FISHERY WAEC 2020 PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO
Wednesday, 9th September 2020
Fishery (Alternative A&B) 3 (Practical)
9:30am – 11am.
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FISHERY SOLUTIONS
1ai)
Blood Flagellates – Normally aquarium fish are not affected by this. This disease consists of single-celled organisms with hair-like flagellae
1aii)
i) maintain good fish nutrition
ii) avoid over-crowding
iii) maintain good personal hygiene
iv) hand-washing with antibacterial soaps
1aiii)
i) to avoid loss of Weight by fish
ii) to avoid spread of Disease among stock
iii) maintain good fish nutrition
iv) prevent Bacterial Infections amongst fish
1bi)
chopping down brush to create fish habitats
bii)
i) do not use the Cutlass for prying
ii) Handle with Care
ii) Specimen is has sharp edges which must not come in contact with skin to avoid cut
1biii)
Choose any 2
i) Always thoroughly dry your Cutlass after it has had any contact with liquid or moisture.
ii) When storing, keep your machete in a dry environment, as humidity will damage the blade. If rust does begin to develop, clean it off as soon as you can to prevent further damage.
iii) Plastic handles are fairly maintenance-free. Wooden handles, which can crack or warp when exposed to moisture, can be kept in good condition by periodically applying lemon oil or furniture polish.
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(2a)
(i) Mechanical driers.
(ii) Vertical Plate Freezer.
(iii) Horizontal plate freezer.
(iv) Air Blast Freezer.
(2b)
(i) Hand trowels are used for loosening the soil around plants in Vegetable farming.
(ii) Head Pan
The use of this farm tool is employed for the collection of some harvested crops, transportation of small farm inputs and outputs, and the mixing of manure and fertilizer.
(2ci) scale of Fish serves as Protection
(2cii) Fish gill –
These filaments have many functions including the transfer of ions and water, as well as the exchange of oxygen, carbon dioxide, acids and ammonia.
(2d)
(i) Wood
(ii) Kilns
(iii) Coconut husk
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(3ai)
(i) Specimen J – pond fertilisers
(ii) Specimen k – pond conditioning through liming to increase fish production through an improved supply of natural food such as phytoplankton and zooplankton.
(iii) Specimen L- used to increase the growth of fish during the short period by increasing nitrogen level
(3aii)
(i) To increase fertility in the pond.
(ii) To promote the growth of planletons.
(iii) It makes fish to grow faster.
(3bi)
(i) Kills harmful animals and plants.
(ii) promote the growth of planletons.
(iii) Enhances the utilization and release of certain elomes.
(iv) reduces Acidity in the pond.
(3bii)
(i) Increases turbidity.
(ii) Aids Calcium ions to the pond.
(3c)
(i) It is inorganic in nature.
(ii) It promote the growth of planletons in time.
(iii) it does not promote high turbidity.
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(4a)
(i) C – Fish cages
(ii) N – Fish pond
(4b)
(i) Presence of Nostrils.
(ii) Presence of operculum.
(iii) Presence of dorsal, pelvic and candal fin.
(iv) Presence of literal lines.
(v) Anus present on both specimens.
(4c)
TABULATE
CATFISH
(i) Has Barbels.
(ii) Rayed Dorsal fins.
(iii) Scales absent.
(iv) Has two pairs of Nostrils.
(v) Has one lateral line.
TILAPIA
(i) Bartels Absent.
(ii) Spiny Dorsal fins.
(iii) Scales present.
(iv) has only one pair.
(v) Has two lateral lines
(4d)
(i)Early/Fast maturity
(ii)Have high resistance to disease
(iii)Acceptable to consumers
(iv)Ability to breed in high capacity
(v)Ability to tolerate poor water quality
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(4a)
(i) C – Fish cages
(ii) N – Fish pond
(4b)
(i) Presence of Nostrils.
(ii) Presence of operculum.
(iii) Presence of dorsal, pelvic and candal fin.
(iv) Presence of literal lines.
(v) Anus present on both specimens.
(4c)
TABULATE
CATFISH
(i) Has Barbels.
(ii) Rayed Dorsal fins.
(iii) Scales absent.
(iv) Has two pairs of Nostrils.
(v) Has one lateral line.
TILAPIA
(i) Bartels Absent.
(ii) Spiny Dorsal fins.
(iii) Scales present.
(iv) has only one pair.
(v) Has two lateral lines
Wednesday, 9th September 2020
Fishery (Alternative A&B) 3 (Practical)
9:30am – 11am.
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