Variability of clutch size in Cormorant (Phalacrocorax carbo sinensis) at the Jeziorsko Reservoir (Central Poland) in 2004

• Authors: Piotr Minias , Krzysztof Kaczmarek , Anna Kleszcz , Maciej Rakowski , Tomasz Janiszewski

Abstracts

EN

The analysis of the clutch size variability in Cormorant (P. carbo sinensis) was based
on study results in colony at the “Jeziorsko Reservoir” (central Poland) in 2004. There were used
328 broods controlled 3-5 times in the season. Number of eggs in a single clutch ranged from
1 to 7, although Cormorants mostly laid 3 to 5 eggs. Mean clutch size was 3.80 (SD = 1.0 0). The
size of clutch depended on time of laying eggs and the part of colony where the nest with brood
was localised. The clutch size was bigger for pairs that started laying eggs earlier and lower for
birds bred in the part of colony where the number of nests and their density were low.

Keywords

EN

clutch size; Cormorant; Central Poland

• Publisher: Wydawnictwo Uniwersytetu Łódzkiego
• Journal: Acta Universitatis Lodziensis. Folia Biologica et Oecologica
• Year: 2008
• Volume: 4

Dates

published

2008

Contributors

author

Piotr Minias

author

Krzysztof Kaczmarek

author

Anna Kleszcz

author

Maciej Rakowski

author

Tomasz Janiszewski

other

Students’ Ornithological Section Piotr Minias - University of Łódź

other

Krzysztof Kaczmarek - Medical University of Łódź

other

Students’ Ornithological Section Anna Kleszcz - University of Łódź

other

Students’ Ornithological Section Maciej Rakowski - University of Łódź

other

Department of Teacher Training and Biodiversity Studies Tomasz Janiszewski - University of Łódź

Identifiers

URI

http://hdl.handle.net/11089/12332