Pune: Local fishermen are becoming increasingly concerned about quick expansion of the so-called ‘helicopter fish’ in the Ujani Dam, since the invasive ornamental species is threatening native freshwater fish populations.
Helicopter Fish: Increasing Population
Large amounts of fish seed were carried away during water discharge since the dam quickly filled up after this year’s high rains. The natural aquatic equilibrium has been upset, nevertheless, by the abrupt increase in the number of helicopter fish, which are usually kept in home aquariums.
Fishermen Experiencing Huge Loses
Traditional freshwater species have severely decreased in the reservoir, according to fishermen. The hardy, spiky, scale-covered bodies of the helicopter fish are causing damage to fishing gear in addition to surpassing native species. When these fish entangle, nets frequently tear, resulting in significant losses for fishermen.
Helicopter Fish: Life-Threatening For Other Fish
Given its fin and body structure, the freshwater angelfish is commonly referred to as the “helicopter fish” in aquariums. Angelfish’s possessive and aggressive tendencies, particularly toward slower or smaller tankmates, can have a damaging effect on other fish in an aquarium. Angelfish are carnivores, meaning they will consume any fish that can fit in their tiny mouths. Shrimp, guppies, and neon tetras are among the little species that are most at risk.
In the past, native fish including Rohu, Murrel, Catla, Vam, Ghogrya, and Aher were common in the Ujani reservoir. However, invasive species like tilapia have also increased in number in recent years. Despite their quick growth, tilapia interfere with the natural food chain and prevent native fish species from expanding.
Prawns have just been reported to have begun to appear in the Ujani Dam, which offers the fishermen fresh hope. Positive changes in the water quality are indicated by the prawns’ normal growth. A prawn seed culture program launched by the state government might greatly boost fish production. Additionally, prawns have a strong market demand, which would increase fishermen’s earnings and stability.
