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Author |
Arnold, K.; Zuberbuhler, K. |
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Title |
Language evolution: semantic combinations in primate calls |
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Journal Article |
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Year |
2006 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
441 |
Issue |
7091 |
Pages |
303 |
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Keywords |
Animal Migration; Animals; Eagles/physiology; *Evolution; Female; Haplorhini/*physiology; Male; Predatory Behavior; *Semantics; *Vocalization, Animal |
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Abstract |
Syntax sets human language apart from other natural communication systems, although its evolutionary origins are obscure. Here we show that free-ranging putty-nosed monkeys combine two vocalizations into different call sequences that are linked to specific external events, such as the presence of a predator and the imminent movement of the group. Our findings indicate that non-human primates can combine calls into higher-order sequences that have a particular meaning. |
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School of Psychology, University of St Andrews, St Andrews KY16 9JP, UK |
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1476-4687 |
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PMID:16710411 |
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no |
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Call Number |
refbase @ user @ |
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354 |
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Author |
Fenton, B.; Ratcliffe, J. |
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Title |
Animal behaviour: eavesdropping on bats |
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Journal Article |
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Year |
2004 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
429 |
Issue |
6992 |
Pages |
612-613 |
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Keywords |
Acoustics; Animals; Chiroptera/anatomy & histology/classification/genetics/*physiology; Echolocation/*physiology; *Evolution; Phylogeny; Predatory Behavior/physiology; Species Specificity |
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1476-4687 |
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PMID:15190335 |
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refbase @ user @ |
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500 |
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Author |
Amdam, G.V.; Csondes, A.; Fondrk, M.K.; Page, R.E.J. |
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Title |
Complex social behaviour derived from maternal reproductive traits |
Type |
Journal Article |
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Year |
2006 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
439 |
Issue |
7072 |
Pages |
76-78 |
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Keywords |
Aging/physiology; Animals; Bees/*physiology; *Evolution; Feeding Behavior/*physiology; Female; Infertility, Female; Maternal Behavior/*physiology; Ovary/physiology; Pollen/metabolism; Reproduction/*physiology; *Social Behavior |
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A fundamental goal of sociobiology is to explain how complex social behaviour evolves, especially in social insects, the exemplars of social living. Although still the subject of much controversy, recent theoretical explanations have focused on the evolutionary origins of worker behaviour (assistance from daughters that remain in the nest and help their mother to reproduce) through expression of maternal care behaviour towards siblings. A key prediction of this evolutionary model is that traits involved in maternal care have been co-opted through heterochronous expression of maternal genes to result in sib-care, the hallmark of highly evolved social life in insects. A coupling of maternal behaviour to reproductive status evolved in solitary insects, and was a ready substrate for the evolution of worker-containing societies. Here we show that division of foraging labour among worker honey bees (Apis mellifera) is linked to the reproductive status of facultatively sterile females. We thereby identify the evolutionary origin of a widely expressed social-insect behavioural syndrome, and provide a direct demonstration of how variation in maternal reproductive traits gives rise to complex social behaviour in non-reproductive helpers. |
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Arizona State University, School of Life Sciences, Tempe, Arizona 85287, USA. Gro.Amdam@asu.edu |
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1476-4687 |
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PMID:16397498 |
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no |
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Call Number |
refbase @ user @ |
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531 |
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Author |
Wolf, M.; van Doorn, G.S.; Leimar, O.; Weissing, F.J. |
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Title |
Life-history trade-offs favour the evolution of animal personalities |
Type |
Journal Article |
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Year |
2007 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
447 |
Issue |
7144 |
Pages |
581-584 |
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Keywords |
Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Exploratory Behavior/physiology; Models, Biological; Personality/*physiology; Predatory Behavior/physiology; Reproduction/physiology; Risk-Taking; Selection (Genetics) |
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In recent years evidence has been accumulating that personalities are not only found in humans but also in a wide range of other animal species. Individuals differ consistently in their behavioural tendencies and the behaviour in one context is correlated with the behaviour in multiple other contexts. From an adaptive perspective, the evolution of animal personalities is still a mystery, because a more flexible structure of behaviour should provide a selective advantage. Accordingly, many researchers view personalities as resulting from constraints imposed by the architecture of behaviour (but see ref. 12). In contrast, we show here that animal personalities can be given an adaptive explanation. Our argument is based on the insight that the trade-off between current and future reproduction often results in polymorphic populations in which some individuals put more emphasis on future fitness returns than others. Life-history theory predicts that such differences in fitness expectations should result in systematic differences in risk-taking behaviour. Individuals with high future expectations (who have much to lose) should be more risk-averse than individuals with low expectations. This applies to all kinds of risky situations, so individuals should consistently differ in their behaviour. By means of an evolutionary model we demonstrate that this basic principle results in the evolution of animal personalities. It simultaneously explains the coexistence of behavioural types, the consistency of behaviour through time and the structure of behavioural correlations across contexts. Moreover, it explains the common finding that explorative behaviour and risk-related traits like boldness and aggressiveness are common characteristics of animal personalities. |
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Theoretical Biology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands |
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1476-4687 |
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PMID:17538618 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4098 |
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Author |
Bell, A.M. |
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Title |
Evolutionary biology: animal personalities |
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Year |
2007 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
447 |
Issue |
7144 |
Pages |
539-540 |
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Keywords |
Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Humans; *Models, Biological; Personality/genetics/*physiology; Reproduction/genetics/physiology; Risk-Taking; Selection (Genetics) |
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1476-4687 |
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PMID:17538607 |
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Equine Behaviour @ team @ |
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4099 |
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Author |
Dunbar, R.I.M. |
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Title |
Male and female brain evolution is subject to contrasting selection pressures in primates |
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Journal Article |
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Year |
2007 |
Publication |
BMC Biology |
Abbreviated Journal |
BMC Biol |
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Volume |
5 |
Issue |
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Pages |
21 |
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Keywords |
Animals; *Brain/physiology; *Evolution; Female; Humans; Male; *Selection (Genetics); *Sex Characteristics |
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Abstract |
The claim that differences in brain size across primate species has mainly been driven by the demands of sociality (the “social brain” hypothesis) is now widely accepted. Some of the evidence to support this comes from the fact that species that live in large social groups have larger brains, and in particular larger neocortices. Lindenfors and colleagues (BMC Biology 5:20) add significantly to our appreciation of this process by showing that there are striking differences between the two sexes in the social mechanisms and brain units involved. Female sociality (which is more affiliative) is related most closely to neocortex volume, but male sociality (which is more competitive and combative) is more closely related to subcortical units (notably those associated with emotional responses). Thus different brain units have responded to different selection pressures. |
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British Academy Centenary Research Project, School of Biological Sciences, University of Liverpool, Liverpool, UK. rimd@liv.ac.uk |
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1741-7007 |
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PMID:17493267 |
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2100 |
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