SS 1 Third Term Agricultural Science Lesson Note – Aquaculture

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CLASS: SS 1

TOPIC:           AQUACULTURE

CONTENT: 1. Meaning and Importance of Aquaculture

2. Different Types of Aquaculture
3. Sitting of Fish Farm and its Regulation
4. Fishing Methods and Tools

SUB TOPIC 1:

Meaning and Importance of Aquaculture

The term fish is applied to a variety of cold-blooded, water-dwelling (aquatic) animals that belong to the phylum Chordata. Fishes belong to four different classes consisting of bony, cartilaginous, jawless and fleshy-finned fishes.

Aquaculture/Fish farming is the propagation and husbandry of aquatic organisms in artificial water bodies for commercial, recreational and scientific purposes. Aquaculture refers to both marine and fresh water species and can range from land based to open ocean production of fish, shrimp, and other aquatic animals.

 IMPORTANCE OF AQUACULTURE

1. It is a source of protein man and livestock diets
2. It provides employment and income to farmers
3. Fishes are useful for educational purpose to students and researchers
4. It provides a means of recycling domestic waste such as animal dung
5. It serves as source of foreign exchange through exportation of fish and fish products
6. Fish oil serve as food and is also used in the manufacture of soaps
7. Fish farming encourages the economic use of land
8. it is used as tourist and entertainment
9. it can be consumed by all categories of people, since it has no religion and traditional limitation.

 TYPES OF AQUACULTURE

There are different types of aquaculture. These are

1. Fishery
2. Shrimps rearing
3. Crab rearing
4. Cray fish rearing
5. Lobster rearing
6. Prawn rearing
7. Oyster shell rearing
8. Marine snail rearing
9. Squid rearing
10. Mussel rearing
11. Clam rearing
12. Octopus rearing
13. Rearing of aquatic mammals such as whales etc
14. periwinkles rearing.

 FISH FARMING: This is the act of rearing selected fish species in enclosed bodies of water such as ponds, lakes, streams, rivers for food or other useful purposes.

CLASSIFICATION OF FISH:

Classification of fish: Fish can be classified into two based on

• Habitat and
• (II) Morphology (structure).

CLASSIFICATION BASED ON HABITAT.

A .Fresh water fish: These are fishes that can successfully live and reproduce only in salt free water such as ponds ,lakes, streams, rivers, swamps e.t.c. Examples of fresh water fish are tilapia, cat fish, Nile perch, mud fish, moon fish, pike, carp, trout  e.t.c.

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