Life-history variation in marine turtles
Life-history variation in marine turtles
复制标题
海龟的生活史变异
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
L. Crowder
中科院分区：
文献类型：
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作者：
J. Buskirk;L. Crowder
我们使用来自96个不同种群的代表7个物种的数据，研究了与海龟身体大小和繁殖行为相关的性状之间的相关性。我们的分析集中在物种间和物种内种群之间的表型协变模式上。在物种水平上，个体大小与几个生殖性状呈正相关，包括卵大小和总体生殖努力。在剔除身体大小的影响后，海龟的产卵大小和产卵大小之间的权衡得到证实。物种内的变异模式与物种间的不同。例如，在六个物种中，有五个物种的成体大小和窝卵大小之间存在正相关关系，尽管在种间水平上没有发现这种相关性。我们还发现，在生活史特征相互关联的方式上，物种之间存在着重要的差异。拥有足够数量样本的四个物种在全球范围内显示出一致的体型变化模式。事实证明，比较方法可能有助于将为斑海龟开发的人口统计模型扩展到不太知名的物种，尽管许多模型参数尚未估计到其他物种。
We studied correlations among traits related to body size and reproductive behavior in marine turtles, using data from 96 different populations representing seven species. Our analyses focused on patterns of phenotypic covariation among species and among populations within species. At the species level, body size correlated positively with several reproductive traits, including egg size and overall reproductive effort. A trade-off between clutch size and egg size was confirmed for marine turtles, after factoring out the effects of body size. Patterns of variation within species were different from those among species. For example, in five out of six species there was a positive relationship between adult body size and clutch size, although this correlation was not found at the interspecific level. We also found important differences among species in the way life-history traits correlated with one another. Four species having a sufficient number of samples exhibited congruent worldwide patterns of body size variation. A comparative approach may prove useful for extending demographic models developed for loggerhead turtles to less well-known species, even though many of the model parameters have not been estimated for other species.