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Author |
Connor, R.C.; Mann, J.; Tyack, P.L.; Whitehead, H. |
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Title |
Social evolution in toothed whales |
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1998 |
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Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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13 |
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6 |
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228-232 |
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Keywords |
odontocetes; toothed whales; social evolution; communication; bottlenose dolphins; sperm whales; long-term studies; foraging |
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Two contrasting results emerge from comparisons of the social systems of several odontocetes with terrestrial mammals. Researchers have identified remarkable convergence in prominent features of the social systems of odontocetes such as the sperm whale and bottlenose dolphin with a few well-known terrestrial mammals such as the elephant and chimpanzee. In contrast, studies on killer whales and Baird's beaked whale reveal novel social solutions to aquatic living. The combination of convergent and novel features in odontocete social systems promise a more general understanding of the ecological determinants of social systems in both terrestrial and aquatic habitats, as well as the relationship between relative brain size and social evolution. |
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Equine Behaviour @ team @ |
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4789 |
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Author |
Tibbetts, E.A.; Dale, J. |
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Title |
Individual recognition: it is good to be different |
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Journal Article |
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2007 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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22 |
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10 |
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529-537 |
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Individual recognition (IR) behavior has been widely studied, uncovering spectacular recognition abilities across a range of taxa and modalities. Most studies of IR focus on the recognizer (receiver). These studies typically explore whether a species is capable of IR, the cues that are used for recognition and the specializations that receivers use to facilitate recognition. However, relatively little research has explored the other half of the communication equation: the individual being recognized (signaler). Provided there is a benefit to being accurately identified, signalers are expected to actively broadcast their identity with distinctive cues. Considering the prevalence of IR, there are probably widespread benefits associated with distinctiveness. As a result, selection for traits that reveal individual identity might represent an important and underappreciated selective force contributing to the evolution and maintenance of genetic polymorphisms. |
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Equine Behaviour @ team @ |
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4572 |
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Author |
Creel, S. |
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Title |
Social dominance and stress hormones |
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Journal Article |
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Year |
2001 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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16 |
Issue |
9 |
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491-497 |
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Dominance; rank; stress; glucocorticoids; cooperative breeding; sociality; behavioural endocrinology; mammals |
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In most cooperatively breeding birds and mammals, reproductive rates are lower for social subordinates than for dominants, and it is common for reproduction in subordinates to be completely suppressed. Early research conducted in captivity showed that losing fights can increase glucocorticoid (GC) secretion, a general response to stress. Because GCs can suppress reproduction, it has been widely argued that chronic stress might underlie reproductive suppression of social subordinates in cooperative breeders. Contradicting this hypothesis, recent studies of cooperative breeders in the wild show that dominant individuals have elevated GCs more often than do subordinates. The findings that elevated GCs can be a consequence of subordination or a cost of dominance complicate the conventional view of social stress, with broad ramifications for the evolution of dominance and reproductive suppression. |
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Equine Behaviour @ team @ |
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4072 |
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Sih, A.; Bell, A.; Johnson, J.C. |
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Title |
Behavioral syndromes: an ecological and evolutionary overview |
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2004 |
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Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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19 |
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7 |
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372-378 |
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Recent studies suggest that populations and species often exhibit behavioral syndromes; that is, suites of correlated behaviors across situations. An example is an aggression syndrome where some individuals are more aggressive, whereas others are less aggressive across a range of situations and contexts. The existence of behavioral syndromes focuses the attention of behavioral ecologists on limited (less than optimal) behavioral plasticity and behavioral carryovers across situations, rather than on optimal plasticity in each isolated situation. Behavioral syndromes can explain behaviors that appear strikingly non-adaptive in an isolated context (e.g. inappropriately high activity when predators are present, or excessive sexual cannibalism). Behavioral syndromes can also help to explain the maintenance of individual variation in behavioral types, a phenomenon that is ubiquitous, but often ignored. Recent studies suggest that the behavioral type of an individual, population or species can have important ecological and evolutionary implications, including major effects on species distributions, on the relative tendencies of species to be invasive or to respond well to environmental change, and on speciation rates. Although most studies of behavioral syndromes to date have focused on a few organisms, mainly in the laboratory, further work on other species, particularly in the field, should yield numerous new insights. |
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Equine Behaviour @ team @ |
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2185 |
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Author |
Dall, S.R.X.; Giraldeau, L.-A.; Olsson, O.; McNamara, J.M.; Stephens, D.W. |
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Title |
Information and its use by animals in evolutionary ecology |
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Journal Article |
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Year |
2005 |
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Trends in Ecology & Evolution (Personal Edition) |
Abbreviated Journal |
Trends Ecol Evol |
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20 |
Issue |
4 |
Pages |
187-193 |
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Information is a crucial currency for animals from both a behavioural and evolutionary perspective. Adaptive behaviour relies upon accurate estimation of relevant ecological parameters; the better informed an individual, the better it can develop and adjust its behaviour to meet the demands of a variable world. Here, we focus on the burgeoning interest in the impact of ecological uncertainty on adaptation, and the means by which it can be reduced by gathering information, from both 'passive' and 'responsive' sources. Our overview demonstrates the value of adopting an explicitly informational approach, and highlights the components that one needs to develop useful approaches to studying information use by animals. We propose a quantitative framework, based on statistical decision theory, for analysing animal information use in evolutionary ecology. Our purpose is to promote an integrative approach to studying information use by animals, which is itself integral to adaptive animal behaviour and organismal biology. |
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Centre for Ecology and Conservation, University of Exeter in Cornwall, Tremough Campus, Penryn, UK, TR10 9EZ. sashadall@iname.com |
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0169-5347 |
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PMID:16701367 |
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2128 |
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Healy,S.; Braithwaite, V |
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Title |
Cognitive ecology: a field of substance? |
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Journal Article |
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Year |
2000 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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15 |
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1 |
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22-26 |
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Cognitive ecology; Neuroethology; Cognition; Ecology; Evolution; Orientation mechanisms |
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In 1993, Les Real invented the label 'cognitive ecology'. This label was intended for work that brought cognitive science and behavioural ecology together. Real's article stressed the importance of such an approach to the understanding of behaviour. At the end of a decade in which more interdisciplinary work on behaviour has been seen than for many years, it is time to assess whether cognitive ecology is a label describing an active field. |
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Division of Biological Sciences, King's Buildings, University of Edinburgh, West Mains Road, Edinburgh, UK EH9 3JT |
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0169-5347 |
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PMID:10603501 |
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refbase @ user @ |
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837 |
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Czaran, T. |
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Game theory and evolutionary ecology: Evolutionary Games & Population Dynamics by J. Hofbauer and K. Sigmund, and Game Theory & Animal Behaviour, edited by L.A. Dugatkin and H.K. Reeve |
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1999 |
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Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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14 |
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6 |
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246-247 |
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Game theory; Evolutionary ecology; Population dynamics; Ethology |
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refbase @ user @ |
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485 |
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Author |
Shettleworth, S.J. |
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Title |
Cognitive ecology: field or label? |
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2000 |
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Trends in Ecology & Evolution |
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Trends. Ecol. Evol |
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15 |
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4 |
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161 |
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Depts of Psychology and Zoology, University of Toronto, Toronto, Ontario, Canada M5S 3G3 |
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PMID:10717686 |
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refbase @ user @ |
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