نتایج جستجو برای: reproductive allocation

تعداد نتایج: 175223  

2017
Carla Aimé Jean-Baptiste André Michel Raymond

Menopause, the permanent cessation of ovulation, occurs in humans well before the end of the expected lifespan, leading to an extensive post-reproductive period which remains a puzzle for evolutionary biologists. All human populations display this particularity; thus, it is difficult to empirically evaluate the conditions for its emergence. In this study, we used artificial neural networks to m...

2016
Xine Li Lili Jiang Fandong Meng Shiping Wang Haishan Niu Amy M. Iler Jichuan Duan Zhenhua Zhang Caiyun Luo Shujuan Cui Lirong Zhang Yaoming Li Qi Wang Yang Zhou Xiaoying Bao Tsechoe Dorji Yingnian Li Josep Peñuelas Mingyuan Du Xinquan Zhao Liang Zhao Guojie Wang

Organisms' life cycles consist of hierarchical stages, from a single phenological stage (for example, flowering within a season), to vegetative and reproductive phases, to the total lifespan of the individual. Yet phenological events are typically studied in isolation, limiting our understanding of life history responses to climate change. Here, we reciprocally transfer plant communities along ...

Journal: :American journal of human biology : the official journal of the Human Biology Council 2009
Meredith W Reiches Peter T Ellison Susan F Lipson Katherine C Sharrock Eliza Gardiner Laura G Duncan

Human life history contains a series of paradoxes not easily explained by classical life history theory. Although overall reproductive output is higher than in related primates, juvenile growth is slower and age-specific reproductive rates decline faster with age. A simple energetic model would predict that growth and reproductive rates should be positively correlated and that reproductive effo...

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