Aspects of the biology of the shag (Palacrocorax aristotelis)
On the Isle of May, Scotland, large numbers of Shags have been marked annually since 1962. From 1981 to 1983, this marked population was sampled to investigate retrospectively a catastrophic decline in numbers of breeding Shags between 1974 and 1976. An electrolytic method was developed to read inco...
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Durham University
1985
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353866 |