Testosterone in the breeding cycle of the male red-backed shrike lanius collurio

L. Fornasari, L. Bottoni, H. Schwabl, R. Massa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The concentration of plasma testosterone was studied in a number of territorial male Red-backed Shrikes, Lanius collurio, during a breeding season in the Italian Pre-AJps. Testosterone levels were highest at the time of the birds’ arrival and declined abruptly after a few days. This indicates that high levels of circulating testosterone are needed to sustain aggressive motivation while much lower levels may be sufficient for sexual behaviour in this species. Moreover, it also appears that males of Red-backed Shrikes have very high testosterone blood levels well before they gain their breeding sites.

Original languageEnglish
Pages (from-to)193-196
Number of pages4
JournalEthology Ecology and Evolution
Volume4
Issue number2
DOIs
Publication statusPublished - 1992

Fingerprint

testosterone
reproductive cycle
breeding
sexual behavior
breeding site
breeding season
breeding sites
blood
bird
plasma
well
Lanius collurio
birds

Keywords

  • Aggression
  • Breeding season
  • Red-backed Shrike
  • Testosterone

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Testosterone in the breeding cycle of the male red-backed shrike lanius collurio. / Fornasari, L.; Bottoni, L.; Schwabl, H.; Massa, R.

In: Ethology Ecology and Evolution, Vol. 4, No. 2, 1992, p. 193-196.

Research output: Contribution to journalArticle

Fornasari, L. ; Bottoni, L. ; Schwabl, H. ; Massa, R. / Testosterone in the breeding cycle of the male red-backed shrike lanius collurio. In: Ethology Ecology and Evolution. 1992 ; Vol. 4, No. 2. pp. 193-196.
@article{a1445b7d933b44249dbc0e433da46ab0,
title = "Testosterone in the breeding cycle of the male red-backed shrike lanius collurio",
abstract = "The concentration of plasma testosterone was studied in a number of territorial male Red-backed Shrikes, Lanius collurio, during a breeding season in the Italian Pre-AJps. Testosterone levels were highest at the time of the birds’ arrival and declined abruptly after a few days. This indicates that high levels of circulating testosterone are needed to sustain aggressive motivation while much lower levels may be sufficient for sexual behaviour in this species. Moreover, it also appears that males of Red-backed Shrikes have very high testosterone blood levels well before they gain their breeding sites.",
keywords = "Aggression, Breeding season, Red-backed Shrike, Testosterone",
author = "L. Fornasari and L. Bottoni and H. Schwabl and R. Massa",
year = "1992",
doi = "10.1080/08927014.1992.9525341",
language = "English",
volume = "4",
pages = "193--196",
journal = "Ethology Ecology and Evolution",
issn = "0394-9370",
publisher = "Taylor and Francis Ltd.",
number = "2",

}

TY - JOUR

T1 - Testosterone in the breeding cycle of the male red-backed shrike lanius collurio

AU - Fornasari, L.

AU - Bottoni, L.

AU - Schwabl, H.

AU - Massa, R.

PY - 1992

Y1 - 1992

N2 - The concentration of plasma testosterone was studied in a number of territorial male Red-backed Shrikes, Lanius collurio, during a breeding season in the Italian Pre-AJps. Testosterone levels were highest at the time of the birds’ arrival and declined abruptly after a few days. This indicates that high levels of circulating testosterone are needed to sustain aggressive motivation while much lower levels may be sufficient for sexual behaviour in this species. Moreover, it also appears that males of Red-backed Shrikes have very high testosterone blood levels well before they gain their breeding sites.

AB - The concentration of plasma testosterone was studied in a number of territorial male Red-backed Shrikes, Lanius collurio, during a breeding season in the Italian Pre-AJps. Testosterone levels were highest at the time of the birds’ arrival and declined abruptly after a few days. This indicates that high levels of circulating testosterone are needed to sustain aggressive motivation while much lower levels may be sufficient for sexual behaviour in this species. Moreover, it also appears that males of Red-backed Shrikes have very high testosterone blood levels well before they gain their breeding sites.

KW - Aggression

KW - Breeding season

KW - Red-backed Shrike

KW - Testosterone

UR - http://www.scopus.com/inward/record.url?scp=0038330694&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038330694&partnerID=8YFLogxK

U2 - 10.1080/08927014.1992.9525341

DO - 10.1080/08927014.1992.9525341

M3 - Article

VL - 4

SP - 193

EP - 196

JO - Ethology Ecology and Evolution

JF - Ethology Ecology and Evolution

SN - 0394-9370

IS - 2

ER -