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原文連結
論文資訊
- 類型：已發表論文
- 日期：2012
摘要
Theoretical and empirical studies of life history aim to account for resource allocation to the different components of fitness: survival, growth, and reproduction. The pioneering 演化ary ecologist David Lack [(1968) Ecological 適應s for Breeding in Birds (Methuen and Co., London)] suggested that reproductive output in birds reflects 適應 to environmental factors such as availability of food and risk of predation, but subsequent studies have not always supported Lack's interpretation. Here using a dataset for 980 bird 物種 (Dataset S1), a phylogeny, and an explicit measure of reproductive productivity, we test predictions for how mass-specific productivity varies with body size, phylogeny, and lifestyle traits. We find that productivity varies negatively with body size and energetic demands of par
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