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Author |
Lefebvre, L.; Whittle, P.; Lascaris, E.; Finkelstein, A. |
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Title |
Feeding innovations and forebrain size in birds |
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Year |
1997 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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53 |
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3 |
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549-560 |
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Abstract |
The links between ecology, behavioural plasticity and brain size are often tested via the comparative method. Given the problems in interpretating comparative tests of learning and cognition, however, alternative measures of plasticity need to be developed. From the short notes section of nine ornithological journals, two separate, exhaustive data sets have been collated on opportunistic foraging innovations in birds of North America (1973-1993;N=196) and the British Isles (1983-1993;N=126). Both the absolute and relative frequencies (corrected for species number per order) of innovations differ between bird orders in a similar fashion in the two geographical zones. Absolute and relative frequency of innovations per order are also related to two measures of relative forebrain size in the two zones. The study confirms predicted trends linking opportunism, brain size and rate of structural evolution. It also suggests that innovation rate in the field may be a useful measure of behavioural plasticity. |
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0003-3472 |
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Equine Behaviour @ team @ |
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4740 |
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Author |
Wilson, D.S.; Dugatkin, L.A. |
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Title |
A reply to Lombardi & Hurlbert |
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Journal Article |
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Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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52 |
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2 |
Pages |
423-425 |
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refbase @ user @ |
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475 |
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Author |
Galef, B.G. |
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Title |
The adaptive value of social learning: a reply to Laland |
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Journal Article |
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Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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52 |
Issue |
3 |
Pages |
641-644 |
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refbase @ user @ |
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566 |
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Monard, A.-M.; Duncan, P. |
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Title |
Consequences of natal dispersal in female horses |
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Journal Article |
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Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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52 |
Issue |
3 |
Pages |
565-579 |
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Abstract |
Social, genetic and reproductive consequences of natal dispersal were investigated in female horses,Equus caballus, living in a herd with a natural social structure. Dispersal did not as a rule reduce the level of competition the young mares faced: they did not selectively join groups with fewer resident females than the groups they left, and they did not attain higher ranks; there was also no tendency for females to disperse to groups with the fewest resident females, and they suffered more aggression from the mares in their new groups than in their natal groups. These results therefore do not support the hypothesis that a function of natal dispersal is to reduce intra-sexual competition. The young mares nevertheless dispersed non-randomly, generally joining harems with one stallion and at least two subadult females; and they preferred to move to groups with familiar females but no familiar males. As a result, most were closely related to some females of their new groups, but distantly related or unrelated to the male(s). Since after dispersal the young mares bred only with a male of their new groups, inbreeding coefficients of most (85%) of their offspring were lower than from matings between half siblings. These results are consistent with the hypothesis that a function of natal dispersal is to avoid close inbreeding. Dispersal did not appear to involve reproductive costs: the young mares suffered no delay in age at first reproduction, and the survival rates of their first foals tended to be higher if the females had emigrated, although not significantly so. |
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Equine Behaviour @ team @ |
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2386 |
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Author |
Dugatkin, L.A. |
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Title |
Tit for Tat, by-product mutualism and predator inspection: a reply to Connor |
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Journal Article |
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Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
51 |
Issue |
2 |
Pages |
455-457 |
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refbase @ user @ |
Serial |
487 |
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Author |
Brunner, D.; Kacelnik, A.; Gibbon, J. |
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Title |
Memory for inter-reinforcement interval variability and patch departure decisions in the starling,Sturnus vulgaris |
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Journal Article |
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Year |
1996 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
51 |
Issue |
5 |
Pages |
1025-1045 |
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An experiment with starlings was conducted to investigate the effect of variability in inter-reinforcement intervals on foraging decisions. The experimental design simulated an environment in which food was distributed in patches. Patches contained zero to four food items which could be collected by pecking at a key. All patches ended with sudden depletion. The time elapsed since the last reinforcement was the only way to detect the depletion of the patch. Once a patch was depleted, a new patch could be reached by completion of a travel requirement of 20 flights between two perches. Key pecks within a patch and the time of the last response in a patch (giving-in time) were recorded. The level of variability in the inter-reinforcement intervals was varied between different conditions. An increase in inter-reinforcement interval variability resulted in a flattening of response rate functions and giving-in time distributions, and in more asymmetry of the response functions, but not of the giving-in time distributions. Two theoretical models of decision making are presented, which differ in the assumptions about memory constraints. In one case, all inter-reinforcement intervals are remembered but in the other, only the intervals with extreme values are remembered. Both models accommodate response rates as a function of trial time, but only the second is compatible with the observed departure decision. Our results are compatible with net rate maximization. |
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2109 |
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Author |
Heyes CM |
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Title |
Self-recognition in primates: irreverence, irrelevance and irony |
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Journal Article |
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Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
51 |
Issue |
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Pages |
470 |
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Equine Behaviour @ team @ |
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3007 |
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Author |
Mitchell R |
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Title |
Self-recognition, methodology and explanation: a comment on Heyes (1994) |
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Journal Article |
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1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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51 |
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467 |
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Equine Behaviour @ team @ |
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3020 |
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Author |
Coussi-Korbel, S.; Fragaszy, D.M. |
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Title |
On the relation between social dynamics and social learning |
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Journal Article |
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Year |
1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
50 |
Issue |
6 |
Pages |
1441-1453 |
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Experimental studies on social learning in animals have commonly centred on the psychological processes responsible for learning, and neglected social processes as potential influences on both the likelihood of social learning and the type of information that can be acquired socially. A model relating social learning to social dynamics among members of a group is presented. Three key hypotheses of the model are (1) behavioural coordination in time and/or space supports the process of social learning; (2) different kinds of coordination differentially support acquisition of different kinds of information; and (3) the various forms of behavioural coordination will be differentially affected by social dynamics. Several predictions relating inter-individual and group differences in social dynamics to social learning that follow from these hypotheses are presented. |
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568 |
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Author |
Byrnl, R.W.; Tomasello, M. |
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Title |
Do rats ape? |
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Journal Article |
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1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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50 |
Issue |
5 |
Pages |
1417-1420 |
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refbase @ user @ |
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589 |
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