Question 3
(a) (i) List four methods involved in capture fisheries.
(ii) Mention four facilities which could be used to rear fish.
(iv) Distinguish between fish food and fish feed. [10 marks]
(b) (i) A farmer cultivated Tilapia and Clarias sp in a pond at the same time.
What type of aquaculture was practiced?
(ii) Mention four materials that could be used to package smoked fish for marketing.
(c)List five causes of pollution in water bodies. [5 marks]
Observation
This was a popular question among the candidates, as majority of them attempted it. However, their performance was fair.
In part (a), majority of the candidates misunderstood it for gear, instead of methods. Also, majority of the candidates could not distinguish between fish food and fish feed.
In part (b), majority of the candidates were able to mention the type of aquaculture being practiced.
In part (c), majority of the candidates were able to list five causes of water pollution in water bodies.
The expected answers include:
(a) (i) Methods in capture fisheries- hook and line
- cast netting/drag netting
- set netting/gill netting
- trawling
- trapping
- purse seining/seining
- harpooning/spearing
- hand picking
(ii)Facilities for rearing fish
- earthern pond
- concrete tanks
- fibre glass tanks
- plastic tanks
- tarpaulin tanks
- wooden tanks
- fish cage/happa
- fish pen
(iii) Distinction between fish food and fish feed
Fish food refers to naturally occurring organisms in water bodies such as plankton which fish feed upon while fish feed refers to artificially formulated/compounded feed obtained through the combination of ingredients
b(i)Type of aquaculture practiced
- polyculture
(ii)Fish packaging materials
- polythene bags
- baskets
- cartons/papers
- aluminium foils
- leaves
- boxes/crates
(c)Causes of water pollution in water bodies
- sewage
- debris/refuse
- lost nets
- plastics
- poisons/agrochemicals
- industrial effluents
- explosives
- kitchen waste
- household refuse/human waste
- oil spillage
- detergents