Physella Acuta
2021 DEC 7
Preliminary >
Environment and Ecology > Miscellaneous > Species in news
Why in news?
- A tiny snail species named Physella Acuta (also known as acute bladder snail) found in Kerala has been flagged as an invasive species that could play havoc with native ecosystems.
- This snail species is globally branded as a highly invasive species.
About Physella Acuta:
- Physella acuta is a snail species.
- It is considered native to North America but is now found in all continents except Antarctica.
- The snail is small in size with a striking, pellucid, golden-yellow shell. It can also easily be identified by its sinistral (left-opening aperture) shell.
- Its good looks make this snail a favourite of aquariums.
- It was first reported in India in the early 1990s. It has been reported for the first time in Kerala. It is believed to have reached Kerala through the aquarium trade, a major vector for invasive species.
Threats posed:
- Physella Acuta plays host to worms that can cause food-borne diseases and skin itches in humans.
- Moreover, its rapid growth rate, air-breathing capability, and tolerance to pollution makes the Physella acuta a potential competitor to native fauna.
PRACTICE QUESTION:
Physella Acuta, recently seen in news, is:
(a) A tree-borne oilseed suitable for biodiesel production
(b) A tiny snail species globally branded as a highly invasive species
(c) A tree species in semi-arid and arid ecosystems
(d) A bacterium capable of breaking down and consuming the plastic polyethylene terephthalate
Answer