?? ???????????? ?????????????????????????????? ???????????????? ????????????????, ???????????????????? ?????????????? ??????????????????????, ???????????????? ?? ???????? ???????????????? ?????????????? (Phalacrocorax carbo) ?? ?????????????????????? ?????????????????????? ???????? ?????????????????????????? ?????????????????????? ??????????????????????. ?????????????????????? ?????????????? ?????????? ??????????????????????, ???????????????????? ?????????????????? ?? ???????????????????? ?????????????? ???????????????? ?????????????? ???? ???????????? ???????? ????????. ???????????????????????? ?????????????????????? ???????????? ???? ???????????????? ??????????????????????, ?????????????????? ??????????????, ???????????? ??????????????????????, ?????????????????? ?? ????????????????. ?????????????? ???????????????????????????? ??????????????????????, ?????????????????????? ???? ???????????????? ?????????????????????? ?? ?????????? ???????????????????? ???????????????????? ?????????????? ???????????????? ?????????????? ???? ?????????????????????? ???????????? ????????. ???????????? ?????????????????????? ?? ?????????????????????? ?? ???????????????????? ?????????????? ?????????????? ???????? ?? ???? ???????????????? ???????? ?????????????? ???? ???????????????????? ?????????????????????????? ?????????????????????? ?????????????????????? ?? 1984-2004 ????.

This paper presents extended material on the breeding history, biology and role of Great Cormorant (Phalacrocorax carbo) in poly species communities of birds on islands of the Black Sea Biosphere Reserve. Reasons of increasing numbers of this species, interspecies relations, and problems of negative effects caused by Great Cormorant on other bird species are analyzed. The long-term data represent number dynamics, structure of colonies, reproductive indices, migrations and winterings. The paper also describes biotechnical measures carried out on the reserved islands in order to decrease the negative impact of Great Cormorant which it brings on breeding of other birds. The research was carried out in Tendrovsky and Yagorlytsky Bays of the Black Sea and their islands in the territory of the Black Sea Biosphere Reserve from 1984 to 2004.