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24 February 2022 Life History Stage and Sex-specific Survival Rates for the Japanese Pond Turtle, Mauremys japonica, in the Foothill Region of Chiba Prefecture, Japan
Shawichi Kagayama
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Abstract

Life history parameters are essential when we consider appropriate strategy for conservation of wildlife based on population dynamics modelling. In this study, life history stage and sex-specific survival rates of a Japanese pond turtle (Mauremys japonica) population in foothill region were estimated. Life history was divided into three stages based on the age, separately for males and females, estimated by counting the number of annual rings on scutes: juvenile (1–2 years old), young adult (3–4), and adult (>5) in males, and juvenile (1–4), subadult (5–7), and adult (>8) in females. The median annual survival of subadult and adult females was 0.84 (95% credible interval: 0.54–0.99) and 0.94 (0.77–1.00), respectively, and higher than the survival of juvenile females. In contrast, adult survival of males was estimated as 0.79 (0.44–0.99), and it was higher than the survival of young adult and juvenile males. This study showed that the patterns of survivorship of M. japonica coincide with those of other chelonians.

© 2022 by The Herpetological Society of Japan
Shawichi Kagayama "Life History Stage and Sex-specific Survival Rates for the Japanese Pond Turtle, Mauremys japonica, in the Foothill Region of Chiba Prefecture, Japan," Current Herpetology 41(1), 138-146, (24 February 2022). https://doi.org/10.5358/hsj.41.138
Accepted: 5 January 2022; Published: 24 February 2022
JOURNAL ARTICLE
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KEYWORDS
Bayesian hierarchical modelling
capture-recapture
Cormack-Jolly-Seber model
freshwater turtle
survivorship
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