NDLI: Behavioural effects of cadmium (Cd) in free-living willow ptarmigan (Lagopus lagopus)

Content Provider	Springer Nature Link
Author	Pedersen, Hans Chr. Lorås, Asgeir Andersen, Rolf A. Jenssen, Bjørn M.
Copyright Year	2009
Abstract	The objective of this study was to examine effects of sublethal cadmium (Cd) contamination on parental behaviour and chick survival in willow ptarmigan (Lagopus lagopus) in an area that does not have high environmental levels of Cd due to geology but have high environmental levels of Cd due to anthropogenic deposition and acidification. One group of willow ptarmigan hens were exposed to Cd (83.2 mg Cd/L) after egg-laying using osmotic minipumps; whereas, another group given saline served as a control. No statistically significant difference in Cd concentration between the two groups was found. There was a significant correlation between the Cd concentrations in the liver and kidney of the birds and between Cd and metallothionein (MT) concentration in the kidney. No significant differences were found between the control hens and the Cd-contaminated hens with respect to any of the behaviour parameters. Age seemed to be more important than Cd treatment as adult hens showed more distraction display, had lower flushing distance, and higher brood attendance than juveniles. There were no difference in chick survival between Cd-contaminated and control hens, and there was no correlation between Cd concentrations and chick survival. The non-significant effects of Cd concentrations on parental behaviour may be due high environmental levels of Cd caused by anthropogenic deposition and acidification. We suggest that willow ptarmigan in the area have gradually evolved abilities to cope with high environmental levels of Cd, for instance, by binding Cd to MT in kidney and liver. This may suggest that Cd exerts a strong selection pressure on birds causing a relatively rapid evolution of protection mechanisms.
Starting Page	141
Ending Page	150
Page Count	10
File Format	PDF
ISSN	16124642
Journal	European Journal of Wildlife Research
Volume Number	56
Issue Number	2
e-ISSN	14390574
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-07-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Heavy metals Pollution Alpine ecosystems Behaviour Norway Animal Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics Management, Monitoring, Policy and Law Nature and Landscape Conservation

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Metallothionein levels in willow ptarmigan (Lagopus lagopus) populations with different natural loads of cadmium

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