Physical cognition in parrots: a comparative approach PDF
Preview Physical cognition in parrots: a comparative approach
Physical cognition in parrots: a comparative approach Dissertation Zur Erlangung der Würde des Doktors der Naturwissenschaften des Fachbereichs Biologie, der Fakultät für Mathematik, Informatik und Naturwissenschaften, der Universität Hamburg vorgelegt von Anastasia Krasheninnikova aus Moskau Hamburg 2014 The evolution of sense is, in a sense, the evolution of nonsense. from ‘Pnin’ Vladimir Nabokov, 1953 INHALTSVERZEICHNIS Summary 1 Zusammenfassung 3 Introduction 5 Chapter 1 No evidence for an association of phylogeny and cognitive performance in parrots Anastasia Krasheninnikova, Ulrike Busse, Jutta M. Schneider submitted 9 Chapter 2 Comparative analysis of string-pulling behaviour in parrots: revealing evolutionary pressures that shape cognitive abilities Anastasia Krasheninnikova submitted 19 Chapter 3 Patterned-string tasks: relation between fine motor skills and visual-spatial abilities in parrots Anastasia Krasheninnikova PLOS One 2013, 8(12): e85499 33 Chapter 4 Physical cognition in parrots: Performances of green-winged macaws in three means-end paradigms Anastasia Krasheninnikova, Sina Bohnec, Jana Verena Dave, Bianca Wist, Jannis Liedtke unpublished 49 Chapter 5 Testing problem-solving capacities: differences between individual testing and social group setting Anastasia Krasheninnikova, Jutta M. Schneider Animal Cognition 2014, DOI 10.1007/s10071-014-0744-1 63 Chapter 6 Individual differences in cognitive paradigms relate to differences in personality Anastasia Krasheninnikova submitted 71 General Discussion 81 References 85 Acknowledgements 91 Author Contributions 93 Physical cognition in parrots Summary SUMMARY Animals differ considerably in intelligence, In my thesis, I provide the first evidence for an defined as the speed and the success with which interrelation between visual-spatial and motor they solve problems related to surviving in their abilities in non-mammalian animals by showing environment. There are a number of evolutionary that more highly developed motor abilities hypotheses which attempt to explain cognitive correlate positively with parrots’ performance in variation across species as well as how cognitive patterned-string tasks. traits may have evolved. A comparative approach Furthermore, parrots tested in a social allows us to test these evolutionary questions on context and those tested singly showed similar the origins of and the ecological pressures on cognitive capacity in solving patterned-string cognitive abilities. For example: Do phylo- problems. In contrast to previous studies, my genetically closely related species share similar findings revealed that, at least in the case of cognitive abilities? What kind of evolutionary highly social species the testing in social settings pressures shape cognitive abilities across does not appear to bias the results obtained in species? Does the social environment play a physical cognition experiment. On the contrary, special role in shaping cognition? Comparisons testing of problem-solving in a social context across species require careful consideration of better reflects natural behaviour and is thus the experimental methods used and the factors more ecologically relevant for highly social that may affect an individual’s performance in an species that often have to deal with cognitive experiment. challenges under conditions of social compe- In this thesis, I studied the abilities of different tition. Furthermore, I could show that the parrot species to solve physical problems. I used parrots’ willingness to participate in the tasks was the string-pulling paradigm to investigate this significantly higher in a social context. Thus, the issue – a method that has been proved to be social settings may provide advantages by suitable for investigating cognitive evolution decreasing the level of individual fearfulness and across species. I present the following new stress. findings: The study species consistently showed The considerable variation in the ability to individual differences in personality, which solve patterned-string problems found among correlated with individual cognitive differences in parrots was not related to their phylogenetic solving string-pulling problems, showing that relationship. Rather, the variation in psittacines’ more explorative individuals were less accurate cognitive abilities such as the understanding of in solving more complex string patterns. My mean-end relations, connectedness, and findings also suggest that the effect of persona- functionality was best explained by social lity on cognitive performance might depend on components of their natural environment such as the complexity of the task. Moreover, differences fission-fusion dynamics, breeding system and the in personality traits may also determine whether size of the daily groups. It appears that parrots’ social context facilitates or impairs an individual’s enhanced cognition in the physical domain is of a response to a novel situation. Differences in domain-general nature, rather than an adaptive personality traits as well as social context thus specialization to a certain ecological niche, and must be carefully considered when designing might have been evolutionarily favoured by the setups, interpreting findings and comparing them cognitive challenge of living in a complex social across species. environment. 1 Summary Physical cognition in parrots 2
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