Body condition based on scaled mass index in adult Pelophylax ridibundus (Amphibia: Ranidae) inhabiting a polluted area in Southern Bulgaria

Zhelev, Zhivko M.; Minchev, Danail S.

doi:10.1007/s11756-023-01521-4

Cited by 1 publication

(1 citation statement)

References 34 publications

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“…After oviposition, we measured the snout-vent length of both parents with a calliper and weighed them on a precision scale. We calculated the scaled mass index (SMI) developed by Peig and Green (2009) to assess parental body condition as SMI accurately reflects amphibian energy stores in anuran species (Băncilă et al, 2010; Landler et al, 2023; MacCracken and Stebbings, 2012; Zhelev and Minchev, 2023). We described how we categorized males and females into the thin and fat groups in the “statistical analyses” section below.…”

Section: Methodsmentioning

confidence: 99%

Maternal body condition affects the response of larval spined toads’ faecal microbiome to a widespread contaminant

Tartu,

Pollet,

Clavereau

et al. 2023

Preprint

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Glyphosate’s primary metabolite, aminomethylphosphonic acid (AMPA) is the most detected pollutant in surface waters. Recent studies have raised concerns regarding its toxicity, yet the involved underlying mechanisms remain poorly understood. A disruption of the gut microbiome, which plays a crucial role in host health, could be the mediator of most adverse effects. We investigated the impact of AMPA exposure on the gut microbiome of spined toad tadpoles (Bufo spinosus). We hypothesized that AMPA could alter the gut microbiota composition and that these effects could depend on the microbiota source. We exposed tadpoles to minute concentrations of AMPA and analyzed their faecal microbiota using 16S rRNA gene sequencing as a proxy of the gut microbiota. AMPA exposure decreased the gut bacterial biomass and affected bacterial community composition of tadpole’s faeces. Furthermore, we observed interactions between AMPA exposure and maternal body condition on the Bacteroidota and Actinobacteriota phyla abundances. This suggests a maternal effect on early-life microbial colonizers that could influence the response of the gut microbiome to AMPA. These findings highlight the importance of considering the gut microbiome when studying the effects of environmental contaminants. Further research is needed to elucidate the long-term implications of this microbiome alteration for amphibian health.

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