Licensed control does not reduce local Cormorant Phalacrocorax carbo population size in winter
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چکیده
منابع مشابه
In-air hearing of the great cormorant (Phalacrocorax carbo)
Many aquatic birds use sounds extensively for in-air communication. Regardless of this, we know very little about their hearing abilities. The in-air audiogram of a male adult great cormorant (Phalacrocorax carbo) was determined using psychophysical methods (method of constants). Hearing thresholds were derived using pure tones of five different frequencies. The lowest threshold was at 2 kHz: 1...
متن کاملRelationships between bird morphology and prey selection in two sympatric Great Cormorant Phalacrocorax carbo subspecies during winter
Fonteneau et al. – 2009 – Relationships between bird morphology and prey selection in two sympatric Great Cormorant Phalacrocorax carbo subspecies during winter. Abstract Variation in bird morphology (notably sex size dimorphism) has been suggested to contribute to differences in food use between individuals. We explore the hypothesis of food partitioning (diet overlap and prey size selection) ...
متن کاملPrey detection by great cormorant (Phalacrocorax carbo sinensis) in clear and in turbid water.
The scattering and absorption of light by water molecules and by suspended and dissolved matter (turbidity) degrade image transmission and, thus, underwater perception. We tested the effects on visual detection of prey size and distance (affecting apparent prey size) and of low-level water turbidity in hand-reared great cormorants (Phalacrocorax carbo sinensis) diving for natural prey (fish) in...
متن کاملScreening of protozoan and microsporidian parasites in feces of great cormorant (Phalacrocorax carbo)
The global population of great cormorants (Phalacrocorax carbo L.) is on the rise. These birds, characterized by rapid metabolism, can deposit large quantities of feces, and because they breed on the land but forage on water, both terrestrial and aquatic environments can be simultaneously affected by their activities. The contribution of great cormorants in the dispersal of bacterial and viral ...
متن کاملCadmium and lead concentrations in Contracaecum rudolphii (Nematoda) and its host, the cormorant Phalacrocorax carbo (Aves).
There are a variety of ways to assess the environmental impacts on parasites (Lafferty D. 1997: Parasitol. Today 13: 251-255). Recent studies on endoparasites of fish have revealed that several helminths (mainly acanthocephalans, and to a lesser degree tapeworms) from the intestine of their definitive hosts bioconcentrate heavy metals above the values detected in host tissues (review in Sures B...
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ژورنال
عنوان ژورنال: Journal of Ornithology
سال: 2013
ISSN: 2193-7192,2193-7206
DOI: 10.1007/s10336-013-0938-3