Effects of the doubly labelled water procedure on Great Tits Parus major feeding young

Shelley A. Hinsley, Paul E. Bellamy, Peter Rothery, Paula Redman, Lindsay Furness, John R. Speakman

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Capsule Female feeding rate behaviour was highly variable between individuals but no effect of the doubly labelled water (DLW) procedure on female visit rate was detected, whereas visit rates by males, which were neither trapped or manipulated, increased following trapping and manipulation of their partners. Aims To test the assumption that the subject's behaviour is normal during the measurement period when using DLW to measure energy expenditure. Methods Visits to the nestbox by parents feeding young were counted separately for females and males on the day before and the day after the female only was trapped to measure her energy expenditure using DLW. Visit rates were also counted for control pairs. Results Female visit rates did not differ before and after manipulation, or between experimental and control pairs, but bird behaviour was highly variable between individuals. In contrast, the visit rates of both experimental and control males, which were not trapped, increased on the second day. Conclusion The results for female behaviour supported the assumption of normality, but a small subset of particular individuals may be prone to adverse reactions. The response of the males may have been a reaction to disturbance at the nest.

Original languageEnglish
Pages (from-to)151-159
Number of pages9
JournalBird Study
Volume58
Issue number2
DOIs
Publication statusPublished - 23 Feb 2011

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Nature and Landscape Conservation

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