Wild cane toads (Rhinella marina) expel foreign matter from the coelom via the urinary bladder in response to internal injury, endoparasites and disease

C. Kelehear, Hugh Jones, B.A. Wood, R. Shine

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    Abstract

    © 2015 Kelehear et al.This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Dissections of >1,200 wild-caught cane toads (Rhinella marina) in tropical Australia confirm a laboratory report that anurans can expel foreign objects from the coelom by incorporating them into the urinary bladder. The foreign objects that we found inside bladders included a diverse array of items (e.g., grass seeds, twigs, insect prey, parasites), many of which may have entered the coelom via rupture of the gut wall. In some cases, the urinary bladder was fused to other organs including liver, fat bodies, ovaries, Bidder's organs, lungs, mesentery, stomach wall, gall bladder, and the abdominal wall. Acanthocephalan parasites (of a range of developmental stages) were identified from the walls of the urinary bladders of three cane toads. This organ may play a significant role in destroying or excreting metazoan parasites, as well as inanimate objects.
    Original languageEnglish
    Article numbere0134036
    Pages (from-to)1-9
    JournalPLoS One
    Volume10
    Issue number8
    DOIs
    Publication statusPublished - 12 Aug 2015

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