Micronuclei and nuclear abnormalities in peripheral blood erythrocytes of penguins "Pygoscelis papua". "A" – "budding" nucleus ("broken egg"-type), "B" – "tailed" nucleus (nucleus with protrusion); "C" – two-lobed nucleus; "D" – erythrocyte amitosis. Blood samples were made by Assist. Prof. Dr. Vladimir Bezrukov, Taras Shevchenko National University of Kyiv, in 2003-2004 during VIII Ukrainian Antarctic expedition (Gentoo Penguin Colony, Petermann island, 65°10'S, 64°10'W).