Agile Frog: Impact of Global Warming on Sex Reversal
The agile frog is a European amphibian. Recent research has highlighted a potential link between high temperatures during larval development and female-to-male sex reversal.
Why in News?
A recent study has highlighted the potential impact of global warming on sex reversal in agile frogs (Rana dalmatina), raising concerns about the possible consequences of rising temperatures for amphibian populations and their long-term survival.
Key Facts about the Agile Frog
Scientific Name: Rana dalmatina
Family: Ranidae
Distribution: Native to Europe, particularly central and southern parts of the continent.
Habitat: Woodlands, meadows and wetlands. It generally breeds in shallow, still-water bodies.
Distinctive Feature: It has long hind limbs and a remarkable jumping ability.
IUCN Red List Status: Least Concern (LC), although its population trend is reported as decreasing.
Temperature-Induced Sex Reversal
Sex reversal refers to a situation in which an individual's sexual development does not correspond to its genetic sex. Research suggests that genetically female frogs with XX chromosomes may develop male characteristics under certain environmental conditions.
High temperatures during the larval stage may influence sexual development and potentially trigger female-to-male sex reversal in agile frogs. However, the extent of this effect and its consequences for wild populations require further investigation.
Ecological Significance
Climate Change: Rising temperatures can influence the development, reproduction and survival of amphibians.
Reproductive Balance: Changes in the proportion of reproductive sexes may affect mating patterns and reproductive success.
Habitat Degradation: Wetland destruction and habitat loss pose additional threats to amphibian populations.
Biodiversity Conservation: Monitoring temperature-related changes in amphibians can help scientists understand the broader ecological consequences of global warming.
Although the agile frog is currently classified as Least Concern on the IUCN Red List, this status does not mean that it is free from environmental threats. Continued research and habitat conservation are important for understanding and managing the potential risks posed by climate change.
MCQ English
Q. Consider the following statements about the agile frog (Rana dalmatina):
It belongs to the family Ranidae.
It is native to Europe.
It is classified as Endangered on the IUCN Red List.
Which of the statements given above are correct?
(A) 1 and 2 only
(B) 2 and 3 only
(C) 1 and 3 only
(D) 1, 2 and 3
Answer: (A)
Explanation: The agile frog belongs to the family Ranidae and is native to Europe. Its IUCN Red List category is Least Concern (LC), not Endangered.