Regular counts of wintering waterfowl have been undertaken as a part of the International Waterfowl Census (IWC) and the National Swedish Environmental Monitoring Program since 1964. After the first years, a network of annually surveyed sites was established for the calculation of annual indices. Country-wide surveys (also including aerial counts) were undertaken 1971–1974, 1987–1989, 1992–1993...

Conflict arises in fisheries worldwide when piscivorous birds target fish species of commercial value. This paper presents a method for estimating size selectivity functions for piscivores and uses it to compare predation selectivities of Great Cormorants (Phalacrocorax carbo sinensis L. 1758) with that of gill-net fishing on a European perch (Perca fluviatilis L. 1758) population in the Curoni...

The article presents the history of nesting, disappearance from fauna and current spatial distribution Great Cormorant (Phalacrocorax carbo L., 1758) breeding colonies in Baikal Siberia. main research sites were Selenga River Delta, Strait Maloye More islands Chivyrkuy Bay, Upper Angara Bay on Lake; Barguzin hollows, Gusinoe Lake Pribaikalye Transbaikalye, where this species once lived accordin...

This is the first study on diet of Great Cormorant wintering in Algeria. It carried out Beni Haroun, largest dam lake country, north-east The trophic menu Phalacrocorax carboin this based four species fish; Abramis bramas, Carassius carassius, Barbus barbus and Cyprinus carpio. However, carassius represent two most important Cormorant’s diet. total consumed biomass 155,364.18 g, average contain...

Capsule Great Cormorants Phalacrocorax carbo sinensis use vocal communication during the breeding season, with males being particularly earlier in cycle and showing individual variation some calls, which could be used for recognition.Aims To identify describe behaviour of Cormorants, to link calls observed behaviours explore if had potential recognition.Methods We followed 21 nesting pairs by v...

Abstract Perch (Perca fluviatilis) is an important prey species of the great cormorant (Phalacrocorax carbo sinensis) in coastal waters northern Baltic Sea. The annual predation mortality caused by cormorants was estimated based on consumed numbers perch relation to abundance vulnerable age groups sea. We used existing stock assessment data (Archipelago Sea) or a simple population model other a...