Size Selectivity in Summer and Winter Diets of Great Cormorant (Phalacrocorax carbo ): Does it Reflect Season-Dependent Difference in Foraging Efficiency?

@inproceedings{ech2008SizeSI,
  title={Size Selectivity in Summer and Winter Diets of Great Cormorant (Phalacrocorax carbo ): Does it Reflect Season-Dependent Difference in Foraging Efficiency?},
  author={Martin {\vC}ech and Pavel {\vC}ech and Jan Kube{\vc}ka and Marie Prchalov{\'a} and Vladislav Dra{\vs}t{\'i}k},
  year={2008}
}
Abstract Diet of the Great Cormorant (Phalacrocorax carbo) was studied using regurgitated pellets, individual fish bones and fish remains collected from below roosting trees at Želivka and Slapy Reservoirs, Czech Republic, during summer, a warm winter and a cold winter. Both reservoirs have the same trophic status and similar fish assemblages. Using diagnostic bones (os pharyngeum, dentale, praeoperculare) and our own linear regression equations relating dimensions of the diagnostic bone and… 

Seasonal Shifts in Diet Composition of Great Cormorants Phalacrocorax carbo sinensis foraging at a Shallow Eutrophic Inland Lake

The diet of Great Cormorants Phalacrocorax carbo sinensis at Lake Dümmer was analysed by collecting 562 regurgitated pellets over a period of one year, finding substantial differences in frequency, composition and size of prey fish species.

Winter diet of great cormorant (Phalacrocorax carbo) on the River Vltava: estimate of size and species composition and potential for fish stock losses

Most probably, both great cormorants and anglers are responsible for the decrease in catches of brown trout and grayling from the River Vltava in Vyšší Brod.

Great Cormorants Phalacrocorax carbo feed on larger fish in late winter

Fisheries management should reflect on the fact that competition for larger-sized fish is the highest in late winter and in early spring, and stocking of potentially vulnerable fish could be delayed to the time when overwintering birds leave the area and recreational fishing could be restricted in latewinter.

Selective predators or choosy fishermen? Relation between fish harvest, prey availability and great cormorant (Phalacrocorax carbo sinensis) diet

It is concluded that potential effects of cormorants on commercially important fish will mainly depend on habitat type (fish ponds, natural deep lakes, others), and that in the natural lakes in Lombardy c Cormorants mainly concentrate on species which are of limited value for commercial fishing.

Differences in the diet of breeding Cormorants Phalacrocorax carbo sinensis in an inland colony: the effect of years, breeding stages and locations within the colony

The impact of Great Cormorants on native fish assemblages may be dependent on the location within the colony, development state of the chicks and season, not just fish availability.

Cormorant diet in relation to temporal changes in fish communities

The stomach contents of 229 great cormorants shot between March and October 2009 along the Swedish east coast were analysed for differences in diet between gender, age, and breeding phase, suggesting no major shift in diet over the breeding season.

Fish Predation by the Great Cormorant (Phalacrocorax carbo sinensis)

The diet of a piscivorus top predator, the Great Cormorant (Phalacrocorax carbo sinensis), in the Baltic Sea is examined at two coastal locations, in the Bothnian Sea and in theBaltic Proper, to enable evaluation of its uses and applications.

Natural Regulation of the Baltic Population of the Great Cormorant Phalacrocorax carbo sinensis: The Interplay between Winter Severity and Density Dependence

After a period of continuous increase and range expansion, the Baltic Great Cormorant population has stabilised in large parts of its range in recent years. Ringing recoveries reveal that

Do Cormorants and Recreational Anglers Take Fish of the Same Species and Sizes?

The Great Cormorant Phalacrocorax carbo is a widespread piscivorous waterbird. The competition for resources between recreational anglers and Cormorants has been causing serious conflicts between

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