On being the right size: food-limited feedback on optimal body size.
On being the right size: food-limited feedback on optimal body size.
复制标题
关于保持合适的体型：食物限制对最佳体型的反馈。
DOI：
--
复制
发表时间：
2008
影响因子：
4.8
通讯作者：
Parkes John P
中科院分区：
文献类型：
--
作者：
Sinclair Anthony R E;Parkes John P
1896年，一群孤立的白尾鹿Odocoileus virginianus被引入魁北克的无捕食者的Anticosti岛，引起了植物群落的长期变化。食物质量下降，体重也下降。虽然不同的繁殖参数发生了变化，但总体繁殖率保持相似，从而保持了鹿的密度，并促进了栖息地的进一步变化。这些结果表明：（i）对承载能力的长期反馈，（ii）减少体重的机制，以及（iii）在高密度下缺乏强烈的生殖率降低以调节种群，这是真兽目动物的一个特征。它们与决定脊椎动物体型进化的机制有关。
An insular population of white-tailed deer Odocoileus virginianus introduced in 1896 to predator-free Anticosti Island, Quebec, has caused long-term changes in the plant community. Food quality declined as did body weight. Although different parameters of reproduction changed, overall reproductive rates remained similar, thus maintaining deer density and promoting further change in habitat. These results show (i) long-term feedbacks on carrying capacity, (ii) the mechanism for reduction of body mass, and (iii) the lack of strong reduction in reproductive rates to regulate the population at high density, a feature of Eutherians. They are relevant to mechanisms determining the evolution of vertebrate body sizes.