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Zeder, M.A. |
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Title |
Pathways to animal domestication |
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2011 |
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Harlan II: Biodiversity in Agriculture: Domestication, Evolution, and Sustainability |
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University of California |
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Davis |
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Damania, A.; Gepts, P. |
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Equine Behaviour @ team @ Zeder2011 |
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6316 |
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Author |
Stenglein, J.L.; Waits, L.P.; Ausband, D.E.; Zager, P.; Mack, C.M. |
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Estimating gray wolf pack size and family relationships using non invasive genetic sampling at rendezvous sites |
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2011 |
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J Mammal |
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92 |
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Equine Behaviour @ team @ Stenglein2011 |
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6476 |
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Core Development Team, R. |
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Title |
R: a language and environment for statistical computing |
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2011 |
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R foundation for statistical computing |
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Vienna, Austria |
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Equine Behaviour @ team @ Core Development Team2011 |
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6489 |
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Marescot, L.; Pradel, R.; Duchamp, C.; Cubaynes, S.; Mrboutin, E.; Choquet, R. |
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Title |
Capture – recapture population growth rate as a robust tool against detection heterogeneity for population management |
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2011 |
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Ecol Appl |
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21 |
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Equine Behaviour @ team @ Marescot2011 |
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6491 |
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Morgan, T.W.; Elliott, C.L. |
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Comparison of remotely-triggered cameras vs. howling surveys for estimating coyote (Canis latrans) Abundance in central Kentucky |
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Journal Article |
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2011 |
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J Ky Acad Science |
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72 |
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Equine Behaviour @ team @ Morgan2011 |
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6492 |
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Wasser, S.K.; Keim, J.L.; Taper, M.L.; Lele, S.R. |
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Title |
The influences of wolf predation, habitat loss, and human activity on caribou and moose in the Alberta oil sands |
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Journal Article |
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2011 |
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Frontiers in Ecology and the Environment |
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Frontiers in Ecology and the Environment |
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Woodland caribou (Rangifer tarandus caribou) and moose (Alces alces) populations in the Alberta oil sands region of western Canada are influenced by wolf (Canis lupus) predation, habitat degradation and loss, and anthropogenic activities. Trained domestic dogs were used to locate scat from caribou, moose, and wolves during winter surges in petroleum development. Evidence obtained from collected scat was then used to estimate resource selection, measure physiological stress, and provide individual genetic identification for precise mark–recapture abundance estimates of caribou, moose, and wolves. Strong impacts of human activity were indicated by changes in resource selection and in stress and nutrition hormone levels as human-use measures were added to base resource selection models (including ecological variables, provincial highways, and pre-existing linear features with no human activity) for caribou. Wolf predation and resource selection so heavily targeted deer (Odocoileus virginiana or O hemionus) that wolves appeared drawn away from prime caribou habitat. None of the three examined species showed a significant population change over 4 years. However, caribou population estimates were more than double those of previous approximations for this area. Our findings suggest that modifying landscape-level human-use patterns may be more effective at managing this ecosystem than intentional removal of wolves. |
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Ecological Society of America |
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1540-9295 |
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doi: 10.1890/100071 |
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Equine Behaviour @ team @ |
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5397 |
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Author |
Stuber, G.D.; Sparta, D.R.; Stamatakis, A.M.; van Leeuwen, W.A.; Hardjoprajitno, J.E.; Cho, S.; Tye, K.M.; Kempadoo, K.A.; Zhang, F.; Deisseroth, K.; Bonci, A. |
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Title |
Excitatory transmission from the amygdala to nucleus accumbens facilitates reward seeking |
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Journal Article |
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Year |
2011 |
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Nature |
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advance online publication |
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The basolateral amygdala (BLA) has a crucial role in emotional learning irrespective of valence1, 2, 3, 4, 5, 21, 22, 23. The BLA projection to the nucleus accumbens (NAc) is thought to modulate cue-triggered motivated behaviours4, 6, 7, 24, 25, but our understanding of the interaction between these two brain regions has been limited by the inability to manipulate neural-circuit elements of this pathway selectively during behaviour. To circumvent this limitation, we used in vivo optogenetic stimulation or inhibition of glutamatergic fibres from the BLA to the NAc, coupled with intracranial pharmacology and ex vivo electrophysiology. Here we show that optical stimulation of the pathway from the BLA to the NAc in mice reinforces behavioural responding to earn additional optical stimulation of these synaptic inputs. Optical stimulation of these glutamatergic fibres required intra-NAc dopamine D1-type receptor signalling, but not D2-type receptor signalling. Brief optical inhibition of fibres from the BLA to the NAc reduced cue-evoked intake of sucrose, demonstrating an important role of this specific pathway in controlling naturally occurring reward-related behaviour. Moreover, although optical stimulation of glutamatergic fibres from the medial prefrontal cortex to the NAc also elicited reliable excitatory synaptic responses, optical self-stimulation behaviour was not observed by activation of this pathway. These data indicate that whereas the BLA is important for processing both positive and negative affect, the glutamatergic pathway from the BLA to the NAc, in conjunction with dopamine signalling in the NAc, promotes motivated behavioural responding. Thus, optogenetic manipulation of anatomically distinct synaptic inputs to the NAc reveals functionally distinct properties of these inputs in controlling reward-seeking behaviours. |
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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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1476-4687 |
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10.1038/nature10194 |
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Equine Behaviour @ team @ |
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5398 |
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McFarland, R.; Majolo, B. |
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Reconciliation and the Costs of Aggression in Wild Barbary Macaques (Macaca sylvanus): A Test of the Integrated Hypothesis |
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Journal Article |
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2011 |
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Ethology |
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no-no |
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The ‘integrated hypothesis’ predicts that reconciliation (the post-conflict friendly interaction between former opponents observed in various group-living species) functions to reduce anxiety and the risk of aggression from the former opponent or a bystander in the aftermath of a conflict. It also predicts that relationship quality between opponents affects the occurrence of reconciliation and modulates the anxious response of the opponents after a conflict. Because of the asymmetric nature of aggressive interactions, the cost of aggression is likely to differ between the victim and the aggressor. The aim of this study was to test the predictions of the ‘integrated hypothesis’ independently for the victim and the aggressor of a conflict. We collected data on two wild groups of Barbary macaques. This study represents, to our knowledge, the first systematic test of the integrated hypothesis on wild, non-provisioned animals. Victims of aggression were at a greater risk of receiving aggression from the former opponent or a bystander after a conflict and showed elevated anxiety. We found no such costs for the aggressor. Reconciliation reduced anxiety in the victim but did not reduce their risk of receiving aggression. Finally, relationship quality affected the occurrence of reconciliation but did not modulate post-conflict anxiety. The results of our study show that the costs of aggression are asymmetrically distributed between the victim and the aggressor. Such differences are likely to lead to different social tactics used by the victim and the aggressor in the aftermath of a conflict. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5416 |
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Author |
Ramsden, S.; Richardson, F.M.; Josse, G.; Thomas, M.S.C.; Ellis, C.; Shakeshaft, C.; Seghier, M.L.; Price, C.J. |
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Verbal and non-verbal intelligence changes in the teenage brain |
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Journal Article |
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2011 |
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Nature |
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advance online publication |
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Intelligence quotient (IQ) is a standardized measure of human intellectual capacity that takes into account a wide range of cognitive skills1. IQ is generally considered to be stable across the lifespan, with scores at one time point used to predict educational achievement and employment prospects in later years1. Neuroimaging allows us to test whether unexpected longitudinal fluctuations in measured IQ are related to brain development. Here we show that verbal and non-verbal IQ can rise or fall in the teenage years, with these changes in performance validated by their close correlation with changes in local brain structure. A combination of structural and functional imaging showed that verbal IQ changed with grey matter in a region that was activated by speech, whereas non-verbal IQ changed with grey matter in a region that was activated by finger movements. By using longitudinal assessments of the same individuals, we obviated the many sources of variation in brain structure that confound cross-sectional studies. This allowed us to dissociate neural markers for the two types of IQ and to show that general verbal and non-verbal abilities are closely linked to the sensorimotor skills involved in learning. More generally, our results emphasize the possibility that an individual’s intellectual capacity relative to their peers can decrease or increase in the teenage years. This would be encouraging to those whose intellectual potential may improve, and would be a warning that early achievers may not maintain their potential. |
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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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1476-4687 |
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10.1038/nature10514 |
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Equine Behaviour @ team @ |
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5422 |
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Author |
Pays, O.; Sirot, E.; Fritz, H. |
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Title |
Collective Vigilance in the Greater Kudu: Towards a Better Understanding of Synchronization Patterns |
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Journal Article |
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2011 |
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Ethology |
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no-no |
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Collective detection of predators is one of the main advantages of living in groups in prey species. However, the mechanisms linking individual and collective vigilance remain largely unknown. Here, we investigated individual and collective vigilance in a natural population of greater kudu (Tragelaphus strepsiceros), a gregarious ruminant living under high predation risk. Controlling for environmental, individual and group factors, we show that the proportion of time during which at least one individual was vigilant increased with group size, whereas individual investment in vigilance decreased. We also show that individuals tended to synchronize both vigilance and feeding activities. More generally, and whatever the considered group size, we demonstrate how the independent scanning assumption underestimated both the proportion of time during which no individual was vigilant and the proportion of time during which all individuals were simultaneously vigilant, but overestimated the proportion of time during which one vigilant individual only was present. Our results thus contrast with the point of view that the alternative to independent vigilance is coordinated vigilance and plead for a better description of the processes whereby reciprocal influences between individuals shape collective patterns of vigilance. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5425 |
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