Turning points and transitions are both life events marked by significant change. Whereas turning points are personal changes in life direction, transitions are external changes in daily circumstances. Transition-linked turning points are events that fit both of these definitions. Although transitions and turning points have been examined separately, the current study is the first empirical com...

How genomic expression differs as a function of life history variation is largely unknown. Atlantic salmon exhibits extreme alternative life histories. We defined the gene-expression signatures of wild-caught salmon at two different life stages by comparing the brain expression profiles of mature sneaker males and immature males, and early migrants and late migrants. In addition to life-stage-s...

Typical trajectories of physical decline have been described for people with end-stage disease. It is possible that social, psychological, and spiritual levels of distress may also follow characteristic patterns. We sought to identify and compare changes in the psychological, social, and spiritual needs of people with end-stage disease during their last year of life by synthesizing data from tw...

Hydrozoans are known for their complex life cycles, which can alternate between an asexually reproducing polyp stage and a sexually reproducing medusa stage. Most hydrozoan species, however, lack a free-living medusa stage and instead display a developmentally truncated form, called a medusoid or sporosac, which generally remains attached to the polyp. Although evolutionary transitions in medus...

AIMS To examine the significance of the transtheoretical processes of change in predicting transition through the stages of change in adolescent smokers, as well as the relative role of nicotine dependence in predicting stage transitions. DESIGN In grades 9 and 10, adolescents' stage of change, the use of processes of change and nicotine dependence were assessed (T1). Stage transitions were a...

We compared whole transcriptome variation in six pre-adult stages and seven adult female ages in two populations of cactophilic Drosophila mojavensis reared on two host plants to understand how differences in gene expression influence standing life history variation. We used singular value decomposition (SVD) to identify dominant trajectories of life cycle gene expression variation, performed p...