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Variation of heavy metals within and among feathers of birds of prey: effects of molt and external contamination.
The concentration of Hg was significantly higher in feathers molted first, suggesting that levels in feathers reflect levels in the blood during formation, and that external contamination may have an important impact on the levels detected in the feathers. Expand
Can Excrement and Feathers of Nestling Songbirds Be Used as Biomonitors for Heavy Metal Pollution?
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. Expand
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. Expand
Great and blue tits as indicators of heavy metal contamination in terrestrial ecosystems.
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. Expand
Effects of heavy metal exposure on the condition and health of nestlings of the great tit (Parus major), a small songbird species.
The results showed that nestlings were indeed exposed to large amounts of heavy metals, and nestling body mass and condition were significantly reduced at the most polluted site. Expand
Accumulation, tissue-specific distribution and debromination of decabromodiphenyl ether (BDE 209) in European starlings (Sturnus vulgaris).
Results are the first indications for the debromination of BDE 209 in birds and other PBDE congeners, particularly octa- and nonaBDEs, were also present in the muscle and liver, suggesting bioformation from BDE209. Expand
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. Expand
The importance of exogenous contamination on heavy metal levels in bird feathers. A field experiment with free-living great tits, Parus major.
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. Expand
Male song as a cue for mate choice in the European starling
This study had two aims. First, we looked at individual differences in song characteristics between males of the European starling, and we related song behaviour to factors such as male age, pairingExpand
Extra-pair paternity and intraspecific brood parasitism in the European starling, Sturnus vulgaris: evidence from DNA fingerprinting
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. Expand