Home
Class 9
BIOLOGY
There is mass mortality of fishes in a p...

There is mass mortality of fishes in a pond. What may be the reasons?

Text Solution

Verified by Experts

Hint.
(i) Thermal pollution due to addition of hot water from thermal plant.
(ii) Pouring of industrial waste.
(iii) Passage of pesticide rich water from adjacent agricultural fields.
Promotional Banner

Topper's Solved these Questions

  • NATURAL RESOURCES : OUR ENVIRONMENT

    PRADEEP|Exercise ADDITIONAL QUESTIONS|56 Videos

  • NATURAL RESOURCES : OUR ENVIRONMENT

    PRADEEP|Exercise LONG ANSWER QUESTIONS|18 Videos

  • NATURAL RESOURCES : OUR ENVIRONMENT

    PRADEEP|Exercise NCERT EXEMPLAR PROBLEMS|30 Videos

  • IMPROVEMENT IN FOOD RESOURCES

    PRADEEP|Exercise Model Test Paper|34 Videos

  • THE FUNDAMENTAL UNIT OF LIFE

    PRADEEP|Exercise ANALYTICAL|11 Videos

Similar Questions

Explore conceptually related problems

There is a mass mortality of fish in a pond. What may be the reason?

What is mortality?

What is mortality rate?

At the sweage discharge point of river, high mortality of fishes occured. Choose the most correct reason for this :-

A lake near a village suffered heavy mortality of fishes within a few day. Consider the following reasons for this?

A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?