Toad‐kill: Prey diversity and preference of invasive guttural toads (Sclerophrys gutturalis) in Mauritius. (23rd October 2020)
- Record Type:
- Journal Article
- Title:
- Toad‐kill: Prey diversity and preference of invasive guttural toads (Sclerophrys gutturalis) in Mauritius. (23rd October 2020)
- Main Title:
- Toad‐kill: Prey diversity and preference of invasive guttural toads (Sclerophrys gutturalis) in Mauritius
- Authors:
- Baxter‐Gilbert, James
Florens, F. B. Vincent
Baider, Cláudia
Perianen, Yuvna Devi
Citta, Denzel Shane
Appadoo, Chandani
Measey, John - Abstract:
- Abstract: The invertebrate communities of Mauritius host a high degree of endemism, but are also imperilled by an array of factors, including invasive predators. Since their introduction in 1922, guttural toads ( Sclerophrys gutturalis ) have spread across the island and have been implicated in the decline of a number of endemic invertebrate species. In this study, we examined the feeding habits of the invasive population of guttural toads from three naturally forested locations in Mauritius across multiple years by analysing their stomach content. We also measured the relative abundance of prey items on the landscape using pitfall traps and applied these data to determine prey preference using a Relativised Electivity Index. Insects, malacostracans and gastropods constituted the bulk of the toads' diet (48.7%, 33.4% and 11.8%, respectively), which also included several rare and endemic species. We further determined that insects and malacostracans were also the two most favoured prey taxa, relative to what was available on the landscape. Our investigation has generated several recommendations for future research and provides a fundamental understanding of the diet of guttural toads in the native forests of Mauritius. Résumé: Les communautés d'invertébrés de l'île Maurice présentent un taux d'endémisme élevé, mais sont également menacées par une multitude de facteurs, notamment des prédateurs envahissants. Depuis leur introduction en 1922, les crapauds gutturaux (Abstract: The invertebrate communities of Mauritius host a high degree of endemism, but are also imperilled by an array of factors, including invasive predators. Since their introduction in 1922, guttural toads ( Sclerophrys gutturalis ) have spread across the island and have been implicated in the decline of a number of endemic invertebrate species. In this study, we examined the feeding habits of the invasive population of guttural toads from three naturally forested locations in Mauritius across multiple years by analysing their stomach content. We also measured the relative abundance of prey items on the landscape using pitfall traps and applied these data to determine prey preference using a Relativised Electivity Index. Insects, malacostracans and gastropods constituted the bulk of the toads' diet (48.7%, 33.4% and 11.8%, respectively), which also included several rare and endemic species. We further determined that insects and malacostracans were also the two most favoured prey taxa, relative to what was available on the landscape. Our investigation has generated several recommendations for future research and provides a fundamental understanding of the diet of guttural toads in the native forests of Mauritius. Résumé: Les communautés d'invertébrés de l'île Maurice présentent un taux d'endémisme élevé, mais sont également menacées par une multitude de facteurs, notamment des prédateurs envahissants. Depuis leur introduction en 1922, les crapauds gutturaux ( Sclerophrys gutturalis ) se sont répandus à travers l'île et ont joué un rôle dans le déclin d'un certain nombre d'espèces endémiques d'invertébrés. Dans cette étude, nous avons examiné les habitudes alimentaires de la population invasive de crapauds gutturaux au sein de trois sites naturellement boisés situés à l'île Maurice sur plusieurs années en analysant le contenu de leur estomac. Nous avons également quantifié l'abondance relative des proies dans l'environnement à l'aide de pièges à fosse et avons appliqué ces données pour déterminer la préférence en termes de proies à l'aide d'un indice d'électivité relativisé. Les insectes, les malacostracés et les gastéropodes constituaient l'essentiel du régime alimentaire des crapauds (respectivement 48, 7%, 33, 4% et 11, 8%), qui comprenait également plusieurs espèces rares et endémiques. Nous avons en outre déterminé que les insectes et les malacostracés étaient également les deux taxons de proies préférés par rapport aux autres proies disponibles dans cet environnement. Notre enquête a généré plusieurs recommandations pour les futures recherches et fournit une compréhension fondamentale du régime alimentaire des crapauds gutturaux dans les forêts indigènes de l'île Maurice. … (more)
- Is Part Of:
- African journal of ecology. Volume 59:Number 1(2021)
- Journal:
- African journal of ecology
- Issue:
- Volume 59:Number 1(2021)
- Issue Display:
- Volume 59, Issue 1 (2021)
- Year:
- 2021
- Volume:
- 59
- Issue:
- 1
- Issue Sort Value:
- 2021-0059-0001-0000
- Page Start:
- 168
- Page End:
- 177
- Publication Date:
- 2020-10-23
- Subjects:
- anuran -- conservation -- diet -- gastropod -- invasion biology -- invertebrate -- Mauritius -- predation
Zoology -- Africa -- Periodicals
Ecology -- Africa -- Periodicals
Wildlife management -- Africa -- Periodicals
Zoology -- Africa, East -- Periodicals
Ecology -- Africa, East -- Periodicals
Wildlife management -- Africa, East -- Periodicals
577 - Journal URLs:
- http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2028 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1111/aje.12814 ↗
- Languages:
- English
- ISSNs:
- 0141-6707
- Deposit Type:
- Legaldeposit
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- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 0732.519000
British Library DSC - BLDSS-3PM
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- 15961.xml