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Manganese Exacerbates Seasonal Health Declines in a Suicidally Breeding Mammal

Version 3 2024-06-19, 21:44
Version 2 2024-06-03, 01:00
Version 1 2023-10-16, 03:06
journal contribution
posted on 2024-06-19, 21:44 authored by AF Amir Abdul Nasir, AC Niehaus, SF Cameron, Beata UjvariBeata Ujvari, Thomas MadsenThomas Madsen, FA von Hippel, S Gao, DM Dillon, CL Buck, J Charters, J Heiniger, S Blomberg, RS Wilson
AbstractReproductive costs must be balanced with survival to maximize lifetime reproductive rates; however, some organisms invest in a single, suicidal bout of breeding known as semelparity. The northern quoll (Dasyurus hallucatus) is an endangered marsupial in which males, but not females, are semelparous. Northern quolls living near mining sites on Groote Eylandt, Northern Territory, Australia, accumulate manganese (Mn) in their brains, testes, and hair, and elevated Mn impacts motor performance. Whether Mn is associated with other health declines is yet unknown. In the present study we show that male and female northern quolls with higher Mn accumulation had a 20% reduction in immune function and a trend toward reduced cortisol concentrations in hair. The telomere lengths of male quolls did not change pre‐ to postbreeding, but those with higher Mn levels had longer telomeres; in contrast, the telomeres of females shortened during the breeding season but recovered between the first year and second year of breeding. In addition, the telomeres of quolls that were recaptured declined at significantly higher rates in quolls with higher Mn between prebreeding, breeding, and/or postbreeding seasons. Future research should determine whether changes in cortisol, immune function, or telomere length affect reproductive output or survival—particularly for semelparous males. Environ Toxicol Chem 2023;00:1–13. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

History

Journal

Environmental Toxicology and Chemistry

Volume

43

Pagination

74-86

Location

United States

ISSN

0730-7268

eISSN

1552-8618

Language

en

Publication classification

C1 Refereed article in a scholarly journal

Issue

1

Publisher

Wiley

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