Personal information

Emails & domains

Verified email domains

Activities

Collapse all

Employment (2)

Michigan State University: Hickory Corners, MI, US

2020-06-01 to present | Professor (Kellogg Biological Station)
Employment
Source: Self-asserted source
Fredric Janzen

Iowa State University: Ames, IA, US

1994-06 to 2021-09-30 | Professor (Ecology, Evolution, & Organismal Biology)
Employment
Source: Self-asserted source
Fredric Janzen

Education and qualifications (4)

University of California Davis: Davis, CA, US

1992-08 to 1994-05 | Postdoctoral Fellow (Center for Population Biology)
Education
Source: Self-asserted source
Fredric Janzen

University of Chicago: Chicago, Illinois, US

1987-08 to 1992-06 | PhD (Ecology & Evolution)
Education
Source: Self-asserted source
Fredric Janzen

Colorado State University: Fort Collins, CO, US

1985-08 to 1987-06 | M.S. (Zoology)
Education
Source: Self-asserted source
Fredric Janzen

North Central College: Naperville, IL, US

1982-01 to 1985-06 | B.A. (Biology/Chemistry)
Education
Source: Self-asserted source
Fredric Janzen

Funding (5)

Transgenerational Effects of Maternal Stress in the Painted Turtle, Chrysemys picta

2015-07 to present | Grant
Iowa Science Foundation (Cedar Rapids, US)
GRANT_NUMBER:

15-16
Source: Self-asserted source
Fredric Janzen

Biodemography and Senescence in Long-lived Painted Turtles

2015-06 to present | Grant
National Institutes of Health (MD, MD, US)
GRANT_NUMBER:

R01-AG049416-01
Source: Self-asserted source
Fredric Janzen

Environmental DNA - A New Tool for Population Monitoring

2015-04 to present | Grant
Iowa Department of Natural Resources (Des Moines, US)
Source: Self-asserted source
Fredric Janzen

Climate Change and Environmental Sex Determination in a Geographically-widespread Species

2013-05 to present | Grant
National Science Foundation (VA, US)
GRANT_NUMBER:

IOS-1257857
Source: Self-asserted source
Fredric Janzen

LTREB Renewal: Long-term Research on Environmental Gender Determination in a Model System (Chrysemys)

2012-09 to present | Grant
National Science Foundation (VA, US)
GRANT_NUMBER:

DEB-1242510
Source: Self-asserted source
Fredric Janzen

Works (15)

Adult Sex‐Ratio Bias Does Not Lead to Detectable Adaptive Offspring Sex Allocation Via Nest‐Site Choice in a Turtle With Temperature‐Dependent Sex Determination

Ecology and Evolution
2024-11 | Journal article
DOI: 10.1002/ece3.70543
Contributors: Claudia Crowther; Clare I. M. Adams; Andy Fondren; Fredric J. Janzen
Source: check_circle
Crossref

Developmental Thermal Reaction Norms of Leatherback Marine Turtles at Nesting Beaches

Animals
2024-10-22 | Journal article
DOI: 10.3390/ani14213050
Contributors: Marc Girondot; Caleb J. Krueger; Camille Cléomène; Zeenat Tran; Damien Chevallier; Fredric J. Janzen
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity

Science
2022-06-24 | Journal article
DOI: 10.1126/science.abm0151
Contributors: Beth A. Reinke; Hugo Cayuela; Fredric J. Janzen; Jean-François Lemaître; Jean-Michel Gaillard; A. Michelle Lawing; John B. Iverson; Ditte G. Christiansen; Iñigo Martínez-Solano; Gregorio Sánchez-Montes et al.
Source: check_circle
Crossref

Joint estimation of growth and survival from mark–recapture data to improve estimates of senescence in wild populations: Reply

Ecology
2022-01 | Journal article
DOI: 10.1002/ecy.3571
Contributors: Anne M. Bronikowski; Beth A. Reinke; Luke Hoekstra; Fredric J. Janzen; David A. W. Miller
Source: check_circle
Crossref

ROSIE, a database of reptilian offspring sex ratios and sex-determining mechanisms, beginning with Testudines

Scientific Data
2022-01-21 | Journal article
DOI: 10.1038/s41597-021-01108-1
Contributors: Caleb J. Krueger; Fredric J. Janzen
Source: check_circle
Crossref

Predicting the effects of climate change on incubation in reptiles: methodological advances and new directions

Journal of Experimental Biology
2021-02-15 | Journal article
DOI: 10.1242/jeb.236018
Contributors: A. L. Carter; Fredric J. Janzen
Source: check_circle
Crossref

Becoming creatures of habit: Among‐ and within‐individual variation in nesting behaviour shift with age

Journal of Evolutionary Biology
2020-11 | Journal article
DOI: 10.1111/jeb.13701
Contributors: David M. Delaney; Luke A. Hoekstra; Fredric J. Janzen
Source: check_circle
Crossref

Risk-sensitive maternal investment: an evaluation of parent–offspring conflict over nest site choice in the wild

Animal Behaviour
2020-05 | Journal article
DOI: 10.1016/j.anbehav.2020.03.004
Contributors: David M. Delaney; Fredric J. Janzen
Source: check_circle
Crossref

Breadth of the thermal response captures individual and geographic variation in temperature‐dependent sex determination

Functional Ecology
2019-10 | Journal article
DOI: 10.1111/1365-2435.13410
Contributors: Anna L. Carter; Brooke L. Bodensteiner; John B. Iverson; Carrie L. Milne‐Zelman; Timothy S. Mitchell; Jeanine M. Refsnider; Daniel A. Warner; Fredric J. Janzen; Craig White
Source: check_circle
Crossref

Do Covariances Between Maternal Behavior and Embryonic Physiology Drive Sex-Ratio Evolution Under Environmental Sex Determination?

Journal of Heredity
2019-07-01 | Journal article
DOI: 10.1093/jhered/esz021
Contributors: Fredric J Janzen; David M Delaney; Timothy S Mitchell; Daniel A Warner
Source: check_circle
Crossref

Geographic variation in thermal sensitivity of early life traits in a widespread reptile

Ecology and Evolution
2019-03 | Journal article
DOI: 10.1002/ece3.4956
Contributors: Brooke L. Bodensteiner; Daniel A. Warner; John B. Iverson; Carrie L. Milne‐Zelman; Timothy S. Mitchell; Jeanine M. Refsnider; Fredric J. Janzen
Source: check_circle
Crossref

A Brief Review of Non-Avian Reptile Environmental DNA (eDNA), with a Case Study of Painted Turtle (Chrysemys picta) eDNA Under Field Conditions

Diversity
2019-03-29 | Journal article
DOI: 10.3390/d11040050
Contributors: Clare I. M. Adams; Luke A. Hoekstra; Morgan R. Muell; Fredric J. Janzen
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Development-specific transcriptomic profiling suggests new mechanisms for anoxic survival in the ventricle of overwintering turtles

Journal of Experimental Biology
2019-01-01 | Journal article
DOI: 10.1242/jeb.213918
Contributors: Cornelia E. Fanter; Zhenguo Lin; Sarah W. Keenan; Fredric J. Janzen; Timothy S. Mitchell; Daniel E. Warren
Source: check_circle
Crossref

Quantifying the effects of embryonic phenotypic plasticity on adult phenotypes in reptiles: A review of current knowledge and major gaps

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology
2018-04 | Journal article
DOI: 10.1002/jez.2187
Contributors: Timothy S. Mitchell; Fredric J. Janzen; Daniel A. Warner
Source: check_circle
Crossref

Temperature-dependent sex determination under rapid anthropogenic environmental change: evolution at a turtle's pace?

Journal of Heredity
2016 | Journal article
Source: Self-asserted source
Fredric Janzen

Peer review (2 reviews for 2 publications/grants)

Review activity for Nature (1)
Review activity for Nature ecology & evolution. (1)
How many people are using ORCID?