PSEB Solutions for Class 9 Agriculture Chapter 10 Fishery

PSEB Solutions for Class 9 Agriculture Chapter 10 Fishery

PSEB 9th Class Agriculture Solutions Chapter 10 Fishery

→ Fish farming or fishery is a subsidiary occupation and is more profitable than agriculture.

→ Indian breeds of fish are Catla, Rohu, Mrigal.

→ Exotic carps – Common carp, silver carp, Grass carp.

→ The fish pond should be made in clayey land.

→ Pond size should be 1-5 acres and it should be 6-7 feet deep.

→ Keep water level in pond upto 5-6 feet.

→ The pH of the water should be 7-9. If it is less than 7 use lime water.

→ Put seed fish of 1-2 inch size at the rate of 4000 per acre.

→ Seed fish can be put in the following ratio:

  • Katla 20%, Common carp 20%, Mrigal 10%, Rohu 30%, Silver carp 10%, and Grass carp 10%.
  • Katla 25%, Mrigal 20%, Rohu 35%, Common carp 20%.

→ There should be 25% protein in fish feed.

→ 500-gram fish is ready for marketing.

→ One should get training before starting the occupation of the fishery.

PSEB 9th Class Agriculture Guide Fishery Important Questions and Answers

Multiple Choice Questions:

1. When is fish ready for marketing?
(a) 500 gram
(b) 50 gram
(c) 10 gram
(d) 20 gram
Answer:
(a) 500 gram

2. Weed fish is :
(a) Katla
(b) Mrigal
(c) Puthi Kangi
(d) Rohu
Answer:
(c) Puthi Kangi

3. Put seed fish at the rate of ……………. per acre.
(a) 4000
(b) 15000
(c) 1000
(d) 500
Answer:
(a) 4000

4. Carnivorus fish is :
(a) Singhara
(b) Malhi
(c) Dola
(d) All
Answer:
(d) All

5. pH of water for fish rearing :
(a) 7-9
(b) 2-3
(c) 13-14
(d) 11-12
Answer:
(a) 7-9

True/False:

1. Indian breeds of fish are-Catla, Rohu, Mrigal.
Answer:
True

2. Pond size should be 1-5 acre and it should be 6-7 feet deep.
Answer:
True

3. Keep water level in pond upto 2-3 feet.
Answer:
False

4. There should be 10% protein in fish feed.
Answer:
False

5. One should not get training before starting the occupation of the fishery.
Answer:
False

Fill in the Blanks:

1. Put seed fish of 1-2 inch size at the rate of …………… per acre.
Answer:
4000

2. …………… gram fish is ready for marketing.
Answer:
500

3. Fish farming or fishery is a subsidiary occupation and is more …………… than agriculture.
Answer:
profitable

4. Fish pond should be made in …………… land.
Answer:
clayey

5. pH of the water should be …………… If it is less than 7 use lime water.
Answer:
7-9

Agriculture Guide for Class 9 PSEB Fishery Textbook Questions and Answers

(A) Answer in 1-2 words:

Question 1.
Name two exotic breeds of fish.
Answer:
Common carp, silver carp.

Question 2.
What should be the depth of the pond?
Answer:
It should be 6-7 feet.

Question 3.
What should be the pH of water for fish rearing?
Answer:
pH should be between 7-9.

Question 4.
Which fertilizer can be used in the new fish pond?
Answer:
Urea and single superphosphate.

Question 5.
How many fingerlings can be put in one acre?
Answer:
4000 fingerlings per acre.

Question 6.
What is the source of fish seed?
Answer:
College of fishery, GADVASU, Ludhiana or Government hatcheries.

Question 7.
Name two Indian breeds of fish.
Answer:
Katla, Rohu.

Question 8.
What type of soil is required for fish pond?
Answer:
Clayey soil.

Question 9.
What should be the size of commercial fish pond?
Answer:
1 to 5 acre and 6-7 feet deep.

Question 10.
Name one carnivorous fish.
Answer:
Malhi, Singhara.

(B) Answer in 1-2 sentences:

Question 1.
Name Indian and Exotic breeds of fish.
Answer:
Indian breeds of fish are – Katla, Rohu, Mrigal. Exotic carps, Common carp, Silver carp, Grass carp.

Question 2.
What do you know about design of fish pond?
Answer:
For commercial fishery, pond should have an area of.l to 5 acre and it should be 6-7 feet deep. Base of the pond should be plain but sides should be sloppy. There should be proper arrangement of inflow and outflow of water. Put values on inlet and outlet pipes for this purpose. Make pond in February and put fish seed in it in March-April. There should be a one Kanal nursery pond also.

Question 3.
Explain about the quality of water used for fishery.
Answer:
Water used in the pond for fishery should have pH between 7-9. Oxygen dissolved in water and pH of water plays an important role in the survival and growth of fish. If pH of pond water is below 7 then add ground calcium carbonate (80-100 kg per acre) in the pond water. Dissolve this calcium carbonate in water outside the pond and when it is cool then add this in pond.

Question 4.
What should be the ratio of different fish breeds in a pond?
Answer:
Seed fish can be put in the following ratio :

  • Katla 20%, Common carp 20%, Mrigal 10%, Rohu 30%, Silver carp 10%, and Grass carp 10%.
  • Katla 25%, Mrigal 20%, Rohu 35% and Common carp 20%.

Question 5.
How weeds can be removed from fish pond?
Answer:
Water level should be kept upto 5-6 feet in old ponds to check the growth of weeds. Following methods can be used to control weeds :

  • Physical approach. Remove all the water from the pond and remove all the weeds using barbed wire.
  • Biological approach. Grass carp and silver carp can control many types of weeds.

Question 6.
Write precautions for using canal water in the pond.
Answer:
If the pond is to be filled with canal water then wire mesh should be put at the mouth of the inlet pipe. This prevents the entry of carnivorous fish in the fish pond.

Question 7.
Write about enemies of fish in pond.
Answer:

  • Carnivorous fish – Malhi, Singhara.
  • Weed fish – Shisha, Puthi Kanghi.
  • Frogs and Snakes.

Question 8.
How feeding is done in pond?
Answer:
There should be’25% protein in fish feed. Finely ground the feed and soak it in water for 3-4 hours. Make bolls of this feed. Put these in baskets, trays or plastic bags having holes. Keep these at 2-3 feet below the water level.

Question 9.
Write about health management of fish.
Answer:
Dip the fish seed (fingerlings) in solution of potassium permanganate (100 gram per litre) before putting them into the pond. This helps in preventing the diseases. Monitor the fish stock for health related problems at fortnight interval.

Question 10.
From where fishery training can be obtained?
Answer:
It can be obtained from District Fishery Officer, Deputy Director, GADVASU Ludhiana, Deputy Director, Krishi Vigyan Kendra.

(C) Answer in 5-6 sentences:

Question 1.
Write a note on selection of site, design and digging of fish pond.
Answer:
Selection of site for pond. Select a land which have clayey soil for making pond. Clayey soil prevents the seepage of water. Do puddling in light soil. Water source should be near the pond so that it can be filled easily. If canal water is to be used put wire mesh at the mouth of inlet pipe to prevent entry of carnivorous fish into the pond. Design and digging. For commercial fishery, pond should have an area of 1 to 5 acre and it should be 6-7 feet deep. Base of the pond should be plain but sides should be sloppy. There should be proper arrangement of inflow and outflow of water. Put valves on inlet and outlet pipes for this purpose. Make pond in February and put fish seed in it in March-April. There should be a one Kanal nursery pond also.

Question 2.
How old ponds can be used for fish rearing?
Answer:
Water level should be kept upto 5-6 feet in old ponds to check the growth of weeds. Following methods can be used to control weeds :
1. Physical approach. Remove all the water from the pond and remove all the weeds using barbed wire.
2. Biological approach. Grass carp and silver carp can control many types of weeds.
Control of enemies of fish. Old pond may contain following enemies of fish

  • Carnivorous fish – Malhi, Singhara.
  • Weed fish – Shisha, puthi Kanghi.
  • Frogs and Snakes.

Remove these by using the net and kill the snakes carefully.

Question 3.
How weeds can be removed from old ponds?
Answer:
Do it yourself.

Question 4.
What type of manures and fertilizers are used in fish ponds?
Answer:
Plankton is natural food for fish. To maintain regular supply of plankton in the newly constructed pond. Put farmyard manure, biogas slurry, poultry manure, urea and single superphosphate. Always add fertilizers before 15 days of adding fish seed in the pond. Rate of adding fertilizer in the old pond depends upon the quality of water and production of plankton in it.

Question 5.
What is the role of Government Department of Fishery and Veterinary University in fishery development?
Answer:
Before starting the occupation of fishery get training from Fishery Department, Punjab. Department arranges five day training for this purpose. One can get training from District Fishery Officer, Deputy Director, GADVASU, Ludhiana or from Krishi Vigyan Kendra.

Very Short Answer Type Questions:

Question 1.
When does a fish become marketable?
Answer:
When it becomes 500 gram.

Question 2.
Name a weed fish.
Answer:
Puthi Kanghi.

Question 3.
What is natural food for fish?
Answer:
Plankton.

Question 4.
What should be the depth of pond?
Answer:
6-7 feet.

Question 5.
What types of soil should be selected for making pond for fishery?
Answer:
Clayey soil.

Question 6.
Why do we select clayey soil for pond?
Answer:
Because this type of soil is suitable to hold water for a longer time and seepage is less in it.

Question 7.
In which month pond should be made?
Answer:
In the month of February.

Question 8.
What type of carps can eat weeds?
Answer:
Common carp, silver carp.

Question 9.
Name weed fish.
Answer:
Shisha, Puthi Kanghi.

Question 10.
Carnivorous fish are
Answer:
Singhara, Malta.

Question 11.
If pH of water is less than 7 what should we add?
Answer:
We should add ground calcium carbonate 80-100 kg per acre.

Short Answer Type Question:

Question 1.
Write about catching fish and putting fish seed.
Answer:
When fish attains a weight of 500 grams it becomes marketable. Remove such fish from the pond and put same number and breed of fingerlings in the pond by taking these fingerlings from the nursery.

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