Population Differences in Pre- and Post-fertilization Offspring Provisioning in the Least Killifish, Heterandria formosa
Population Differences in Pre- and Post-fertilization Offspring Provisioning in the Least Killifish, Heterandria formosa
复制标题
最小的青鳉鱼受精前和受精后后代供应的种群差异
作者：
Matthew Schrader;J. Travis
摘要：我们利用对最小鳉鱼（Heterandria formosa）两个种群进行长期实地研究的数据，来检验出生时后代大小的基于遗传的种群差异是否主要是由于受精前后代供应的差异（即卵质量的差异）或受精后后代供应的差异（即母体营养的程度）的差异。我们发现种群之间在受精前的后代供应方面存在差异，而在受精后的供应方面则存在更大的差异。这些结果将福尔摩沙的种群变异建立为研究调节母体营养进化的成本和收益的潜在模型。此外，我们的结果阐明了与母体营养相关的一些成本和收益，并深入了解母体营养如何影响其他生活史关系的表达，包括雌性体型和生育力之间的关系、后代数量和体型之间的权衡，以及后代数量和体型对人口密度变化的特定群体反应。
Abstract We used data from a long-term field study of two populations of the Least Killifish, Heterandria formosa, to examine whether genetically based population differences in offspring size at birth are mainly due to differences in pre-fertilization offspring provisioning (i.e., differences in egg mass) or differences in post-fertilization offspring provisioning (i.e., the degree of matrotrophy). We found differences between populations in pre-fertilization offspring provisioning and larger differences in post-fertilization provisioning. These results establish population variation in H. formosa as a potential model for studying the costs and benefits that could modulate the evolution of matrotrophy. In addition, our results illuminate some of the costs and benefits associated with matrotrophy and offer insight into how matrotrophy influences the expression of other life history relationships, including that between female size and fecundity, the trade-off between offspring number and size, and the population-specific responses of offspring number and size to variation in population density.
父母照顾的演变
DOI：
10.1093/acprof:oso/9780199692576.003.0016
发表时间：
2012
期刊：
--
影响因子：
--
作者：
Kölliker M
通讯作者：
Kölliker M