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| Author | Connor, R.C.; Mann, J.; Tyack, P.L.; Whitehead, H. | ||||
| Title | Social evolution in toothed whales | Type | Journal Article | ||
| Year | 1998 | Publication | Trends in Ecology & Evolution | Abbreviated Journal | Trends. Ecol. Evol |
| Volume | 13 | Issue | 6 | Pages | 228-232 |
| Keywords | odontocetes; toothed whales; social evolution; communication; bottlenose dolphins; sperm whales; long-term studies; foraging | ||||
| Abstract | 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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| ISSN | 0169-5347 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4789 | ||
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| Author | Conradt, L.; Roper, T.J. | ||||
| Title | Consensus decision making in animals | Type | Journal Article | ||
| Year | 2005 | Publication | Trends in Ecology & Evolution (Personal Edition) | Abbreviated Journal | Trends Ecol Evol |
| Volume | 20 | Issue | 8 | Pages | 449-456 |
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| Abstract | Individual animals routinely face decisions that are crucial to their fitness. In social species, however, many of these decisions need to be made jointly with other group members because the group will split apart unless a consensus is reached. Here, we review empirical and theoretical studies of consensus decision making, and place them in a coherent framework. In particular, we classify consensus decisions according to the degree to which they involve conflict of interest between group members, and whether they involve either local or global communication; we ask, for different categories of consensus decision, who makes the decision, what are the underlying mechanisms, and what are the functional consequences. We conclude that consensus decision making is common in non-human animals, and that cooperation between group members in the decision-making process is likely to be the norm, even when the decision involves significant conflict of interest. | ||||
| Address | Department of Biology and Environmental Science, John Maynard Smith Building, University of Sussex, Brighton, UK, BN1 9QG. L.Conradt@sussex.ac.uk | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0169-5347 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:16701416 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4802 | ||
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| Author | Herbert Gintis; Samuel Bowles; Robert Boyd; Ernst Fehr | ||||
| Title | Explaining altruistic behavior in humans | Type | Journal Article | ||
| Year | 2003 | Publication | Evolution and Human Behaviour | Abbreviated Journal | |
| Volume | 24 | Issue | 3 | Pages | 153-172 |
| Keywords | Altruism; Reciprocity; Experimental games; Evolution of cooperation | ||||
| Abstract | Recent experimental research has revealed forms of human behavior involving interaction among unrelated individuals that have proven difficult to explain in terms of kin or reciprocal altruism. One such trait, strong reciprocity is a predisposition to cooperate with others and to punish those who violate the norms of cooperation, at personal cost, even when it is implausible to expect that these costs will be repaid. We present evidence supporting strong reciprocity as a schema for predicting and understanding altruism in humans. We show that under conditions plausibly characteristic of the early stages of human evolution, a small number of strong reciprocators could invade a population of self-regarding types, and strong reciprocity is an evolutionary stable strategy. Although most of the evidence we report is based on behavioral experiments, the same behaviors are regularly described in everyday life, for example, in wage setting by firms, tax compliance, and cooperation in the protection of local environmental public goods. | ||||
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| ISSN | 1090-5138 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ S1090-5138(02)00157-5 | Serial | 4943 | ||
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| Author | Noë, R.; Hammerstein, P. | ||||
| Title | Biological markets | Type | Journal Article | ||
| Year | 1995 | Publication | Trends in Ecology & Evolution | Abbreviated Journal | Trends. Ecol. Evol |
| Volume | 10 | Issue | 8 | Pages | 336-339 |
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| Abstract | In biological markets, two classes of traders exchange commodities to their mutual benefit. Characteristics of markets are: competition within trader classes by contest or outbidding; preference for partners offering the highest value; and conflicts over the exchange value of commodities. Biological markets are currently studied under at least three different headings: sexual selection, intraspecific cooperation and interspecific mutualism. The time is ripe for the development of game theoretic models that describe the common core of biological markets and integrate existing knowledge from the separate fields. | ||||
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| ISSN | 0169-5347 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4993 | ||
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| Author | Ishida, N.; Oyunsuren, T.; Mashima, S.; Mukoyama, H.; Saitou, N. | ||||
| Title | Mitochondrial DNA sequences of various species of the genus Equus with special reference to the phylogenetic relationship between Przewalskii's wild horse and domestic horse | Type | Journal Article | ||
| Year | 1995 | Publication | Journal of Molecular Evolution | Abbreviated Journal | J Mol Evol |
| Volume | 41 | Issue | 2 | Pages | 180-188 |
| Keywords | Animals; Base Sequence; Chromosomes; Conserved Sequence/genetics; DNA, Mitochondrial/*genetics; Evolution; Genetic Variation/*genetics; Horses/*genetics; Molecular Sequence Data; *Phylogeny; RNA, Transfer, Pro/genetics; Sequence Alignment; Sequence Analysis, DNA | ||||
| Abstract | The noncoding region between tRNAPro and the large conserved sequence block is the most variable region in the mammalian mitochondrial DNA D-loop region. This variable region (ca. 270 bp) of four species of Equus, including Mongolian and Japanese native domestic horses as well as Przewalskii's (or Mongolian) wild horse, were sequenced. These data were compared with our recently published Thoroughbred horse mitochondrial DNA sequences. The evolutionary rate of this region among the four species of Equus was estimated to be 2-4 x 10(-8) per site per year. Phylogenetic trees of Equus species demonstrate that Przewalskii's wild horse is within the genetic variation among the domestic horse. This suggests that the chromosome number change (probably increase) of the Przewalskii's wild horse occurred rather recently. | ||||
| Address | Laboratory of Molecular and Cellular Biology, Japan Racing Association, Tokyo | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0022-2844 | ISBN | Medium | ||
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| Notes | PMID:7666447 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5042 | ||
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| Author | Purvis, A. | ||||
| Title | The h index: playing the numbers game | Type | Journal Article | ||
| Year | 2006 | Publication | Trends in Ecology & Evolution | Abbreviated Journal | Trends. Ecol. Evol |
| Volume | 21 | Issue | 8 | Pages | 422-422 |
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| Abstract | Article Outline References The ‘h index’ was developed recently as a measure of research performance [1]: a researcher's h is the number of his or her papers that have been cited at least h times. In their thoughtful critique of the index, Kelly and Jennions [2] point out many ways in which h is no better than ‘traditional’ bibliometrics, such as total citation counts. However, there is one way in which, for researchers, it could be very much better, especially if (as Hirsch suggests [1]) it is to inform hiring and promotion decisions. The skewed nature of the distribution of citations among publications means that most researchers have several papers that nearly but not quite count. Consequently, h can be distorted much more easily than can total citation count just by finding a subtle way to cite one's own papers that are ‘bubbling under’. Incidentally, bats show broadly the same life-history allometries as other mammalian clades [3]. |
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| ISSN | 0169-5347 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5046 | ||
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| Author | Rands, S.A.; Cowlishaw, G.; Pettifor, R.A.; Rowcliffe, J.M.; Johnstone, R.A. | ||||
| Title | The emergence of leaders and followers in foraging pairs when the qualities of individuals differ | Type | Journal Article | ||
| Year | 2008 | Publication | BMC Evolutionary Biology | Abbreviated Journal | BMC Evol Biol |
| Volume | 8 | Issue | Pages | 51 | |
| Keywords | Animals; *Feeding Behavior; *Food Chain; *Models, Biological; *Social Dominance | ||||
| Abstract | BACKGROUND: Foraging in groups offers animals a number of advantages, such as increasing their likelihood of finding food or detecting and avoiding predators. In order for a group to remain together, there has to be some degree of coordination of behaviour and movement between its members (which may in some cases be initiated by a decision-making leader, and in other cases may emerge as an underlying property of the group). For example, behavioural synchronisation is a phenomenon where animals within a group initiate and then continue to conduct identical behaviours, and has been characterised for a wide range of species. We examine how a pair of animals should behave using a state-dependent approach, and ask what conditions are likely to lead to behavioural synchronisation occurring, and whether one of the individuals is more likely to act as a leader. RESULTS: The model we describe considers how the energetic gain, metabolic requirements and predation risks faced by the individuals affect measures of their energetic state and behaviour (such as the degree of behavioural synchronisation seen within the pair, and the value to an individual of knowing the energetic state of its colleague). We explore how predictable changes in these measures are in response to changes in physiological requirements and predation risk. We also consider how these measures should change when the members of the pair are not identical in their metabolic requirements or their susceptibility to predation. We find that many of the changes seen in these measures are complex, especially when asymmetries exist between the members of the pair. CONCLUSION: Analyses are presented that demonstrate that, although these general patterns are robust, care needs to be taken when considering the effects of individual differences, as the relationship between individual differences and the resulting qualitative changes in behaviour may be complex. We discuss how these results are related to experimental observations, and how the model and its predictions could be extended. | ||||
| Address | Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. sean.rands@bristol.ac.uk | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 1471-2148 | ISBN | Medium | ||
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| Notes | PMID:18282297 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5126 | ||
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| Author | List, C. | ||||
| Title | Democracy in animal groups: a political science perspective | Type | Journal Article | ||
| Year | 2004 | Publication | Trends in Ecology & Evolution (Personal Edition) | Abbreviated Journal | Trends Ecol Evol |
| Volume | 19 | Issue | 4 | Pages | 168-169 |
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0169-5347 | ISBN | Medium | ||
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| Notes | PMID:16701250 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5137 | ||
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| Author | Lusseau, D. | ||||
| Title | Evidence for social role in a dolphin social network | Type | Journal Article | ||
| Year | 2007 | Publication | Evolutionary Ecology | Abbreviated Journal | Evol. Ecol. |
| Volume | 21 | Issue | 3 | Pages | 357-366 |
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| Abstract | Abstract Social animals have to take into consideration the behaviour of conspecifics when making decisions to go by their daily lives. These decisions affect their fitness and there is therefore an evolutionary pressure to try making the right choices. In many instances individuals will make their own choices and the behaviour of the group will be a democratic integration of everyone’s decision. However, in some instances it can be advantageous to follow the choice of a few individuals in the group if they have more information regarding the situation that has arisen. Here I provide early evidence that decisions about shifts in activity states in a population of bottlenose dolphin follow such a decision-making process. This unshared consensus is mediated by a non-vocal signal, which can be communicated globally within the dolphin school. These signals are emitted by individuals that tend to have more information about the behaviour of potential competitors because of their position in the social network. I hypothesise that this decision-making process emerged from the social structure of the population and the need to maintain mixed-sex schools. | ||||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5154 | ||
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| Author | Wilson, S. D.; Clark, A. B.; Coleman, K.; Dearstyne, T. | ||||
| Title | Shyness and boldness in humans and other animals | Type | Journal Article | ||
| Year | 1994 | Publication | Trends in Ecology & Evolution | Abbreviated Journal | Trends. Ecol. Evol |
| Volume | 9 | Issue | 11 | Pages | 442-446 |
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| Abstract | The shy-bold continuum is a fundamental axis of behavioral variation in humans and at least some other species, but its taxonomic distribution and evolutionary implications are unknown. Models of optimal risk, density- or frequency-dependent selection, and phenotypic plasticity can provide a theoretical framework for understanding shyness and boldness as a product of natural selection. We sketch this framework and review the few empirical studies of shyness and boldness in natural populations. The study of shyness and boldness adds an interesting new dimension to behavioral ecology by focusing on the nature of continuous behavioral variation that exists within the familiar categories of age, sex and size. | ||||
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| ISSN | 0169-5347 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5161 | ||
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