Sexing Red-necked Grebes Podiceps grisegena by molecular techniques and morphology

Kloskowski, Janusz; Grela, Przemysław; Krogulec, Jarosław; Gaska, Michał; Tchórzewski, Marek

doi:10.3161/068.041.0203

Skip to main menu
Skip to search engine
Skip to content
Skip to footer

This publication is protected by copyright. Access to its digital version is possible on computer terminals in the institution that shares it.

Title: Sexing Red-necked Grebes Podiceps grisegena by molecular techniques and morphology

Abstract:

Sexual size dimorphism was analysed in the Red- necked Grebe in southeast Poland. A DNA-based procedure was utilised to sex individuals and to assess the accuracy of morphological criteria for the sex identification of adult breeding birds: discriminant analysis on the sample level and within-pair comparisons. Males were significantly larger than females in all body measurements used in the discriminant function selection process. Owing to considerable overlap in measurements, however, the sexes cannot be accurately separated by biometrics at the population scale. Sexual dimorphism was most pronounced in bill length measured from the corner of the gape to the tip, but only 79% of individuals were correctly identified on the basis of this parameter alone. When two variables, bill length and wing length, were combined, the discriminant function was of similar efficiency (80%) in determining the sex. The accuracy level of sexing may be improved by comparing mates within pairs: combined comparisons of bill length and body mass were as accurate as the genetic technique, but sex assignment was restricted to 76% of the measured pairs.

Relation:

Acta Ornithologica

Volume:

Issue:

Start page:

176

End page:

180

Detailed Resource Type:

Journal

Format:

text/xml

Resource Identifier:

oai:rcin.org.pl:55611 ; 10.3161/068.041.0203

Source:

MiIZ PAN, call no. P.257 ; MiIZ PAN, call no. P.4568 ; click here to follow the link

Language:

eng

Language of abstract:

pol ; eng

Rights:

Rights Reserved - Restricted Access

Terms of use:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, may be used within the limits of statutory user freedoms.

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Access:

Open

Subject and keywords:

Red-necked Grebe Podiceps grisegena sexual size dimorphism discriminant function analysis molecular sexing within-pair comparisons perkoz rdzawoszyjny

Object collections:

Last modified:

Aug 8, 2023

In our library since:

Jul 29, 2015

Number of object content downloads / hits:

All available object's versions:

https://rcin.org.pl./publication/75809

Show description in RDF format:

RDF

Show description in RDFa format:

RDFa

Show description in OAI-PMH format:

OAI-PMH

Acta Ornithologica
- Acta Ornithologica Musei Zoologici Polonici
- Acta Ornithologica

Edition name	Date
Short notes: Sexing Red-necked Grebes Podiceps grisegena by molecular techniques and morphology / Janusz Kloskowski, Przemysław Grela, Jarosław Krogulec, Michał Gaska & Marek Tchórzewski	Aug 8, 2023