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Which of the following activitie(s) is/are responsible for the decrement in the economic output from inland fishery?
1. Discharge of untreated effluents from the industrial units and urban silage which destroy the fish.
2. Construction of dams prevents the free migration of fish to their usual breeding and feeding grounds.
3. Deforestation and frequent flooding due to poor watershed management. 
Select the correct answer using the code given below:
  • a)
    1 and 2 only
  • b)
    1 only
  • c)
    3 only
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following activitie(s) is/are responsible for the decreme...
Option 1 - due to the discharge untreated effluents to the which is toxicant kills life in water.
Option 2 - construction of dam limits area of the movement.
Option 3 - Deforestation leads to the extinguish of water and flooding will take away the animals to the shore and will lead to the death of fishes.
Free Test
Community Answer
Which of the following activitie(s) is/are responsible for the decreme...
Inland Fishery
The reasons are:

• Discharge of untreated effluents from the industrial units and urban silage destroy the fish by clogging their respiratory organs. Also fish exposed to industrial effluent induce a greater risk of oxidative stress with a resultant increased level of lipid peroxides. Consequently, if these fish with increased oxidative species are ingested by humans, they may cause physiological problems such as cardiovascular diseases and cancer involving disruption of cellular homeostasis.
• Construction of dams, reservoirs prevents the free migration of fish to their usual breeding and feeding grounds and thus adversely affects the stock of fish in rivers. Also water temperature changes have often been identified as a cause of reduction in native species, particularly as a result of spawning success .eg: Coldwater release from high dams of the Colorado River has resulted in a decline in native fish abundance.
• Deforestation leads to loosening of soil thus facilitating frequent flooding in cases of poor watershed management. In some cases, floods lead to a decline in fish population. In these situations, fewer young fish survive than normal, as the offspring are isolated by the retreating waters after the flood. But such declines are more common in fastermoving rivers. 
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Which of the following activitie(s) is/are responsible for the decrement in the economic output from inland fishery?1. Discharge of untreated effluents from the industrial units and urban silage which destroy the fish.2. Construction of dams prevents the free migration of fish to their usual breeding and feeding grounds.3. Deforestation and frequent flooding due to poor watershed management.Select the correct answer using the code given below:a)1 and 2 onlyb)1 onlyc)3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following activitie(s) is/are responsible for the decrement in the economic output from inland fishery?1. Discharge of untreated effluents from the industrial units and urban silage which destroy the fish.2. Construction of dams prevents the free migration of fish to their usual breeding and feeding grounds.3. Deforestation and frequent flooding due to poor watershed management.Select the correct answer using the code given below:a)1 and 2 onlyb)1 onlyc)3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following activitie(s) is/are responsible for the decrement in the economic output from inland fishery?1. Discharge of untreated effluents from the industrial units and urban silage which destroy the fish.2. Construction of dams prevents the free migration of fish to their usual breeding and feeding grounds.3. Deforestation and frequent flooding due to poor watershed management.Select the correct answer using the code given below:a)1 and 2 onlyb)1 onlyc)3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following activitie(s) is/are responsible for the decrement in the economic output from inland fishery?1. Discharge of untreated effluents from the industrial units and urban silage which destroy the fish.2. Construction of dams prevents the free migration of fish to their usual breeding and feeding grounds.3. Deforestation and frequent flooding due to poor watershed management.Select the correct answer using the code given below:a)1 and 2 onlyb)1 onlyc)3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
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