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| Author |
Gruber, T.; Clay, Z.; Zuberbühler, K. |
| Title |
A comparison of bonobo and chimpanzee tool use: evidence for a female bias in the Pan lineage |
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Journal Article |
| Year |
2010 |
Publication |
Animal Behaviour |
Abbreviated Journal |
Anim. Behav. |
| Volume |
80 |
Issue |
6 |
Pages |
1023-1033 |
| Keywords |
culture; great ape; neoteny; Pan; primate evolution; sex difference; tool use |
Abstract  |
Chimpanzees, Pan troglodytes, are the most sophisticated tool-users among all nonhuman primates. From an evolutionary perspective, it is therefore puzzling that the tool use behaviour of their closest living primate relative, the bonobo, Pan paniscus, has been described as particularly poor. However, only a small number of bonobo groups have been studied in the wild and only over comparably short periods. Here, we show that captive bonobos and chimpanzees are equally diverse tool-users in most contexts. Our observations illustrate that tool use in bonobos can be highly complex and no different from what has been described for chimpanzees. The only major difference in the chimpanzee and bonobo data was that bonobos of all age–sex classes used tools in a play context, a possible manifestation of their neotenous nature. We also found that female bonobos displayed a larger range of tool use behaviours than males, a pattern previously described for chimpanzees but not for other great apes. Our results are consistent with the hypothesis that the female-biased tool use evolved prior to the split between bonobos and chimpanzees. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5856 |
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Smith, J.E.; Van Horn, R.C.; Powning, K.S.; Cole, A.R.; Graham, K.E.; Memenis, S.K.; Holekamp, K.E. |
| Title |
Evolutionary forces favoring intragroup coalitions among spotted hyenas and other animals |
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Journal Article |
| Year |
2010 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
| Volume |
21 |
Issue |
2 |
Pages |
284-303 |
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| Abstract |
Coalitionary support in agonistic interactions represents cooperation because intervening in a fight is potentially costly to the donor of support but benefits the recipient. Here, we first review the characteristics of, and evolutionary forces favoring, intragroup coalitions in 49 species and find that patterns of intragroup coalition formation are remarkably similar between primates and nonprimates. We then test hypotheses suggesting kin selection, reciprocal altruism, and direct benefits as adaptive explanations for coalitionary interventions among adult female spotted hyenas (Crocuta crocuta) belonging to a large social group in Kenya. As predicted by kin selection theory, females supported close kin most often, and the density (connectedness) of cooperation networks increased with genetic relatedness. Nevertheless, kinship failed to protect females from coalitionary attacks. We found no evidence of enduring alliances based on reciprocal support among unrelated adult females. Instead, donors generally minimized costs to themselves, intervening most often during low-intensity fights and when feeding opportunities were unavailable. Females also gained direct benefits from directing coalitionary attacks toward subordinates. Finally, females monitored the number of dominant bystanders in the “audience” at fights and modified their level of cooperation based on this knowledge. Overall, hyenas made flexible decisions regarding whether or not to intervene in fights, modifying their tendency to cooperate based on multiple types of information about their immediate social and ecological environments. Taken together, these findings indicate that the combined evolutionary forces of kin selection and direct benefits derived from reinforcing the status quo drive coalitionary interventions among adult female spotted hyenas. |
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agonistic support, audience effect, cooperation network, direct benefits, kin selection * reciprocal altruism * review |
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10.1093/beheco/arp181 |
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Equine Behaviour @ team @ |
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5285 |
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Bonanni, R.; Cafazzo, S.; Valsecchi, P.; Natoli, E. |
| Title |
Effect of affiliative and agonistic relationships on leadership behaviour in free-ranging dogs |
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Journal Article |
| Year |
2010 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
79 |
Issue |
5 |
Pages |
981-991 |
| Keywords |
affiliative relationship; agonistic dominance; Canis lupus familiaris; consensus costs; consensus decisions; domestic dog; formal dominance; individual variation in leadership |
| Abstract |
Consensus decisions about the nature and timing of group activities allow animals to maintain group cohesiveness, but also entail costs because individuals often differ with respect to their optimal activity budgets. Two mechanisms whereby animals reach a consensus include ‘consistent leadership’, in which a single dominant individual makes the decision, and ‘variable leadership’ in which several group members contribute to the decision outcome. Sharing of consensus decisions is expected to reduce consensus costs to most group members. Both patterns are thought to emerge from the complexity of social relationships of group members. We investigated the distribution of leadership during group departures in two packs of free-ranging dogs, Canis lupus familiaris, and tested how its distribution between individuals was affected by dominance rank-related affiliative and agonistic relationships. Although leadership was not entirely concentrated on a single group member, both packs had a limited number of habitual leaders. In the largest pack, the pattern of leadership changed from ‘variable’ to nearly ‘consistent’ after its size had shrunk. Habitual leaders were usually old and high-ranking individuals. However, high-ranking dogs that received affiliative submissions in greeting ceremonies were more likely to lead than dominant dogs receiving submissions only in agonistic contexts. During resting times, habitual followers associated more closely with habitual leaders than with other followers. These results suggest that in social species collective movements may arise from the effort of subordinates to maintain close proximity with specific valuable social partners. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5177 |
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Gehring, T.M.; VerCauteren, K.C.; Provost, M.L.; Cellar, A.C. |
| Title |
Utility of livestock-protection dogs for deterring wildlife from cattle farms |
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Journal Article |
| Year |
2010 |
Publication |
Wildl. Res. |
Abbreviated Journal |
Wildl. Res. |
| Volume |
37 |
Issue |
8 |
Pages |
715-721 |
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bovine tuberculosis, coyote, grey wolf, livestock protection dog, mesopredators, white-tailed deer, wildlife damage management. |
| Abstract |
Context. Livestock producers worldwide are negatively affected by livestock losses because of predators and wildlife-transmitted diseases. In the western Great Lakes Region of the United States, this conflict has increased as grey wolf (Canis lupus) populations have recovered and white-tailed deer (Odocoileus virginianus) have served as a wildlife reservoir for bovine tuberculosis (Myobacterium bovis).Aims. We conducted field experiments on cattle farms to evaluate the effectiveness of livestock-protection dogs (LPDs) for excluding wolves, coyotes (C. latrans), white-tailed deer and mesopredators from livestock pastures.Methods. We integrated LPDs on six cattle farms (treatment) and monitored wildlife use with tracking swaths on these farms, concurrent with three control cattle farms during 2005-2008. The amount of time deer spent in livestock pastures was recorded using direct observation.Key results. Livestock pastures protected by LPDs had reduced use by these wildlife compared with control pastures not protected by LPDs. White-tailed deer spent less time in livestock pastures protected by LPDs compared with control pastures not protected by LPDs.Conclusions. Our research supports the theory that LPDs can be an effective management tool for reducing predation and disease transmission. We also demonstrate that LPDs are not limited to being used only with sheep and goats; they can also be used to protect cattle.Implications. On the basis of our findings, we support the use of LPDs as a proactive management tool that producers can implement to minimise the threat of livestock depredations and transmission of disease from wildlife to livestock. LPDs should be investigated further as a more general conservation tool for protecting valuable wildlife, such as ground-nesting birds, that use livestock pastures and are affected by predators that use these pastures. |
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no |
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Equine Behaviour @ team @ |
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6575 |
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Huffman, M.; Spiezio, C.; Sgaravatti, A.; Leca, J.-B. |
| Title |
Leaf swallowing behavior in chimpanzees (Pan troglodytes): biased learning and the emergence of group level cultural differences |
Type |
Journal Article |
| Year |
2010 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
13 |
Issue |
6 |
Pages |
871-880-880 |
| Keywords |
Biomedical and Life Sciences |
| Abstract |
Demonstrating the ability to ‘copy’ the behavior of others is an important aspect in determining whether social learning occurs and whether group level differences in a given behavior represent cultural differences or not. Understanding the occurrence of this process in its natural context is essential, but can be a daunting task in the wild. In order to test the social learning hypothesis for the acquisition of leaf swallowing (LS), a self-medicative behavior associated with the expulsion of parasites, we conducted semi-naturalistic experiments on two captive groups of parasite-free, naïve chimpanzees (Pan troglodytes). Individuals in the group were systematically provided appropriate stimuli (rough hispid leaves) identical to those used by chimpanzees in the wild. Individuals initially responded in a variety of ways, ranging from total aversion to normal chewing and swallowing. Over time, however, the two groups adopted different variants for inserting and folding the leaves in the mouth prior to swallowing them (complete and partial LS), following the specific method spontaneously displayed by the first and primary LS models in their respective groups. These variants were similar to LS displayed by chimpanzees in the wild. Using the option-bias method, we found evidence for social learning leading to group-level biased transmission and group-level stabilization of these two variants. This is the first report on two distinct cultural variants innovated in response to the introduction of natural stimuli that emerged and spread spontaneously and concurrently within two adjacent groups of socially housed primates. These observations support the assertion that LS may reflect a generalized propensity for ingesting rough hispid leaves, which can be socially induced and transmitted within a group. Ingesting an adequate number of these leaves induces increased gut motility, which is responsible for the subsequent expulsion of particular parasite species in the wild. Cultural transmission and maintenance of LS within a group and associative learning by the individual of the positive consequences of this otherwise non-nutritive mode of ingestion is proposed to be the pivotal link between this feeding propensity and its maintenance as a self-medicative behavior by great apes in the wild. |
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Springer Berlin / Heidelberg |
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1435-9448 |
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no |
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Equine Behaviour @ team @ |
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5277 |
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Lemasson, A.; Koda, H.; Kato, A.; Oyakawa, C.; Blois-Heulin, C.; Masataka, N. |
| Title |
Influence of sound specificity and familiarity on Japanese macaques' (Macaca fuscata) auditory laterality |
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Journal Article |
| Year |
2010 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
| Volume |
208 |
Issue |
1 |
Pages |
286-289 |
| Keywords |
Auditory processing; Hemispheric specialisation; Specificity; Familiarity; Head-turn paradigm; Macaque |
| Abstract |
Despite attempts to generalise the left hemisphere-speech association of humans to animal communication, the debate remains open. More studies on primates are needed to explore the potential effects of sound specificity and familiarity. Familiar and non-familiar nonhuman primate contact calls, bird calls and non-biological sounds were broadcast to Japanese macaques. Macaques turned their heads preferentially towards the left (right hemisphere) when hearing conspecific or familiar primates supporting hemispheric specialisation. Our results support the role of experience in brain organisation and the importance of social factors to understand laterality evolution. |
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0166-4328 |
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no |
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Equine Behaviour @ team @ |
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5081 |
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Bentley-Condit, V.; Smith, E.O. |
| Title |
Animal tool use: current definitions and an updated comprehensive catalog |
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Journal Article |
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2010 |
Publication |
Behaviour |
Abbreviated Journal |
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147 |
Issue |
2 |
Pages |
185-32 |
| Keywords |
TOOL USE; CATALOG; ANIMAL |
| Abstract |
Despite numerous attempts to define animal tool use over the past four decades, the definition remains elusive and the behaviour classification somewhat subjective. Here, we provide a brief review of the definitions of animal tool use and show how those definitions have been modified over time. While some aspects have remained constant (i.e., the distinction between 'true' and 'borderline' tool use), others have been added (i.e., the distinction between 'dynamic' and 'static' behaviours). We present an updated, comprehensive catalog of documented animal tool use that indicates whether the behaviours observed included any 'true' tool use, whether the observations were limited to captive animals, whether tool manufacture has been observed, and whether the observed tool use was limited to only one individual and, thus, 'anecdotal' (i.e., N = 1). Such a catalog has not been attempted since Beck (1980). In addition to being a useful reference for behaviourists, this catalog demonstrates broad tool use and manufacture trends that may be of interest to phylogenists, evolutionary ecologists, and cognitive evolutionists. Tool use and tool manufacture are shown to be widespread across three phyla and seven classes of the animal kingdom. Moreover, there is complete overlap between the Aves and Mammalia orders in terms of the tool use categories (e.g., food extraction, food capture, agonism) arguing against any special abilities of mammals. The majority of tool users, almost 85% of the entries, use tools in only one of the tool use categories. Only members of the Passeriformes and Primates orders have been observed to use tools in four or more of the ten categories. Thus, observed tool use by some members of these two orders (e.g., Corvus, Papio) is qualitatively different from that of all other animal taxa. Finally, although there are similarities between Aves and Mammalia, and Primates and Passeriformes, primate tool use is qualitatively different. Approximately 35% of the entries for this order demonstrate a breadth of tool use (i.e., three or more categories by any one species) compared to other mammals (0%), Aves (2.4%), and the Passeriformes (3.1%). This greater breadth in tool use by some organisms may involve phylogenetic or cognitive differences � or may simply reflect differences in length and intensity of observations. The impact that tool usage may have had on groups' respective ecological niches and, through niche-construction, on their respective evolutionary trajectories remains a subject for future study. |
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Equine Behaviour @ team @ :/content/journals/10.1163/000579509x12512865686555 |
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5859 |
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Siniscalchi, M.; Sasso, R.; Pepe, A.M.; Vallortigara, G.; Quaranta, A. |
| Title |
Dogs turn left to emotional stimuli |
Type |
Journal Article |
| Year |
2010 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
| Volume |
208 |
Issue |
2 |
Pages |
516-521 |
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Dog; Laterality; Vision; Behaviour; Physiology; Cognition; Emotion; Animal welfare |
| Abstract |
During feeding behaviour, dogs were suddenly presented with 2D stimuli depicting the silhouette of a dog, a cat or a snake simultaneously into the left and right visual hemifields. A bias to turn the head towards the left rather than the right side was observed with the cat and snake stimulus but not with the dog stimulus. Latencies to react following stimulus presentation were lower for left than for right head turning, whereas times needed to resume feeding behaviour were higher after left rather than after right head turning. When stimuli were presented only to the left or right visual hemifields, dogs proved to be more responsive to left side presentation, irrespective of the type of stimulus. However, cat and snake stimuli produced shorter latencies to react and longer times to resume feeding following left rather than right monocular visual hemifield presentation. Results demonstrate striking lateralization in dogs, with the right side of the brain more responsive to threatening and alarming stimuli. Possible implications for animal welfare are discussed. |
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0166-4328 |
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Equine Behaviour @ team @ |
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5080 |
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Lachapelle, S.; Healey, J. |
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On Hans, Zou and the others: wonder animals and the question of animal intelligence in early twentieth-century France |
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Journal Article |
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2010 |
Publication |
Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences |
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41 |
Issue |
1 |
Pages |
12-20 |
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Animal experimentation; Animal intelligence; Clever Hans; Comparative psychology; Psychical research; Wonder animals |
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During the second half of the nineteenth century, the advent of widespread pet ownership was accompanied by claims of heightened animal abilities. Psychical researchers investigated many of these claims, including animal telepathy and ghostly apparitions. By the beginning of the twentieth century, news of horses and dogs with the ability to read and calculate fascinated the French public and scientists alike. Amidst questions about the justification of animal cruelty in laboratory experiments, wonder animals came to represent some extraordinary possibilities associated with their kind. Psychologists speculated on the feats of wonder animals. They considered the possibility that these animals shared consciousness and intelligence with humans, and that--if confirmed--their alleged amazing abilities could lead to a new understanding of cognition for all animals. This article focuses on the few years during which claims of wonder animals occupied a significant place in French psychology and psychical research. It argues that as explanations involving deception or unconscious cues gained increased acceptance, the interest in wonder animals soon led to a backlash in comparative psychology that had repercussions for all animals, particularly those used in experimentation, in that it contributed to the decline of research addressing cognitive abilities in non-human species. |
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1369-8486 |
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Equine Behaviour @ team @ |
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5079 |
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Siniscalchi, M.; Sasso, R.; Pepe, A.M.; Dimatteo, S.; Vallortigara, G.; Quaranta, A. |
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Catecholamine plasma levels following immune stimulation with rabies vaccine in dogs selected for their paw preferences |
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Journal Article |
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2010 |
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Neuroscience Letters |
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476 |
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3 |
Pages |
142-145 |
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Physiology; Behavior; Lateralization; Catecholamines; Paw preference; Neuro-immune-modulation |
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Epinephrine and norepinephrine plasma levels were assessed in dogs in relation to paw preference following an immune challenge with rabies vaccine. The results showed that both catecholamines increased after the vaccine administration, confirming the main role of the sympathetic nervous system in the modulation activity between the brain and the immune system. Moreover, ambidextrous dogs showed a significantly higher increase of epinephrine levels 8 days after immunization with respect to right- and left-pawed dogs, suggesting that the biological activity of this molecule could be key for a different immune response with regard to laterality. |
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0304-3940 |
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Equine Behaviour @ team @ |
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5788 |
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