Markers of fertility in reproductive microbiomes of male and female endangered black-footed ferrets (Mustela nigripes)

Author:

Bornbusch Sally L.ORCID,Bamford Alexandra,Thacher Piper,Crosier Adrienne,Marinari Paul,Bortner Robyn,Garelle Della,Livieri TravisORCID,Santymire Rachel,Comizzoli Pierre,Maslanka Michael,Maldonado Jesús E.,Koepfli Klaus-Peter,Muletz-Wolz Carly R.ORCID,DeCandia Alexandra L.

Abstract

AbstractReproductive microbiomes contribute to reproductive health and success in humans. Yet data on reproductive microbiomes, and links to fertility, are absent for most animal species. Characterizing these links is pertinent to endangered species, such as black-footed ferrets (Mustela nigripes), whose populations show reproductive dysfunction and rely on ex-situ conservation husbandry. To understand microbial contributions to animal reproductive success, we used 16S rRNA amplicon sequencing to characterize male (prepuce) and female (vaginal) microbiomes of 59 black-footed ferrets at two ex-situ facilities and in the wild. We analyzed variation in microbiome structure according to markers of fertility such as numbers of viable and non-viable offspring (females) and sperm concentration (males). Ferret vaginal microbiomes showed lower inter-individual variation compared to prepuce microbiomes. In both sexes, wild ferrets harbored potential soil bacteria, perhaps reflecting their fossorial behavior and exposure to natural soil microbiomes. Vaginal microbiomes of ex-situ females that produced non-viable litters had greater phylogenetic diversity and distinct composition compared to other females. In males, sperm concentration correlated with varying abundances of bacterial taxa (e.g., Lactobacillus), mirroring results in humans and highlighting intriguing dynamics. Characterizing reproductive microbiomes across host species is foundational for understanding microbial biomarkers of reproductive success and for augmenting conservation husbandry.

Publisher

Springer Science and Business Media LLC

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