scholarly journals Trajectories of K-12 Schools and Demographic Differences: Evidence From 2017 Life History Mail Survey

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 918-918
Author(s):  
Wenshan Yu ◽  
Xuefei Li ◽  
Jacqui Smith

Abstract Besides information about the highest degree, little information about early-life education is available in most population surveys. This study identified the trajectories of K-12 education history among older adults in the Health and Retirement Study born between 1930 and 1960, and examined the associations with demographic variables. Drawing on 2017 Spring and Fall Life History Mail Survey (LHMS; n = 3,206), we used sequence analysis to determine and classify trajectories of school types across the education history. We identified five trajectories: 1) always private school with White students, 2) always public school with White students, 3) always public school with Non-White students, 4) mostly private school with Non-White students, and 5) no report of school types. The trajectories showed that changes in school type (i.e. private to public) often happened in grade 9. Changes rarely happened across race/ethnicity groups (i.e. mostly White to mostly non-White). We used multinomial logistic regression to examine the relationship between demographic variables and education trajectories. We found that compared to Black participants, White participants were significantly less likely to be in mostly Non-White schools (public and private schools, p<0.001). The 1940s and 1950s cohort were more likely to join mostly White private schools than the 1930s cohort (odds ratio: 1.70 for 1940s and 1.62 for 1950s separately, p<0.005). Our findings illustrate a novel application of sequence analysis with life history data, as well as new evidence on recial segregation in early-life education within the last century.

2020 ◽  
Vol 650 ◽  
pp. 7-18 ◽  
Author(s):  
HW Fennie ◽  
S Sponaugle ◽  
EA Daly ◽  
RD Brodeur

Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.


2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Daniel E Winkler ◽  
Michelle Yu-Chan Lin ◽  
José Delgadillo ◽  
Kenneth J Chapin ◽  
Travis E Huxman

We studied how a rare, endemic alpine cushion plant responds to the interactive effects of warming and drought. Overall, we found that both drought and warming negatively influenced the species growth but that existing levels of phenotypic variation may be enough to at least temporarily buffer populations.


2017 ◽  
Vol 36 (2) ◽  
pp. 338-350 ◽  
Author(s):  
John M. McLeod ◽  
Howard L. Jelks ◽  
Sandra Pursifull ◽  
Nathan A. Johnson

Crustaceana ◽  
1994 ◽  
Vol 66 (3) ◽  
pp. 271-294 ◽  
Author(s):  
Bruce F. Phillips ◽  
John D. Booth

Crustaceana ◽  
1994 ◽  
Vol 67 (1) ◽  
pp. 1-25 ◽  
Author(s):  
J. Stanley Cobb ◽  
Richard A. Wahle

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