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(1991) Swennen, Cornelis
Eiders Somateria mollissima have expanded their range and their numbers have increased dramatically during the last two centuries. This study analyses the situation for Eiders in The Netherlands. Eider colonies in the Dutch Waden Sea settled with one or a few pairs. Their starting phase with numbers of less than 10, lasted 5 to 20 years in the various colonies. ...
Zie: Summary
Gebruik a.u.b. deze link om te verwijzen naar dit
document:
http://irs.ub.rug.nl/ppn/081443501 |
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