Seasonal Changes in Clutch Size in British Birds
Journal of Animal Ecology1993Vol. 62(2), pp. 263–263
Citations Over TimeTop 10% of 1993 papers
Abstract
In many species of birds the mean clutch size is not constant through the breeding season: Some species show a seasonal pattern of declining clutch size, while others can show a mid-season peak. We suggest an evolutionary interpretation of the different patterns of seasonal change in birds, and test predictions by analysis of nest-record data held by the British Trust for Ornithology (BTO). We assume that conditions for breeding will show a seasonal pattern of improvement and then decline, and that the optimal clutch size (Lack 1947) is larger for each individual in the population when the conditions for breeding are better
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