Small population size and possible extirpation of the threatened Malagasy poison frog Mantella cowanii
We studied one of Madagascar’s most threatened frog species, the harlequin mantella (Mantella cowanii), to confirm it is still present at historic localities and estimate annual survival and population sizes.
In the Press
Urgent conservation efforts needed
phys.org
Small Population Size and Possible Extirpation of the Threatened Malagasy Poison Frog
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New paper on endangered Harlequin Mantella populations
PACE Lab
“The findings underscore the urgent need for targeted conservation action to prevent the species from slipping further towards extinction.“
Doctoral Candidate – Devin Edmonds, University of Illinois
For All Readers - AI Explainer
What is the main focus of this research on Mantella cowanii?
The research focuses on assessing the population size, survival rate, and distribution of Mantella cowanii, a highly threatened frog species in Madagascar, while also identifying key threats like habitat loss and illegal collection for the pet trade.
What did the study discover about Mantella cowanii‘s population in its historical locations?
The study found that Mantella cowanii is no longer present in three of its historical locations, suggesting local extinctions. However, two new populations were discovered, indicating the species may still be found in areas previously undocumented.
How large are the populations that remain, and how are they changing over time?
Remaining populations are extremely small, ranging from 13 to 137 individuals. In one location, the population has declined by over 80% between 2015 and 2023, highlighting a worrying trend for the species’ survival.
What is significant about the lifespan and life cycle of Mantella cowanii?
Mantella cowanii has a longer lifespan than other similar species, with some individuals living up to nine years. This slow life cycle makes the species more vulnerable to threats like habitat loss and illegal collection because it takes longer for the population to recover.
What are the main threats facing Mantella cowanii?
The key threats to Mantella cowanii are habitat destruction and illegal collection for the pet trade. These factors contribute to the decline of the already small populations and make recovery difficult.
What recommendations do the researchers make for conserving Mantella cowanii?
The researchers recommend continued monitoring of the species, involving local communities in conservation efforts, and reassessing Mantella cowanii‘s status on the IUCN Red List. Based on population trends, it may now qualify as Critically Endangered.
Why is this research important for amphibian conservation overall?
This research is part of a global trend showing amphibian populations are declining rapidly. Monitoring species like Mantella cowanii provides crucial information that helps guide conservation actions, preventing extinction and ensuring the survival of these threatened species.
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