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Author |
Hare, B.; Rosati, A.; Kaminski, J.; Bräuer, J.; Call, J.; Tomasello, M. |
Title |
The domestication hypothesis for dogs' skills with human communication: a response to Udell et al. (2008) and Wynne et al. (2008) |
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Journal Article |
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2010 |
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Anim Behav |
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79 |
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Equine Behaviour @ team @ Hare2010 |
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6241 |
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Langbein, J.; Siebert, K.; Nuernberg, G. |
Title |
Concurrent recall of serially learned visual discrimination problems in dwarf goats (Capra hircus) |
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Journal Article |
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2008 |
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Behav Proc |
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Equine Behaviour @ team @ Langbein2008 |
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6363 |
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Author |
Kruska, D.C.T. |
Title |
Comparative quantitative investigations on brains of wild cavies (Cavia aperea) and guinea pigs (Cavia aperea f. porcellus). A contribution to size changes of CNS structures due to domestication |
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Journal Article |
Year |
2014 |
Publication |
Mammalian Biology – Zeitschrift für Säugetierkunde |
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Mamm Biol |
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79 |
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4 |
Pages |
230-239 |
Keywords |
Domestication; Allometry; Brain structure volumes; Brain-behavior correlation |
Abstract |
Intraspecific allometric calculations of the brain to body size relation revealed distinct differences between 127 (67; 60) ancestral wild cavies and 82 (37; 45) guinea pigs, their domesticated relatives. The dependency of both measures from one another remained the same in both animal groups but the brains of guinea pigs were by 14.22% smaller at any net body weight. Consistent with results in other species the domestication of Cavia aperea is also characterized by a decrease of brain size. Fresh tissue sizes of the five brain parts medulla oblongata, cerebellum, mesencephalon, diencephalon and telencephalon were determined for 6 cavies and 6 guinea pigs by the serial section method. Additionally the sizes of 16 endbrain structures and those of the optic tract, the lateral geniculate body and the cochlear nucleus were measured. Different decrease values resulted for all these structures concomitant with domestication as was calculated from the amount of total brain size decrease and average relative structure values in the wild as well as the domesticated brain. The size decrease of the entire telencephalon (-13.7%) was within the range of the mean overall reduction as similarly was the case for the total neocortex (-10.7%) whereas the total allocortex (-20.9%) clearly was more strongly affected. The size decrease of the olfactory bulb (-41.9%) was extreme and clearly higher than found for the secondary olfactory structures (around -11%). The primary nuclei of other sensory systems (vision, audition) were decreased to less extent (lateral geniculate: -18.1%; cochlear nucleus: -12.6%). Mass decreases of pure white matter parts were nearly twice as high in contrast to associated grey matter parts (neocortex white versus grey matter; tractus opticus versus lateral geniculate body). The relatively great decrease values found for the limbic structures hippocampus (-26.9%) and schizocortex (-25.9%) are especially notable since they are in good conformity with domestication effects in other mammalian species. The findings of this study are discussed with regard to results of similar investigations on wild and domesticated gerbils (Meriones unguiculatus), the encephalization of the wild form, the special and species-specific mode and duration of domestication and in connection with certain behavioral changes as resulted from comparative investigations in ethology, socio-biology, endocrinology and general physiology. |
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1616-5047 |
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Admin @ knut @ |
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6401 |
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Author |
Shettleworth, S.J. |
Title |
The evolution of comparative cognition: is the snark still a Boojum? |
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Journal Article |
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2009 |
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Behav Processes |
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80 |
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Equine Behaviour @ team @ Shettleworth2009 |
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6231 |
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Capitani, C.; Chynoweth, M.; Kusak, J.; Çoban, E.; Sekercioglu, Ç.H. |
Title |
Wolf diet in an agricultural landscape of north-eastern Turkey |
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Journal Article |
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2016 |
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Mammalia |
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Mammalia |
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80 |
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3 |
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329-334 |
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Mammalia |
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80 |
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3 |
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Equine Behaviour @ team @ |
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6687 |
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van de Waal, E.; Bshary, R. |
Title |
Social-learning abilities of wild vervet monkeys in a two-step task artificial fruit experiment |
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2011 |
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Anim Behav |
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81 |
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Equine Behaviour @ team @ van de Waal2011 |
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6262 |
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Author |
van de Waal, E.; Bshary, R. |
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Contact with human facilities appears to enhance technical skills in wild vervet monkeys (Chlorocebus aethiops) |
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2010 |
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Folia Primatol |
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81 |
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Equine Behaviour @ team @ van de Waal2010 |
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6265 |
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Author |
Squire, L. |
Title |
Memory systems of the brain: a brief history and current perspective |
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2004 |
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Neurobiol Learn Mem |
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Equine Behaviour @ team @ Squire2004 |
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6365 |
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Author |
Schneider, G.; Krueger, K. |
Title |
Third-party interventions keep social partners from exchanging affiliative interactions with others |
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Journal Article |
Year |
2012 |
Publication |
Animal Behaviour |
Abbreviated Journal |
Anim. Behav. |
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83 |
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2 |
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377-387 |
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Equus caballus; horse; rank; social bond; social network; third-party intervention |
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Third-party interventions are defined as the interruption of dyadic interactions by third animals through direct physical contact, interposing or threats. Previous studies focused on the analysis of interventions against agonistic encounters. However, there have been no evaluations of interventions against affiliative behaviours, particularly in relation to the intervening animal�s social relationships and its social and spatial position. Horses, Equus caballus, are an interesting model species, as interventions against affiliative interactions occur more frequently than against agonistic interactions. In this study, 64 feral horses displayed 67 interventions in affiliative interactions and eight interventions in agonistic interactions within the observation period. We analysed the interventions in affiliative encounters, and found that it was mainly higher-ranking females that intervened in the affiliative interactions of group mates in the stable horse harems. The intervening animals took an active part in affiliative and agonistic encounters within the group, but did not occupy particular social roles or spatial positions. They intervened in affiliative interactions in which group mates with which they had social bonds interacted with other members of the group. They targeted the nonbonded animal and approached the one with which they were socially bonded. We suggest some species use third-party interventions in affiliative interactions to prevent competition for preferred social interaction partners from escalating into more costly agonistic encounters. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5492 |
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Author |
Thornton, A.; Samson, J. |
Title |
Innovative problem solving in wild meerkats |
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2012 |
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Anim Behav |
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Equine Behaviour @ team @ Thornton2012 |
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6267 |
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