What is meant by fish passes? Discuss the possible consequences of its construction, along with the relevant illustrations. (150 Words)
Refer - The Indian Express
Enrich the answer from other sources, if the question demands.
IAS Parliament 5 years
KEY POINTS
· Fish passes, also known as fish ladders or fish ways, aim to assist fish in crossing obstacles presented by dams and barrages.
· They usually consist of small steps that allow the fish to climb over the obstacles and enable them to reach the open waters on the other side.
· It requires controlling the water running over these ladders, as they must be adequate to catch the attention of the fish, but not too strong to deter them from swimming against it.
Possible Consequences
Positive:
· Fish passage includes removal or replacement of barriers in the river systems.
· Barrier removal can help manage flooding by allowing rivers to flow naturally which restores floodplains.
· Removal also improves lives of tribal cultures.
· Improving fish passage is good for fish and people too, more fish catch. Eg: Hilsa fish catch in India and West Bengal.
Negative:
· The fishes that do make it through do so in numbers far less than stated targets.
· Uncertainty in returning to their original habitat.
· It is almost impossible to predict the behaviour of fish and quite impossible to anticipate the vagaries of water.
· Frequent clogging up or obstruction of the fish passage facility.
· The new fish pass on the Ganga will cover only 8 metres, a tiny fraction of the Ganga’s width at Farakka. A small number of the hilsa might well sneak through.
Sandeep 5 years
Kindly review
IAS Parliament 5 years
Good
answer. Keep Writing.
Nandadeep 5 years
Kindly review.thanks
IAS Parliament 5 years
Good
answer. Keep Writing.
