Intersexual size and plumage differences in tree sparrows (Passer montanus) - a morphological study based on molecular sex determination

F. Mónus, K. Szabó, A. Lózsa, Z. Pénzes, Z. Barta

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We investigated intersexual morphological differences in tree sparrows (Passer montanus), a species being considered as sexually monomorphic. Molecular sexing of the birds was performed by PCR amplification of the sex chromosome-linked CHD1 gene introns. All measured traits (body weight, wing, tail and tarsus length, bill size and the size of the black throat patch, i.e. badge hereafter) were greater in males than in females and the sex of about 90% of the individuals was correctly categorized by means of a discriminant analysis based on the morphological measurements. Nevertheless, wing length alone was equally good predictor of the sex. Other measured traits had only moderate discriminant value. Our results do not support that tree sparrows can be sexed based on the size of their badge alone. However, some of our results suggest intersexual differences in the function of the badge.

Original languageEnglish
Pages (from-to)269-276
Number of pages8
JournalActa Zoologica Academiae Scientiarum Hungaricae
Volume57
Issue number3
Publication statusPublished - 2011

Fingerprint

Passer montanus
sex determination
plumage
gender
throat
sex determination analysis
sex chromosomes
discriminant analysis
introns
chromosome
amplification
tail
bird
body weight
gene
birds
genes

Keywords

  • Intersexual differences
  • Morphology
  • Passer montanus
  • Sex determination
  • Tree sparrow

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

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abstract = "We investigated intersexual morphological differences in tree sparrows (Passer montanus), a species being considered as sexually monomorphic. Molecular sexing of the birds was performed by PCR amplification of the sex chromosome-linked CHD1 gene introns. All measured traits (body weight, wing, tail and tarsus length, bill size and the size of the black throat patch, i.e. badge hereafter) were greater in males than in females and the sex of about 90{\%} of the individuals was correctly categorized by means of a discriminant analysis based on the morphological measurements. Nevertheless, wing length alone was equally good predictor of the sex. Other measured traits had only moderate discriminant value. Our results do not support that tree sparrows can be sexed based on the size of their badge alone. However, some of our results suggest intersexual differences in the function of the badge.",
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AU - Szabó, K.

AU - Lózsa, A.

AU - Pénzes, Z.

AU - Barta, Z.

PY - 2011

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