Testosterone variation in a semi-captive population of Asian elephants in Myanmar DOI Creative Commons
Héloïse Moullec, Vérane Berger, Diogo Santos

et al.

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Abstract Hormones are known to be involved in life-history trade-offs as systemic signals that establish functional links among traits and regulate key behavioural physiological transitions between states organisms. Although major functions of many steroid hormones such testosterone conserved vertebrates, circulating concentrations vary widely both within across species, the degree which observed hormone mediate responses environmental variation is less understood. In this study, we investigated how faecal metabolite (FTM) varied with extrinsic intrinsic factors. To do so, took advantage a 6-year period longitudinal sampling FTM, indicators stress oxidative status semi-captive population Asian elephants (n = 3163 samples from 173 individuals) Myanmar. We determined FTM associated age, sex, origin (captive-born or wild-caught), seasonality environment, individual level [measured by glucocorticoid (FGM) heterophil lymphocyte ratio (H/L)] (reactive oxygen superoxide dismutase activity). reported increased age juvenile adulthood for sexes, higher males than females. Moreover, showed significantly during hot season monsoon cold season. However, indicators, found contrasting results. While were strongly positively correlated FGM concentrations, not related H/L ratios. Finally, no relationship individuals. Our study provides new insights on factors concentrations—a reproduction fitness individuals—in living their natural has relevance effective conservation measures endangered species.

Language: Английский

Testosterone variation in a semi-captive population of Asian elephants in Myanmar DOI Creative Commons
Héloïse Moullec, Vérane Berger, Diogo Santos

et al.

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Abstract Hormones are known to be involved in life-history trade-offs as systemic signals that establish functional links among traits and regulate key behavioural physiological transitions between states organisms. Although major functions of many steroid hormones such testosterone conserved vertebrates, circulating concentrations vary widely both within across species, the degree which observed hormone mediate responses environmental variation is less understood. In this study, we investigated how faecal metabolite (FTM) varied with extrinsic intrinsic factors. To do so, took advantage a 6-year period longitudinal sampling FTM, indicators stress oxidative status semi-captive population Asian elephants (n = 3163 samples from 173 individuals) Myanmar. We determined FTM associated age, sex, origin (captive-born or wild-caught), seasonality environment, individual level [measured by glucocorticoid (FGM) heterophil lymphocyte ratio (H/L)] (reactive oxygen superoxide dismutase activity). reported increased age juvenile adulthood for sexes, higher males than females. Moreover, showed significantly during hot season monsoon cold season. However, indicators, found contrasting results. While were strongly positively correlated FGM concentrations, not related H/L ratios. Finally, no relationship individuals. Our study provides new insights on factors concentrations—a reproduction fitness individuals—in living their natural has relevance effective conservation measures endangered species.

Language: Английский

Citations

0