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Long term effects of cormorant predation on fish communities and fishery in a freshwater lake
Cormorant impact upon natural fish populations has long been debated but little studied because of the requirements of sound data that are often hard to fill. In this study I have monitored fishExpand
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Population trends for Swedish breeding birds
We have assessed the population trends for the 255 bird species breeding in Sweden (including distinct subspecies), based on data for the last 30 and 10 years, respectively. Over the past 30 yearsExpand
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Effects of Great Cormorant Predation on Fish Populations and Fishery
The strong increase in number of Great cormorants Phalacrocorax carbo in Sweden in recent years has led to conflicts - particularly with fishery. This thesis focuses on the possible effects ofExpand
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Status of the breeding population of Great Cormorants in Sweden in 2012
To be cited as: Engström, H. & Wirdheim, A. 2013: Status of the breeding population of Great Cormorants in Sweden in 2012. – In: Bregnballe, T., Lynch, J., ParzGollner, R., Marion, L., Volponi, S.,Expand
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The occurrence of the Great Cormorant Phalacrocorax carbo in Sweden , with special emphasis on the recent population growth
HENRI ENGSTRÖM The population of Great Cormorants Phalacrocorax carbo sinensis in Sweden has increased considerably in size during recent decades and currently Sweden holds about a quarter of theExpand
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The occurrence of the Great Cormorant Phalacrocorax carbo sininsis in Sweden with special emphasise on the recent population growth.
The occurrence of the Great Cormorant Phalacrocorax carbo sininsis in Sweden with special emphasise on the recent population growth.
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Absence of haematozoa and ectoparasites in a highly sexually ornamented species, the Crested Auklet
We studied the prevalence of hematozoa/ectoparasites of Crested Auklets (Aethia cristatella) at Talan Island in the northwestern Sea of Okhotsk, Russia to investigate whether individual differencesExpand
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Postweaning behaviour in pups of the southern elephant seal (Mirounga leonina) on South Georgia
After weaning, southern elephant seal pups (Mirounga leonina) fast for 3 – 8 weeks, for largely unknown reasons. During the postweaning fast we observed daytime behaviour and movements of pups onExpand
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