| Records |
| Author |
Dreier, S.; van Zweden, J.S.; D'Ettorre, P. |
| Title |
Long-term memory of individual identity in ant queens |
Type |
Journal Article |
| Year |
2007 |
Publication |
Biology Letters |
Abbreviated Journal |
Biol Lett |
| Volume |
3 |
Issue  |
5 |
Pages |
459-462 |
| Keywords |
Aggression; Animals; Ants/*physiology; Conditioning, Operant; Evolution; Female; *Memory; *Recognition (Psychology); Social Dominance |
| Abstract |
Remembering individual identities is part of our own everyday social life. Surprisingly, this ability has recently been shown in two social insects. While paper wasps recognize each other individually through their facial markings, the ant, Pachycondyla villosa, uses chemical cues. In both species, individual recognition is adaptive since it facilitates the maintenance of stable dominance hierarchies among individuals, and thus reduces the cost of conflict within these small societies. Here, we investigated individual recognition in Pachycondyla ants by quantifying the level of aggression between pairs of familiar or unfamiliar queens over time. We show that unrelated founding queens of P. villosa and Pachycondyla inversa store information on the individual identity of other queens and can retrieve it from memory after 24h of separation. Thus, we have documented for the first time that long-term memory of individual identity is present and functional in ants. This novel finding represents an advance in our understanding of the mechanism determining the evolution of cooperation among unrelated individuals. |
| Address |
Institute of Biology, Department of Population Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen, Denmark. sdreier@bi.ku.dk |
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English |
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| ISSN |
1744-9561 |
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| Notes |
PMID:17594958 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4649 |
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| Author |
Clauss, M.; Castell, J.C.; Kienzle, E.; Schramel, P.; Dierenfeld, E.S.; Flach, E.J.; Behlert, O.; Streich, W.J.; Hummel, J.; Hatt, J.-M. |
| Title |
Mineral absorption in the black rhinoceros (Diceros bicornis) as compared with the domestic horse |
Type |
Journal Article |
| Year |
2007 |
Publication |
Journal of Animal Physiology and Animal Nutrition |
Abbreviated Journal |
J Anim Physiol Anim Nutr (Berl) |
| Volume |
91 |
Issue |
5-6 |
Pages |
193-204 |
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| Abstract |
To test whether mineral recommendations for horses are likely to guarantee adequate mineral provision for black rhinoceroses (Diceros bicornis), we investigated the apparent absorption (aA) of macro- and microminerals in eight black rhinoceroses from three zoological institutions in a total of 32 feeding trials with total faecal collection, with additional data from three unpublished studies (18 feeding trials). Feeds and faeces were analysed for Ca, P, Mg, Na, K, Fe, Mn, Cu, Zn and Co. The resulting aA coefficients, and the linear relationships of apparently absorbable dietary mineral content to total dietary mineral content [per 100 g dry matter (DM)], were compared with data for domestic horses. Rhinoceroses had significantly higher aA coefficients for Ca and Mg (because of a higher calculated 'true' absorption), and lower ones for Na and K (because of calculated higher endogenous faecal losses). High absorption efficiency for divalent cations is hypothesized to be an adaptation to a natural diet of particularly high Ca:P ratio (approximately 14:1); an effective removal of Ca from the ingesta guarantees sufficient P availability at the fermentation site in the hindgut. Higher faecal losses of Na and K are hypothesized to be linked to a higher faecal bulk per DM intake in black rhinoceroses as compared with horses because of a generally lower digestive efficiency. There were no relevant differences in the absorption patterns of microminerals. In particular, there were no discernable differences in Fe absorption within the rhinoceroses for diets with and without tannin supplementation. Several of the zoo diets assessed in this study were deficient in Cu, Mn or Zn, and most contained excessive levels of Fe when compared with horse requirements. The findings of this study indicate that differences in mineral absorption between occur even between species of similar digestive anatomy; that in particular, Ca absorption might vary between hindgut fermenters with Ca:P ratio in their natural diet; that Na might be a particularly limiting factor in the ecology of free-ranging rhinoceroses; that moderate doses of tannins do not seem to markedly influence mineral absorption; and that diets for captive animals should contain adequate, but not excessive mineral levels. |
| Address |
Division of Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Switzerland. mclauss@vetclinics.uzh.ch |
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0931-2439 |
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| Notes |
PMID:17516940 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2619 |
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| Author |
Morell, V. |
| Title |
Nicola Clayton profile. Nicky and the jays |
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| Year |
2007 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
315 |
Issue |
5815 |
Pages |
1074-1075 |
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Animals; *Behavior, Animal; *Cognition; England; History, 20th Century; History, 21st Century; Intelligence; Memory; Passeriformes/*physiology; Portraits |
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1095-9203 |
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| Notes |
PMID:17322042 |
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no |
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Equine Behaviour @ team @ |
Serial |
2833 |
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| Author |
Cohen, J. |
| Title |
Animal behavior. The world through a chimp's eyes |
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| Year |
2007 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
316 |
Issue |
5821 |
Pages |
44-45 |
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Animal Communication; Animals; *Behavior, Animal; Cognition; Cooperative Behavior; Culture; Memory; Pan troglodytes/*psychology; Social Behavior; Tool Use Behavior |
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1095-9203 |
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| Notes |
PMID:17412932 |
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no |
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Equine Behaviour @ team @ |
Serial |
2832 |
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| Author |
Straub, A. |
| Title |
An intelligent crow beats a lab |
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Journal Article |
| Year |
2007 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
| Volume |
316 |
Issue |
5825 |
Pages |
688 |
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Animals; *Behavior, Animal; *Cognition; *Crows; Dogs; Intelligence; Memory |
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1095-9203 |
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| Notes |
PMID:17478698 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4102 |
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| Author |
Silk, J.B. |
| Title |
Social Components of Fitness in Primate Groups |
Type |
Journal Article |
| Year |
2007 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
317 |
Issue |
5843 |
Pages |
1347-1351 |
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| Abstract |
There is much interest in the evolutionary forces that favored the evolution of large brains in the primate order. The social brain hypothesis posits that selection has favored larger brains and more complex cognitive capacities as a means to cope with the challenges of social life. The hypothesis is supported by evidence that shows that group size is linked to various measures of brain size. But it has not been clear how cognitive complexity confers fitness advantages on individuals. Research in the field and laboratory shows that sophisticated social cognition underlies social behavior in primate groups. Moreover, a growing body of evidence suggests that the quality of social relationships has measurable fitness consequences for individuals. |
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10.1126/science.1140734 |
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no |
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Equine Behaviour @ team @ |
Serial |
4239 |
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| Author |
Pennisi, E. |
| Title |
PSYCHOLOGY: Nonhuman Primates Demonstrate Humanlike Reasoning |
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Journal Article |
| Year |
2007 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
317 |
Issue |
5843 |
Pages |
1308- |
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no |
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Equine Behaviour @ team @ |
Serial |
4240 |
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| Author |
Wood, J.N.; Glynn, D.D.; Phillips, B.C.; Hauser, M.D. |
| Title |
The Perception of Rational, Goal-Directed Action in Nonhuman Primates |
Type |
Journal Article |
| Year |
2007 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
317 |
Issue |
5843 |
Pages |
1402-1405 |
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| Abstract |
Humans are capable of making inferences about other individuals' intentions and goals by evaluating their actions in relation to the constraints imposed by the environment. This capacity enables humans to go beyond the surface appearance of behavior to draw inferences about an individual's mental states. Presently unclear is whether this capacity is uniquely human or is shared with other animals. We show that cotton-top tamarins, rhesus macaques, and chimpanzees all make spontaneous inferences about a human experimenter's goal by attending to the environmental constraints that guide rational action. These findings rule out simple associative accounts of action perception and show that our capacity to infer rational, goal-directed action likely arose at least as far back as the New World monkeys, some 40 million years ago. |
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no |
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Equine Behaviour @ team @ |
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4241 |
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Wood, J.N.; Glynn, D.D.; Phillips, B.C.; Hauser, M.D. |
| Title |
online material |
Type |
Miscellaneous |
| Year |
2007 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
317 |
Issue |
5843 |
Pages |
1402-1405 |
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| Abstract |
Humans are capable of making inferences about other individuals' intentions and goals by evaluating their actions in relation to the constraints imposed by the environment. This capacity enables humans to go beyond the surface appearance of behavior to draw inferences about an individual's mental states. Presently unclear is whether this capacity is uniquely human or is shared with other animals. We show that cotton-top tamarins, rhesus macaques, and chimpanzees all make spontaneous inferences about a human experimenter's goal by attending to the environmental constraints that guide rational action. These findings rule out simple associative accounts of action perception and show that our capacity to infer rational, goal-directed action likely arose at least as far back as the New World monkeys, some 40 million years ago. |
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10.1126/science.1144663 |
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no |
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Equine Behaviour @ team @ |
Serial |
4242 |
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| Author |
Dunbar, R.I.M.; Shultz, S. |
| Title |
Evolution in the Social Brain |
Type |
Journal Article |
| Year |
2007 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
317 |
Issue |
5843 |
Pages |
1344-1347 |
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The evolution of unusually large brains in some groups of animals, notably primates, has long been a puzzle. Although early explanations tended to emphasize the brain's role in sensory or technical competence (foraging skills, innovations, and way-finding), the balance of evidence now clearly favors the suggestion that it was the computational demands of living in large, complex societies that selected for large brains. However, recent analyses suggest that it may have been the particular demands of the more intense forms of pairbonding that was the critical factor that triggered this evolutionary development. This may explain why primate sociality seems to be so different from that found in most other birds and mammals: Primate sociality is based on bonded relationships of a kind that are found only in pairbonds in other taxa. |
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Equine Behaviour @ team @ |
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4243 |
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