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Variation of heavy metals within and among feathers of birds of prey: effects of molt and external contamination.
Can Excrement and Feathers of Nestling Songbirds Be Used as Biomonitors for Heavy Metal Pollution?
- T. Dauwe, L. Bervoets, R. Blust, R. Pinxten, M. Eens
- Environmental ScienceArchives of environmental contamination and…
- 1 November 2000
It is concluded that excrement of great and blue tit nestlings can be used as a biomonitor for heavy metals (lead, cadmium, arsenic, and copper), whereas feathers appear only to be suitable for lead pollution.
Shield Characteristics Are Testosterone-Dependent in Both Male and Female Moorhens
In the moorhen, moorhens implanted with testosterone had higher intensities of ectoparasite infestations than control birds, but other indirect measures of immunocompetence did not differ significantly between the two categories of birds.
Great and blue tits as indicators of heavy metal contamination in terrestrial ecosystems.
- M. Eens, R. Pinxten, R. Verheyen, R. Blust, L. Bervoets
- Environmental Science, BiologyEcotoxicology and environmental safety
- 1 September 1999
It is suggested that tit (Parus) species, which have been important models in behavioral and ecological research, may be very useful as biomonitors for local contamination.
Effects of heavy metal exposure on the condition and health of nestlings of the great tit (Parus major), a small songbird species.
The importance of exogenous contamination on heavy metal levels in bird feathers. A field experiment with free-living great tits, Parus major.
- V. Jaspers, T. Dauwe, R. Pinxten, L. Bervoets, R. Blust, M. Eens
- Environmental ScienceJournal of environmental monitoring : JEM
It is suggested that concentrations of most heavy metals build up with increasing age of the feather, indicating that exogenous contamination may be an important source of heavy metals in feathers.
Male song as a cue for mate choice in the European starling
This study looked at individual differences in song characteristics between males of the European starling, and related song behaviour to factors such as male age, pairing date, polygyny and male breeding success, and experimentally tested whether song has an effect on female mating decisions.
Opposite Changes in Plasma Testosterone and Corticosterone Levels Following a Simulated Territorial Challenge in Male Great Tits
A role for B rather than T in the regulation of territorial defence in male great tits is suggested, which does not agree with the predictions of the 'challenge hypothesis' that males exposed to a territorial challenge while having breeding baseline T levels will respond with an increase in T or that T correlates with the intensity of aggression during a challenge.
Extra-pair paternity and intraspecific brood parasitism in the European starling, Sturnus vulgaris: evidence from DNA fingerprinting
- R. Pinxten, O. Hanotte, M. Eens, R. Verheyen, A. Dhondt, T. Burke
- BiologyAnimal Behaviour
- 1 April 1993
There was no significant evidence that polygynous males suffer from a higher risk of being cuckolded than monogamous males and indeed only one case was detected by DNA fingerprinting.