In years 2006-2007 secondary sex ratio of blackbird nestlings in Stefan Żeromski park in Szczecin was studied. 190 nestlings were sexed by genetic analysis. Female: male ratio was found to be 1 : 0,94. No relationships were found between hatching date and sex of nestling and female age and sex of offspring.
Drugorzędowa struktura płciowa u piskląt kosa (Turdus merula)Słowa kluczowe struktura płciowa, kos, populacja miejska Streszczenie W latach 2006-2007 badano drugorzędową strukturę płciową u piskląt kosa w parku im. S. Żeromskiego w Szczecinie. Stosując analizy molekularne oznaczono płeć 190 piskląt. Stosunek samic do samców wynosił 1 : 0,94. Nie stwierdzono zależności między datą wyklucia, a płcią pisklęcia, ani pomiędzy wiekiem samicy, a płcią pisklęcia.
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