KOPS - The Institutional Repository of the University of Konstanz

Morphological sexing of passerines : not valid over larger geographical scales

Morphological sexing of passerines : not valid over larger geographical scales

Cite This

Files in this item

Checksum: MD5:2aede9817e4ff41035d2da72a10c91c1

ELLRICH, Heike, Volker SALEWSKI, Wolfgang FIEDLER, 2010. Morphological sexing of passerines : not valid over larger geographical scales. In: Journal of Ornithology. Springer. 151(2), pp. 449-458. ISSN 0021-8375. eISSN 1439-0361. Available under: doi: 10.1007/s10336-009-0478-z

@article{Ellrich2010-04Morph-51463, title={Morphological sexing of passerines : not valid over larger geographical scales}, year={2010}, doi={10.1007/s10336-009-0478-z}, number={2}, volume={151}, issn={0021-8375}, journal={Journal of Ornithology}, pages={449--458}, author={Ellrich, Heike and Salewski, Volker and Fiedler, Wolfgang} }

<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#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/51463"> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Ellrich, Heike</dc:contributor> <dcterms:title>Morphological sexing of passerines : not valid over larger geographical scales</dcterms:title> <dcterms:abstract xml:lang="eng">Sex determination of birds is important for many ecological studies but is often difficult in species with monomorphic plumage. Morphology often provides a possibility for sex determination, but the characters need to be verified. We tested whether five passerine species can be sexed according to standard morphological measurements applying a forward logistic regression with sex determined by molecular analysis as the dependent variable. Furthermore, we tested whether the results can be used on a larger geographic scale by applying morphological sexing methods gained by similar studies from other regions to our data set. Of the five species of this study only Garden Warblers Sylvia borin could not be sexed morphologically. In the Robin Erithacus rubecula, 87.2% of all individuals were sexed correctly. For Reed Warblers Acrocephalus scirpaceus, Willow Warblers Phylloscopus trochilus and Reed Buntings Emberiza schoeniclus, the respective values were 77.6, 89.4 and 86.4%. When the logistic regression functions from similar studies on Robins and Reed Buntings in Denmark and Scotland were applied to the birds from south-western Germany, they performed less well compared to the original dataset of these studies and compared to the logistic regression function of our own study. The same was the case for Willow Warblers when a wing length criterion used in Great Britain was applied to the birds of our study. These discrepancies may have several explanations: (1) the models are optimised for the dataset from which they were extracted, (2) inter-ringer variation in measurements, (3) the use of different age cohorts, (4) different morphology due to different habitat availability around the study site, or, most likely, (5) different morphology due to different migratory behaviour. We recommend that morphological sex differentiation methods similar to this study (1) be only used population specific, (2) only with one age cohort and (3) to adjust the extracted equations from time to time.</dcterms:abstract> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Ellrich, Heike</dc:creator> <dc:language>eng</dc:language> <dc:contributor>Salewski, Volker</dc:contributor> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/51463/1/Ellrich_2-1l8xcmaey8q3i6.pdf"/> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/28"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2020-10-26T10:22:42Z</dcterms:available> <dc:contributor>Fiedler, Wolfgang</dc:contributor> <dc:creator>Salewski, Volker</dc:creator> <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/> <dc:rights>terms-of-use</dc:rights> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/28"/> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/51463/1/Ellrich_2-1l8xcmaey8q3i6.pdf"/> <dcterms:issued>2010-04</dcterms:issued> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2020-10-26T10:22:42Z</dc:date> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/51463"/> <dc:creator>Fiedler, Wolfgang</dc:creator> </rdf:Description> </rdf:RDF>

Downloads since Oct 26, 2020 (Information about access statistics)

Ellrich_2-1l8xcmaey8q3i6.pdf 39

This item appears in the following Collection(s)

Search KOPS


My Account