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Ferrero, D.M.; Moeller, L.M.; Osakada, T.; Horio, N.; Li, Q.; Roy, D.S.; Cichy, A.; Spehr, M.; Touhara, K.; Liberles, S.D. |
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Title |
A juvenile mouse pheromone inhibits sexual behaviour through the vomeronasal system |
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Journal Article |
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Year |
2013 |
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Abbreviated Journal |
Nature |
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Volume  |
502 |
Issue |
7471 |
Pages |
368-371 |
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Keywords |
Pheromone Olfactory receptors |
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Abstract |
Animals display a repertoire of different social behaviours. Appropriate behavioural responses depend on sensory input received during social interactions. In mice, social behaviour is driven by pheromones, chemical signals that encode information related to age, sex and physiological state1. However, although mice show different social behaviours towards adults, juveniles and neonates, sensory cues that enable specific recognition of juvenile mice are unknown. Here we describe a juvenile pheromone produced by young mice before puberty, termed exocrine-gland secreting peptide 22 (ESP22). ESP22 is secreted from the lacrimal gland and released into tears of 2- to 3-week-old mice. Upon detection, ESP22 activates high-affinity sensory neurons in the vomeronasal organ, and downstream limbic neurons in the medial amygdala. Recombinant ESP22, painted on mice, exerts a powerful inhibitory effect on adult male mating behaviour, which is abolished in knockout mice lacking TRPC2, a key signalling component of the vomeronasal organ2, 3. Furthermore, knockout of TRPC2 or loss of ESP22 production results in increased sexual behaviour of adult males towards juveniles, and sexual responses towards ESP22-deficient juveniles are suppressed by ESP22 painting. Thus, we describe a pheromone of sexually immature mice that controls an innate social behaviour, a response pathway through the accessory olfactory system and a new role for vomeronasal organ signalling in inhibiting sexual behaviour towards young. These findings provide a molecular framework for understanding how a sensory system can regulate behaviour. |
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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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0028-0836 |
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Equine Behaviour @ team @ |
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5732 |
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Author |
Mann Janet; Patterson Eric M. |
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Title |
Tool use by aquatic animals |
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2013 |
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Philosophical Transactions of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Phil. Trans. Biol. Sci. |
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368 |
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1630 |
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20120424 |
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Royal Society |
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doi: 10.1098/rstb.2012.0424 |
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Equine Behaviour @ team @ |
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6579 |
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Author |
Pedersen, E.J.; Kurzban, R.; McCullough, M.E. |
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Title |
Do humans really punish altruistically? A closer look |
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Journal Article |
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Year |
2013 |
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Proceedings of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Proc. R. Soc. Lond. B |
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280 |
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1758 |
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Some researchers have proposed that natural selection has given rise in humans to one or more adaptations for altruistically punishing on behalf of other individuals who have been treated unfairly, even when the punisher has no chance of benefiting via reciprocity or benefits to kin. However, empirical support for the altruistic punishment hypothesis depends on results from experiments that are vulnerable to potentially important experimental artefacts. Here, we searched for evidence of altruistic punishment in an experiment that precluded these artefacts. In so doing, we found that victims of unfairness punished transgressors, whereas witnesses of unfairness did not. Furthermore, witnesses’ emotional reactions to unfairness were characterized by envy of the unfair individual's selfish gains rather than by moralistic anger towards the unfair behaviour. In a second experiment run independently in two separate samples, we found that previous evidence for altruistic punishment plausibly resulted from affective forecasting error—that is, limitations on humans’ abilities to accurately simulate how they would feel in hypothetical situations. Together, these findings suggest that the case for altruistic punishment in humans—a view that has gained increasing attention in the biological and social sciences—has been overstated. |
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Equine Behaviour @ team @ |
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5804 |
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Author |
Jankunis, E.S.; Whishaw, I.Q. |
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Title |
Sucrose Bobs and Quinine Gapes: Horse (Equus caballus) responses to taste support phylogenetic similarity in taste reactivity |
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Journal Article |
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Year |
2013 |
Publication |
Behavioural Brain Research |
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256 |
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284-290 |
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Hedonic; Aversive; Reactions; Taste; Reactivity; Horse |
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Evidence suggests that behavioural affective reactions to sweet and bitter substances are homologous in humans, nonhuman primates, and rodents. The sweet taste of sucrose elicits facial responses that include rhythmic tongue protrusions whereas the bitter taste of quinine elicits facial responses that include gapes, featuring an opening of the mouth and protrusion of the tongue. The present study using the horse (Equus caballus) was undertaken for three reasons: (1) there is debate about the presence of a sweet receptor gene in the horse, (2) there is a need to expand the examination of facial reactions to taste in lineages other than the closely related lineages of rodents and primates, and (3) the horse provides an opportunity to test the hypothesis that some social signals derive from movements related to taste reaction. The horses were given oral infusions of either sucrose or quinine and their behaviour was examined using frame-by-frame video analysis. Control groups were exposed received water or syringe insertion only. Amongst the many responses made to the infusions, the distinctive response to sucrose was a bob coupled with a slight tongue protrusion and forward movement of the ears; the distinctive response to quinine was a head extension and mouth gape accompanied by a large tongue protrusion and backward movement of the ears. Sucrose Bobs and Quinine Gapes are discussed with respect to: (1) the relevance of facial reactions to both sucrose and quinine to taste receptors in horses, (2) the similarity of features of taste expression in horses to those documented in rodents and primates, and (3) the dissimilarity between facial reactions to taste and other social signals displayed by horses. |
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0166-4328 |
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Equine Behaviour @ team @ |
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6635 |
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Author |
Calcagnoli, F.; Boer, S.F.; Althaus, M.; Boer, J.A.; Koolhaas, J.M. |
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Title |
Antiaggressive activity of central oxytocin in male rats |
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Journal Article |
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Year |
2013 |
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Abbreviated Journal |
Psychopharmacology |
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Volume |
229 |
Issue |
4 |
Pages |
639-651 |
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Keywords |
Oxytocin; Offensive aggression; Social exploration; Individual variability |
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Abstract |
Rationale A substantial body of research suggests that the
neuropeptide oxytocin promotes social affiliative behaviors
in a wide range of animals including humans. However, its
antiaggressive action has not been unequivocally demonstrated
in male laboratory rodents.
Objective Our primary goal was to examine the putative
serenic effect of oxytocin in a feral strain (wild type
Groningen, WTG) of rats that generally show a much
broader variation and higher levels of intermale aggression
than commonly used laboratory strains of rats.
Methods Resident animals were intracerebroventricularly
(icv) administered with different doses of synthetic oxytocin
and oxytocin receptor antagonist, alone and in combination,
in order to manipulate brain oxytocin functioning and to
assess their behavioral response to an intruder.
Results Our data clearly demonstrate that acute icv administered
oxytocin produces dose-dependent and receptorselective
changes in social behavior, reducing aggression
and potentiating social exploration. These antiaggressive
effects are stronger in the more offensive rats. On the other
hand, administration of an oxytocin receptor antagonist
tends to increase (nonsignificantly) aggression only in
low–medium aggressive animals.
Conclusions These results suggest that transiently enhancing
brain oxytocin function has potent antiaggressive effects,
whereas its attenuation tends to enhance aggressiveness. In
addition, a possible inverse relationship between trait aggression
and endogenous oxytocinergic signaling is revealed.
Overall, this study emphasizes the importance of brain
oxytocinergic signaling for regulating intermale offensive aggression.
This study supports the suggestion that oxytocin
receptor agonists could clinically be useful for curbing heightened
aggression seen in a range of neuropsychiatric disorders
like antisocial personality disorder, autism, and addiction. |
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Springer Berlin Heidelberg |
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English |
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0033-3158 |
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Equine Behaviour @ team @ |
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5723 |
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Waldern, N.M.; Wiestner, T.; Ramseier, L.C.; Amport, C.; Weishaupt, M.A. |
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Effects of shoeing on limb movement and ground reaction forces in Icelandic horses at walk, tölt and trot |
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Year |
2013 |
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The Veterinary Journal |
Abbreviated Journal |
Vet. J. |
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198, Supplement 1 |
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e103-e108 |
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Icelandic horse; Gait analysis; Ground reaction force; Kinematics; Shoeing; Tölt |
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Abstract Tölt is a symmetric four-beat gait with a speed range extending into that of trot and canter. Specific shoeing methods, such as unnaturally high and long hooves, are used to enforce individual gait predisposition. The aim of this study was to assess the consequences of this shoeing style on loading and movement of the limbs at walk, tölt and trot, and at different velocities. Simultaneous kinetic and kinematic gait analysis was carried out at walk (1.4 m/s) and at two tölting and trotting speeds (3.3 m/s and 3.9 m/s) on an instrumented treadmill. Thirteen sound Icelandic horses were first measured with high, long front hooves (SH) and, 1 week later, after trimming the hooves according to standard shoeing principles (SN). Comparing SH with SN, front hooves had 21 ± 5 mm longer dorsal hoof walls, and the shoeing material per hoof was 273 ± 50 g heavier. In all three gaits, gait quality, as it is currently judged, was improved with SH due to a lower stride rate, a longer stride length and a higher, but not wider, forelimb protraction arc, which were also positively associated with speed. Forelimb–hind limb balance remained unchanged, but limb impulses were higher. Apart from an increase of ⩽2.2% in the forelimbs at the faster speed of both tölt and trot, SH had little influence on vertical peak forces. |
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1090-0233 |
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Equine Behaviour @ team @ |
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5912 |
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Yorke, J.; Nugent, W.; Strand, E.; Bolen, R.; New, J.; Davis, C. |
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Equine-assisted therapy and its impact on cortisol levels of children and horses: a pilot study and meta-analysis |
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2013 |
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Early Child Development and Care |
Abbreviated Journal |
Early Child Development and Care |
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183 |
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7 |
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874-894 |
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Childhood trauma, abuse or neglect impacts the function and structure of the brain of affected children. Attunement with other beings as well as an enriched environment can contribute to normal brain development. The enriched environment of a barn and attunement with an animal may contribute to reductions in stress for traumatised children. A pilot study, using a multiple base line, single case design included four children with post-traumatic stress syndrome (aged eight to ten years) and four therapy riding horses. This study hypothesised that cortisol would correlate between each child?horse pair, using a 12-day intervention that included six consecutive days of riding and grooming. A meta-analysis was completed of correlation levels of four child?horse pairs The weighted mean cross-correlation, controlling for autocorrelation, was 0.23, Z?=?3.03, approximate 95% confidence interval 0.23?±?(1.96???0.076) or 0.08 to 0.38. The data suggest a need for further research. |
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Routledge |
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0300-4430 |
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doi: 10.1080/03004430.2012.693486 |
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Equine Behaviour @ team @ |
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6034 |
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Figueroa, J.; Solà-Oriol, D.; Manteca, X.; Pérez, J.F. |
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Social learning of feeding behaviour in pigs: Effects of neophobia and familiarity with the demonstrator conspecific |
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Journal Article |
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2013 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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148 |
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1 |
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120-127 |
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Social interactions facilitate animals learning of new features of their environment minimizing a trial and error process. It has been observed in some species that food cues can be acquired by one individual (the observer) from an animal model (demonstrator) due to social learning. Three experiments were performed to evaluate whether weaned piglets may show a preference for a flavoured feed following brief social interactions (30min) with an experienced demonstrator. After the social interaction between demonstrator and observer pigs, a 30-min choice test between the flavoured feed previously eaten by demonstrators (DEM-feed) and other flavoured feed (OTH-feed; Exp. 1 and 2) or a known unflavoured starter diet (Exp. 3) was performed with observer animals. Greater intake of DEM-feed occurred when demonstrators and observers were from the same pen (Exp. 1) or from the same litter (Exp. 2), but not when observers and demonstrators were unfamiliar with each other (Exp. 1). Observers also preferred flavours previously eaten by the demonstrator over their unflavoured diet already known. Social interactions with a conspecific pig that had a recent experience with a flavoured feed enhanced the preference for that feed and could even override neophobia to a new feed. The familiarity of conspecific demonstrators plays a key role in social learning of new feed cues probably due to selective exploration involving closer snout-to-snout contacts with kin conspecifics. |
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Elsevier |
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0168-1591 |
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doi: 10.1016/j.applanim.2013.06.002 |
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Equine Behaviour @ team @ |
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6038 |
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Briefer, E.F.; McElligott, A.G. |
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Rescued goats at a sanctuary display positive mood after former neglect |
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Journal Article |
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2013 |
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Appl Anim Behav Sci |
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146 |
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Equine Behaviour @ team @ Briefer2013 |
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6287 |
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Murray, L.M.A.; Byrne, K.; D’Eath, R.B. |
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Pair-bonding and companion recognition in domestic donkeys, <em>Equus asinus</em> |
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Journal Article |
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2013 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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143 |
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1 |
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67-74 |
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Pair and social bonding has been documented in various taxa, where pair formations are often described as being driven by kinship or sexual motivation. However, pair-bonding between unrelated individuals where sexual motivation is not a factor is not well documented. Many social relationships and pair-bonds between members of a dyad are facilitated by each individual's ability to recognise their partner using cues which are characteristic of that particular individual. The aims of this study were i) to investigate the existence of pair-bonding in domestic donkeys and ii) to determine whether members of a dyad could recognise their companion during a Y-maze recognition test. Subjects were 55 unrelated donkeys (38 gelded males, 15 females) in seven groups of mixed or same sex, comprising 4?14 individuals. Spatial proximity (nearest-neighbour) was observed three times a day over a 22-day period. Using a simulation approach based on observed data to generate randomised nearest-neighbour matrices, the statistical significance of social relationships was estimated. Of these, 42 (79.2%) were involved in significantly (p<0.05) non-random nearest-neighbour relationships, most of which were reciprocal pair relationships. Based on the spatial data, 24 of the donkeys which had shown significant reciprocal nearest-neighbour preferences for one individual (companion) were then used in a Y-maze recognition test in which they were presented with a choice of their companion and either a familiar donkey from the same group or an unfamiliar donkey from a different group. Donkeys? spatial location in the Y-maze demonstrated a preference for their companion versus familiar (one sample Wilcoxon signed rank test, W=239, p=0.002) or unfamiliar donkeys (W=222, p=0.041). These results verify anecdotal evidence from donkey handlers that donkeys often form pair-bonds, and show that reciprocal social preference and recognition are the basis of these. Pair-bond formation and companionship among donkeys have potential implications for their management, husbandry and welfare. |
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Elsevier |
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0168-1591 |
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doi: 10.1016/j.applanim.2012.11.005 |
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Equine Behaviour @ team @ |
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6149 |
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