As part of integrated vector management for malaria in a district with extensive ponds and tanks, the entomology team introduces a fish that voraciously consumes mosquito larvae and thrives in polluted as well as clear water. The fish recommended for this biological control purpose is:
- A Gambusia affinis ✓
- B Catla catla
- C Labeo rohita
- D Clarias batrachus
Correct answer: A. Gambusia affinis
Explanation
Gambusia affinis, the mosquitofish, and Poecilia reticulata (guppy) are the two standard larvivorous fish used in India; Gambusia tolerates polluted water, salinity and temperature extremes, making it suitable for wells, ponds and tanks. Catla and rohu are food carp cultured in composite fish farming and are not employed as larvivores, while Clarias is a bottom-feeding catfish.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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