The evolution of parental care and egg size: a comparative analysis in frogs
The evolution of parental care and egg size: a comparative analysis in frogs
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DOI：
10.1098/rspb.2005.3368
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
K. Summers;Christian Sea McKeon;H. Heying
中科院分区：
文献类型：
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作者：
K. Summers;Christian Sea McKeon;H. Heying
父母照料和卵大小的进化引起了相当大的关注和理论争论。已经提出了几个不同的假设有关的轨迹，父母的照顾和鸡蛋大小的演变和特定的进化过渡的顺序。很少有比较研究调查了这些假设的预测。在这里，我们调查的进化关联在系统发育的背景下，在青蛙的父母照顾和鸡蛋的大小。从科学文献中收集了各种青蛙的卵大小和是否存在父母照顾的数据。作为我们的比较分析的基础，我们开发了一个系统发育超树，通过结合文献中使用矩阵表示简约的多个系统发育分析的结果。使用系统发育成对比较，我们证明了一个显着的关联之间的演变，父母的照顾和大鸡蛋的大小。然后，我们使用最近开发的最大似然方法来推断特定过渡的进化顺序。这一分析表明，大鸡蛋大小的进化通常先于父母照顾的进化，而不是相反。我们讨论了我们的研究结果的相关性，以前的假设有关的父母照顾和鸡蛋大小的演变。
The evolution of parental care and egg size has attracted considerable attention and theoretical debate. Several different hypotheses have been proposed concerning the trajectories of parental care and egg size evolution and the order of specific evolutionary transitions. Few comparative studies have investigated the predictions of these hypotheses. Here, we investigate the evolutionary association between parental care and egg size in frogs in a phylogenetic context. Data on egg size and presence or absence of parental care in various species of frogs was gathered from the scientific literature. As a basis for our comparative analyses, we developed a phylogenetic supertree, by combining the results of multiple phylogenetic analyses in the literature using matrix representation parsimony. Using phylogenetic pairwise comparisons we demonstrated a significant association between the evolution of parental care and large egg size. We then used recently developed maximum likelihood methods to infer the evolutionary order of specific transitions. This analysis revealed that the evolution of large egg size typically precedes the evolution of parental care, rather than the reverse. We discuss the relevance of our results to previous hypotheses concerning the evolution of parental care and egg size.