Effect of habitat, date of laying and density on clutch size of the Great Tit Parus major in northern Finland

• Published in: Ecography
• Main Authors: Orell, Markku, Ojanen, Mikko
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1983
• Subjects: Ecology, Evolution, Behavior and Systematics; Parus; Taskila; Northern Finland
• Online Access: http://dx.doi.org/10.1111/j.1600-0587.1983.tb01237.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0587.1983.tb01237.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0587.1983.tb01237.x

The sizes of 1034 Great Tit clutches were studied at the Oulu area (c. 65°N, 25°30′E) in northern Finland. The average size was 9.86 eggs in the first clutch and 7.51 in the second in 13 study areas. The decrease in clutch size from the first to the second laying was most pronounced in those females...