## Parental provisioning drives brain size in birds

2023
##### Authors
Drobniak, Szymon M.
Graber, Sereina M.
van Schaik, Carel P.
Journal article
Published
##### Published in
Proceedings of the National Academy of Sciences of the United States of America (PNAS) ; 120 (2023), 2. - e2121467120. - National Academy of Sciences. - ISSN 0027-8424. - eISSN 1091-6490
##### Abstract
Large brains support numerous cognitive adaptations and therefore may appear to be highly beneficial. Nonetheless, the high energetic costs of brain tissue may have prevented the evolution of large brains in many species. This problem may also have a developmental dimension: juveniles, with their immature and therefore poorly performing brains, would face a major energetic hurdle if they were to pay for the construction of their own brain, especially in larger-brained species. Here, we explore the possible role of parental provisioning for the development and evolution of adult brain size in birds. A comparative analysis of 1,176 bird species shows that various measures of parental provisioning (precocial vs. altricial state at hatching, relative egg mass, time spent provisioning the young) strongly predict relative brain size across species. The parental provisioning hypothesis also provides an explanation for the well-documented but so far unexplained pattern that altricial birds have larger brains than precocial ones. We therefore conclude that the evolution of parental provisioning allowed species to overcome the seemingly insurmountable energetic constraint on growing large brains, which in turn enabled bird species to increase survival and population stability. Because including adult eco- and socio-cognitive predictors only marginally improved the explanatory value of our models, these findings also suggest that the traditionally assessed cognitive abilities largely support successful parental provisioning. Our results therefore indicate that the cognitive adaptations underlying successful parental provisioning also provide the behavioral flexibility facilitating reproductive success and survival.
##### Subject (DDC)
570 Biosciences, Biology
##### Keywords
precocial and altricial birds, cognitive evolution, expensive brain hypothesis, comparative study, brain development
##### Cite This
ISO 690GRIESSER, Michael, Szymon M. DROBNIAK, Sereina M. GRABER, Carel P. VAN SCHAIK, 2023. Parental provisioning drives brain size in birds. In: Proceedings of the National Academy of Sciences of the United States of America (PNAS). National Academy of Sciences. 120(2), e2121467120. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.2121467120
BibTex
@article{Griesser2023-01-10Paren-59729,
year={2023},
doi={10.1073/pnas.2121467120},
title={Parental provisioning drives brain size in birds},
number={2},
volume={120},
issn={0027-8424},
journal={Proceedings of the National Academy of Sciences of the United States of America (PNAS)},
author={Griesser, Michael and Drobniak, Szymon M. and Graber, Sereina M. and van Schaik, Carel P.},
note={Article Number: e2121467120}
}

RDF
<rdf:RDF
xmlns:dcterms="http://purl.org/dc/terms/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:bibo="http://purl.org/ontology/bibo/"
xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
xmlns:foaf="http://xmlns.com/foaf/0.1/"
xmlns:void="http://rdfs.org/ns/void#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#" >
<dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
<dc:creator>Griesser, Michael</dc:creator>
<void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
<dc:creator>Drobniak, Szymon M.</dc:creator>
<dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
<dc:contributor>Drobniak, Szymon M.</dc:contributor>
<dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2023-01-16T13:00:05Z</dc:date>
<bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/59729"/>
<dc:contributor>van Schaik, Carel P.</dc:contributor>
<dcterms:title>Parental provisioning drives brain size in birds</dcterms:title>
<dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/43615"/>
<dc:creator>Graber, Sereina M.</dc:creator>
<foaf:homepage rdf:resource="http://localhost:8080/"/>
<dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/59729/1/Griesser_2-10w3di2s8f1od5.pdf"/>
<dcterms:issued>2023-01-10</dcterms:issued>
<dcterms:abstract xml:lang="eng">Large brains support numerous cognitive adaptations and therefore may appear to be highly beneficial. Nonetheless, the high energetic costs of brain tissue may have prevented the evolution of large brains in many species. This problem may also have a developmental dimension: juveniles, with their immature and therefore poorly performing brains, would face a major energetic hurdle if they were to pay for the construction of their own brain, especially in larger-brained species. Here, we explore the possible role of parental provisioning for the development and evolution of adult brain size in birds. A comparative analysis of 1,176 bird species shows that various measures of parental provisioning (precocial vs. altricial state at hatching, relative egg mass, time spent provisioning the young) strongly predict relative brain size across species. The parental provisioning hypothesis also provides an explanation for the well-documented but so far unexplained pattern that altricial birds have larger brains than precocial ones. We therefore conclude that the evolution of parental provisioning allowed species to overcome the seemingly insurmountable energetic constraint on growing large brains, which in turn enabled bird species to increase survival and population stability. Because including adult eco- and socio-cognitive predictors only marginally improved the explanatory value of our models, these findings also suggest that the traditionally assessed cognitive abilities largely support successful parental provisioning. Our results therefore indicate that the cognitive adaptations underlying successful parental provisioning also provide the behavioral flexibility facilitating reproductive success and survival.</dcterms:abstract>
<dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2023-01-16T13:00:05Z</dcterms:available>
<dc:creator>van Schaik, Carel P.</dc:creator>
<dc:contributor>Graber, Sereina M.</dc:contributor>
<dc:language>eng</dc:language>
<dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/59729/1/Griesser_2-10w3di2s8f1od5.pdf"/>
<dc:contributor>Griesser, Michael</dc:contributor>
<dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/43615"/>
</rdf:Description>
</rdf:RDF>

Yes
Yes