Give the merits and demerits of fish culture? - Science

Answer in Brief

Give the merits and demerits of fish culture?



Culture fishery is a kind of business and research activity concerned with the culturing, feeding, breeding and production of fishes in marine and freshwater ecosystems. The basic advantage (merit) of fish culture is that it decreases our dependence on natural sources of fish. We can obtain fish of desired species is desired numbers by aclturing them.
Some merits of culture fishery are :

  1.  Fish as food: Various species of fish are cultivated extensively as food. Some of the species grown are rohu, mrigal, catla etc.
  2.  Fish for controlling diseases: Various fish species are, reared to control diseases like malaria, yellow fever etc. The larvivorous fishes like Gambusia are reared which eat up the larvae of mosquitoes and prevent the spreading of disease.
  3. Economic value: Besides fishes, various oysters are also reared in culture fishery. These oysters are cultivated for pearls they make, which are of high economic importance.
  4. Source of income: The fishing industry has brought a lot of income to the farmers in particular and the country on the whole. Blue Revolution is also gaining popularity on the same lines as the “green revolution.
  5. Fishes are also reared for other by-products like fish oil, manure, glue, leather etc. Thus, fish farming is advantageous, economical and profitable from a business point of view. There are however certain problems or demerits associated with fash farming/culture fishery. They are :
    • It poses a threat to biodiversity. Only economically important and valued fishes are grown ( fish monoculture) which leads to the extinction of rare and economically less important fishes.
    •  Sometimes, such exotic species are introduced which cause the extinction of local fish species.
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Chapter 15: Improvement In Food Resources - Long Answer Questions [Page 91]


NCERT Exemplar Science Class 9
Chapter 15 Improvement In Food Resources
Long Answer Questions | Q 40. | Page 91


What are the advantages of composite fish culture?

How do you differentiate between capture fishing, mariculture and aquaculture?

Mention four advantages of fishery.

What are the advantages of composite fish culture?

How do you differentiate between capture fisheries, inland fisheries and aquaculture?

Give the economic importance of fishery.

Describe various methods of fish preservation.

______ is the method of culturing different variety of fish in a water body.

All of the following are marine fish EXCEPT

Find out the wrong statement from the following

Which one of the following fish is a surface feeder?

Preventive and control measures adopted for the storage of grains include

Differentiate between the following

Capture fishery and Culture fishery

What do you understand by composite fish culture?

Management and rearing of fishes only is called as:

What type of cartilage forms the whole of the adult skeleton of cartilaginous fishes?

Which one is not produced in aquaculture?

Air-breathing fishes are cultured in ______ water.

Culture of fishes along with Agricultural crops is known as ______.

The longest marine water prawn is ______.

The eggs released by the female fish are fertilized by the sperm and fertilized eggs float in water as ______.

The hatching period in Hatchling pits is ______.

PUFA stands for ______.

Define the following.


Blue revolution is related with ______.

How is the Fish Meal prepared?

Enumerate the nutritional values of prawns.

Which one of the following is a marine fish?

What is aquaculture? Give example of an animal that can be multiplied by aquaculture.

Differentiate between pisciculture and aquaculture.

Explain the concept of the Blue Revolution.

Name the following:

Transgenic fish.


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