RISK FACTORS IN WATER AND FISH FARMING

Subject : Agricultural Science

Class : Jss 2 / Basic 8

Term : Third Term / 3rd Term

Week : Week 5

Topic : RISK FACTORS IN WATER AND FISH FARMING

Previous Knowledge : Learners have been taught

PRESERVATION OF FISH

in their previous lesson .

Behavioural Objectives : By the end of the lesson , learner will be able to

• List the risk Factors in Water and Fish Farming
• Mention types of fishing tools

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RISK FACTORS IN WATER AND FISH FARMING

CONTENT

1. Risk Factors in Water and Fish Farming
2. Fishing Tools

Risk Factors in Water and Fish Farming

These have to do with factors that are capable of causing water pollution and danger to fish and other aquatic organisms. Some of the risk factors in water and fish farming include:

1. Use of chemicals

When residues of these chemicals used by farmers in farming activities are washed by rain water into a nearby river, stream, pond etc. that body of water will be contaminated and the lives of the fish in such water body will be at risk.

2. Discharge of petroleum oil into water bodies

Accidental or deliberate discharge of petroleum oil into water bodies can be a major risk factor in marine ecosystem

3. Industrial effluents and sewage discharge

Industrial effluents discharged from food processing plants, paper mills, breweries, tanneries etc. into small and large water bodies can pollute the fish environment and have negative impact on aquatic ecosystem.

4. Domestic waste

Waste water resulting from domestic sewage (human faeces and urine, small washing, food processing or preparation and cleaning of utensils) that are in most cases channeled into water bodies can cause depletion of oxygen

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Fishing Tools

The fishermen used different types of fishing in Nigeria. The most common ones among others are:

1. Hooks and Lines or Rod and Line
2. Nets (Cast and Throw Nets, Gill Nets, Seine Nets, Lift Nets, scooping net, clap net)
3. Spears (Harpoons)
4. Gourds
5. Fishing Cages
6. Baskets
7. Pots
8. Fishing spears
9. Fishing trap

EVALUATION

1. Explain the following risk factors in water and fish farming.

(i) Accidental discharge of petroleum oil into water bodies.

(ii) Use of chemicals such as Gamalin 20 to harvest fish

2. Mention six fishing tools