevolution of sociality and relative brain size in three orders of mammals |
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2007 |
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Evolution |
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61 |
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Equine Behaviour @ team @ Pérez-Barbería2007 |
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6221 |
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Penn, D.C.; Povinelli, D.J. |
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Title |
Causal Cognition in Human and Nonhuman Animals: A Comparative, Critical Review |
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2007 |
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Annual Review of Psychology |
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58 |
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1 |
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97-118 |
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In this article, we review some of the most provocative experimental results to have emerged from comparative labs in the past few years, starting with research focusing on contingency learning and finishing with experiments exploring nonhuman animals' understanding of causal-logical relations. Although the theoretical explanation for these results is often inchoate, a clear pattern nevertheless emerges. The comparative evidence does not fit comfortably into either the traditional associationist or inferential alternatives that have dominated comparative debate for many decades now. Indeed, the similarities and differences between human and nonhuman causal cognition seem to be much more multifarious than these dichotomous alternatives allow. |
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Equine Behaviour @ team @ Penn2007 |
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2974 |
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Palacios, V.; Font, E.; Marquez, R. |
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Iberian wolf howls: acoustic structure, individual variation, and a comparison with North American populations |
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2007 |
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J Mammal |
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88 |
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Equine Behaviour @ team @ Palacios2007 |
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6469 |
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King, S.R.B.; Gurnell, J. |
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Scent-marking behaviour by stallions: an assessment of function in a reintroduced population of Przewalski horses (Equus ferus przewalskii) |
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2007 |
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Journal of Zoology |
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J Zool |
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272 |
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1 |
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30-36 |
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Abstract Scent marking is a common form of intraspecific communication in mammal species, and using faeces or urine is a cost-effective way of signalling competitive ability and resource holding power. Marking is ritually performed by male equids, and here we assess the function of male scent-marking behaviour in a recently introduced population of Przewalski horses Equus ferus przewalskii in Mongolia. Two forms of scent marking were observed: defecation on stud piles formed from repeated dunging in the same place, and overmarking of faeces and urine of mares. Stud piles were marked with dung by the harem holder and sniffed before and after dung was deposited. They were not found specifically at the periphery of harem ranges but occurred for the most part along routes used by the horses, and were more common in the core parts of harem ranges or where harem ranges overlapped. Thus, rather than being used to defend range boundaries, stud piles were placed predominantly where they would be encountered by male intruders. Mare excreta were covered with urine by the stallion, but were only sniffed before they were marked, not after. These marks appear to advertise to the mare and other, intruding stallions that the harem holder was the mare's consort and that the interloper should not risk trying to steal the mare or sneak a mating. Thus, the two forms of marking by harem holders appear to combine as first and second lines of defence of paternity rights in male intrasexual competition. |
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Equine Behaviour @ team @ King2007 |
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2315 |
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J. Keay-Bright, J.B. |
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The influence of land management on soil erosion in the Sneeuberg Mountains, Central Karoo, South Africa |
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2007 |
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Land Degradation & Development |
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18 |
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4 |
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423-439 |
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Farm practices in the Sneeuberg Mountains, Karoo, South Africa are examined to assess their contribution to the development of the observed gullies and badlands. Data from the literature is augmented by interviews with local farmers and measurements in the field. Changes in stocking rates, grazing systems and technological advances are assessed for their impact on soil erosion, vegetation cover and species composition. The possibility of natural and managed rehabilitation of badland areas is discussed, as are future prospects for farm management in the Sneeuberg. The findings suggest that high stock numbers and less benign management practices in the 19th century and the early 20th century underlie much of the degradation seen today. Copyright – 2007 John Wiley & Sons, Ltd. |
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1099-145x |
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Equine Behaviour @ team @ J.Keay-Bright2007 |
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3548 |
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Emery, N.J.; Clayton, N.S.; Frith, C.D. |
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Title |
Introduction. Social intelligence: from brain to culture |
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2007 |
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Philos Trans R Soc B |
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Philos Trans R Soc B |
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362 |
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Equine Behaviour @ team @ Emery2007 |
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6302 |
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Dugnol, B.; Fernández, C.; Galiano, G. |
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Wolf population counting by spectrogram image processing |
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2007 |
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Appl Math Comput |
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186 |
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Equine Behaviour @ team @ Dugnol2007 |
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6464 |
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Dugnol, B.; Fernández, C.; Galiano, G.; Velasco, J. |
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Implementation of a diffusive differential reassignment method for signal enhancement: An application to wolf population counting |
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2007 |
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Appl Math Comput |
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193 |
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Equine Behaviour @ team @ Dugnol2007 |
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6465 |
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Schino, G.; di Sorrentino, E.P.; Tiddi, B. |
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Grooming and coalitions in Japanese macaques (<em>Macaca fuscata</em>): Partner choice and the time frame reciprocation |
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2007 |
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Journal of Comparative Psychology |
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121 |
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181-188 |
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*Altruism; *Animal Grooming Behavior; *Animal Social Behavior; *Reciprocity; Monkeys |
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Evidence of a reciprocal exchange of grooming and agonistic support in primates is mixed. In this study, the authors analyzed a large database of grooming and coalitions in captive female Japanese macaques (Macaca fuscata) to investigate their within-group distribution and temporal relations. Macaques groomed preferentially those individuals that groomed them most and supported preferentially those individuals that supported them most. They also supported preferentially those individuals that groomed them most and groomed preferentially those individuals that supported them most. These results were not explained by covariation of grooming and support with third variables such as kinship, rank, or time spent in proximity. However, receiving grooming did not increase the short-term probability of supporting a partner, and being supported did not increase the short-term probability of grooming a partner. The proximate mechanisms underlying the exchange of services were discussed in relation to the time frame of the behavioral choices made by the monkeys. (PsycINFO Database Record (c) 2012 APA, all rights reserved) |
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Schino, Gabriele: Via Lucilio 36, Roma, Italy, 00136, gschino@casaccia.enea.it |
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American Psychological Association |
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Us |
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1939-2087(Electronic);0735-7036(Print) |
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Equine Behaviour @ team @ 2007-07076-007 |
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5810 |
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Vervaecke, H.; Stevens, J.; Vandemoortele, H.; Sigurjönsdöttir, H.; De Vries, H. |
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Aggression and dominance in matched groups of subadult Icelandic horses (Equus caballus) |
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2007 |
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Journal of Ethology |
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J. Ethol. |
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25 |
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3 |
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239-248 |
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Equus – Dominance – Aggression – Hierarchy – Steepness |
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Abstract We studied sex differences in the nature of aggression and dominance behaviour in two newly formed groups of 1-year-old Icelandic horses. One herd contained nine geldings, the other nine mares. The groups were matched with regard to dominance-determining traits such as age, weaning age, composition of native herd, social experience, genetic origin, body condition and maternal dominance status. High-ranking individuals of both sexes were more aggressive, high-ranking males were older, and high-ranking females had a better body condition. Frequencies of aggressions were similar in both groups. The mares reacted significantly more by showing submission upon an aggression rather than by not responding or by escalating the aggression. For the geldings, this difference was not observed due to a lower tendency to submit. A linear dominance hierarchy was found in both groups. David`s scores provided additional information regarding cardinal rank distances and were used to calculate steepness of hierarchies. The female hierarchy was somewhat steeper compared to the male hierarchy, suggesting somewhat lower despotism among males. This was mainly a consequence of the lower unidirectionality in male submission. Male contests occurred predominantly between dyads at top and mid positions, suggesting a low degree of acceptance of the hierarchy. |
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Equine Behaviour @ team @ |
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2192 |
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