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Faculté des Sciences
Faculté des Sciences
MASTER THESIS
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Invasive toxic amphibians: A bibliographic review

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Leclère, Thomas ULiège
Promotor(s) : Denoël, Mathieu ULiège ; Osamu, Kishida
Date of defense : 2-Sep-2021 • Permalink : http://hdl.handle.net/2268.2/12579
Details
Title : Invasive toxic amphibians: A bibliographic review
Translated title : [fr] Les amphibiens toxiques et invasifs : une synthèse bibliographique
Author : Leclère, Thomas ULiège
Date of defense  : 2-Sep-2021
Advisor(s) : Denoël, Mathieu ULiège
Osamu, Kishida 
Committee's member(s) : Frederich, Bruno ULiège
Parmentier, Eric ULiège
Lejeune, Pierre 
Language : English
Discipline(s) : Life sciences > Zoology
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en biologie des organismes et écologie, à finalité approfondie
Faculty: Master thesis of the Faculté des Sciences

Abstract

[en] Despite being globally in decline, a few amphibians are menacing biodiversity by their invasive character in some regions of the world. These invasive amphibians have chemical defenses and are known to take advantage of their toxicity to conquer new territories. Unfortunately, their diversity are concealed by one species particularly studied: Rhinella marina. With the aim of counterbalancing this issue, this work, focusing the invasive toxic amphibians, has been conducted. A dataset regrouping invasive toxic amphibians has been compiled using articles and others literature mentioning on one hand the invasiveness and on the other predator poisoning or the existence of toxic compounds. The toxins used as well as their origins have been discussed alongside with the impacts on native fauna, their adaptation, the invaders' taxonomic diversity and the benefits of toxicity. This taxonomic diversity is reflected in the large number of families (n = 10) containing at least one invasive and toxic species in the two major amphibian orders: Anura and Caudata. The toxin analysis revealed a wide range of toxic substances as well as some similarities between different families using the same molecules such as tetrodotoxin, a potent neurotoxin.
The diversity of toxins goes hand in hand with the multiple effects possible in predators, ranging from a repellent taste to death, thus altering the feeding habits of predators. Consequently, toxicity turns out to be a major asset for invasive amphibians: it causes the decline of potential native predators and therefore in return promotes the proliferation of invasives. In conclusion, this dissertation provides a broad approach to invasive and toxic amphibians, bringing together a large amount of information for future research.


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Author

  • Leclère, Thomas ULiège Université de Liège > Master biol. orga. & écol., fin.

Promotor(s)

Committee's member(s)

  • Frederich, Bruno ULiège Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
    ORBi View his publications on ORBi
  • Parmentier, Eric ULiège Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
    ORBi View his publications on ORBi
  • Lejeune, Pierre STARESO
  • Total number of views 28
  • Total number of downloads 1










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