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1 December 2004 Faecal Escherichia coli and Chlamydophila psittaci in the Superb Lyrebird Menura novaehollandiae: Host Sex and Age Effects
Rebecca J. Milne, Aldo Poiani, Graeme Coulson, Rachel Auld
Author Affiliations +

The Superb Lyrebird is a sexually dimorphic passerine that although is not considered endangered, it has been declining in population size since the 1940s due primarily to urban development. Recent reports suggest that lyrebirds may be threatened by chlamydial infection. We studied levels of faecal infection by two microparasites in lyrebirds: Chlamydophila psittaci and Escherichia coli in the Sherbrooke Forest, south-eastern Australia. Fresh faecal samples were obtained from 33 lyrebirds (15 adult females, 13 adult males and 5 juveniles) — estimated of 27.5% of the population, all of them tested negative to Ch. psittaci. E. coli prevalence was compared between adult males and females and no difference was found. This result is expected, for instance, if E. coli is sexually transmitted and lyrebirds are promiscuous. Trends for juveniles to be more parasitized than adults were detected, but they were statistically not significant. Behavioural analyses of video footage indicate that E. coli infected birds did not allocate more or less time to any of the activities considered than did non infected birds. This might suggest that E. coli infection in lyrebirds is relatively benign, and behavioural effects may thus be subtle. No significant differences were found in specific measurements of foraging behaviour but non infected birds tended to scratch more frequently than infected birds.



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Rebecca J. Milne, Aldo Poiani, Graeme Coulson, and Rachel Auld "Faecal Escherichia coli and Chlamydophila psittaci in the Superb Lyrebird Menura novaehollandiae: Host Sex and Age Effects," Acta Ornithologica 39(2), 111-120, (1 December 2004).
Received: 1 July 2004; Accepted: 1 October 2004; Published: 1 December 2004
Chlamydophila psittaci
Escherichia coli
Menura novaehollandiae
Superb Lyrebird
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