Results 31 to 40 of about 4,335 (194)
Dynamic Responses in a Plant-Insect System to Fertilization by Cormorant Feces
Theoretical arguments suggest that increased plant productivity may not only increase consumer densities but also their fluctuations. While increased consumer densities are commonly observed in fertilization experiments, experiments are seldom performed ...
Gundula Kolb, Peter A. Hambäck
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Management of Double-Crested Cormorants to Improve Sport Fisheries in Michigan: Three Case Studies
Impacts of double-crested cormorants (Phalacrocorax auritus) to fisheries have been documented, but evaluation of the process and outcomes of cormorant management to reduce impacts on fisheries is lacking. We provide a synthesis of adaptive management of
Brian S. Dorr +3 more
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Double‐crested cormorants (Phalacrocorax auritus) have been identified as the source of significant mortality to juvenile salmonids (Oncorhynchus spp.) in the Columbia River Basin.
Yasuko Suzuki +4 more
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The great cormorant (Phalacrocorax carbo) is a species that alters ecosystems significantly, mainly by depositions of guano, which changes the chemical properties of soil and can lead even to deforestation as well as have a significant impact on soil ...
Mateusz Oszust, Piotr Klimaszyk
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Between March and May 2019, wildlife rehabilitation centers along coastal southern California admitted increased numbers of Brandt's cormorants (Phalacrocorax penicillatus) with neurological disease including head tilt, nystagmus, torticollis, tremors ...
Ozge Erdogan Bamac +8 more
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Aim. To research the Great Cormorant (Phalacrocorax carbo L., 1758) ecology during the secondary expansion of the Baikal region.Material and Methods. The material for studying cormorant nutrition was 28 stomachs of harvested birds, visual observations of
E. N. Yelayev +7 more
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Since 2005, great cormorants have been observed on the Lake Góreckie (Wielkopolski National Park) shoreline. The population of these birds occurring within the lake has gradually increased. In autumn 2008, more than 100 individuals were observed.
Piotr Klimaszyk +2 more
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Some observations on Seabirds breeding in the Tsitsikamma Coastal National Park.
In 1980 and 1981 more than 50 pairs of kelp gulls Lams dominicanus, 70 of Cape cormorants Phalacrocorax capensis and 20 of whitebreasted cormorants P. carbo nested in the Tsitsikamma Coastal National Park.
R. J. M Crawford
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Use of social information in seabirds: compass rafts indicate the heading of food patches. [PDF]
Ward and Zahavi suggested in 1973 that colonies could serve as information centres, through a transfer of information on the location of food resources between unrelated individuals (Information Centre Hypothesis).
Henri Weimerskirch +4 more
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The south Atlantic coast supports one of the highest assemblages of non-breeding double-crested cormorants (Nannopterum auritum) known and is a convergence area for Atlantic menhaden (Brevoortia tyrannus) during the winter months.
Bryan D. Watts +3 more
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