Geographic variation in life-history traits: growth season affects age structure, egg size and clutch size in Andrew's toad (Bufo andrewsi).
Geographic variation in life-history traits: growth season affects age structure, egg size and clutch size in Andrew's toad (Bufo andrewsi).
复制标题
生活史特征的地理差异：生长季节影响安德鲁蟾蜍（Bufo andrewsi）的年龄结构、卵大小和产卵量
DOI：
10.1186/s12983-016-0138-0
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发表时间：
2016
影响因子：
2.8
通讯作者：
Jehle R
中科院分区：
文献类型：
--
作者：
Liao WB;Luo Y;Lou SL;Lu D;Jehle R
与季节长度相关的环境变化可能会促进生活史性状的分化，但在自然种群中的外温动物研究很少。研究了横断山区不同纬度和海拔地区17个安氏蟾蜍（Bufo andrewsi）种群的卵大小、窝卵数、性成熟年龄、最大年龄、平均年龄、生长速率和成体大小随生长季节长度的变化规律。我们发现，卵子大小、性成熟年龄和平均年龄随着生长季节长度的减少而增加，而窝卵数则表现出匡威的倾向。身体大小并没有随着生长季节长度的减少而增加，但与一生的活动（即一生中活动的估计天数）密切相关。男性和女性在其模式的地理变化的增长率，这可能是力量的结果，塑造生长和繁殖之间的权衡在不同的环境。我们的研究结果表明，生长季节在塑造B的生活史特征的变化中起着重要的作用。andrewsi跨越地理梯度。本文的在线版本（doi：10.1186/s12983-016-0138-0）包含补充材料，可供授权用户使用。
Environmental variation associated with season length is likely to promote differentiation in life-history traits, but has been little studied in natural populations of ectotherms. We investigated patterns of variation in egg size, clutch size, age at sexual maturity, maximum age, mean age, growth rate and adult body size in relation to growth season length among 17 populations of Andrew’s toad (Bufo andrewsi) at different latitudes and altitudes in the Hengduan Mountains, western China. We found that egg size, age at sexual maturity, and mean age increased with decreasing length of the growth season, whereas clutch size showed a converse cline. Body size did not increase with decreasing length of the growth season, but was tightly linked to lifetime activity (i.e. the estimated number of active days during lifetime). Males and females differed in their patterns of geographic variation in growth rates, which may be the result of forces shaping the trade-off between growth and reproduction in different environments. Our findings suggest that growth season plays an important role in shaping variation in life-history traits in B. andrewsi across geographical gradients. The online version of this article (doi:10.1186/s12983-016-0138-0) contains supplementary material, which is available to authorized users.