2024 WAEC Fisheries Alt B Practical Answers

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*FISHERIES

(1ai)
Specimen A (Maize grains): Carbohydrates (energy)
Specimen B (Groundnut cake): Protein
Specimen C (Bone meal): Calcium (minerals)

(1aii)
Specimen A (Maize grains): Energy source for growth and maintenance
Specimen B (Groundnut cake): Protein source for growth and development
Specimen C (Bone meal): Calcium source for bone growth and development

(1aiii)
Specimen A (Maize grains): Sorghum or other grains
Specimen B (Groundnut cake): Soybean meal or other protein sources
Specimen C (Bone meal): Fish bone meal or other calcium sources

(1b)
(i)Vitamins
(ii)Phosphorus

(1ci)
(i)Protection (scales provide a protective barrier against the environment and predators)

(1cii)
(i)Used in the production of fish meal or fish oil
(ii)Used as a source of collagen for pharmaceutical or cosmetic applications
(iii)Used as a natural fertilizer or compost ingredient

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(2a)
Specimen E – active fishing gear
Specimen F – passive fishing gear
Specimen G – active fishing gear
Specimen H – passive fishing gear
Specimen J – active fishing gear

(2b)
(PICK ANY FOUR)
(i) Monofilament line
(ii) Braided line
(iii) Fluorocarbon line
(iv) Netting twine
(v) Gaff hooks.

(2c)
specimen H

(2d)
(PICK ANY FIVE)
(i) Specimen E is a hook with a line that is cast into the water, while Specimen F is a net that is set in the water to catch fish.
(ii) Specimen E is commonly used by recreational fishers, while Specimen F is used by commercial fishers since it requires skills to operate
(iii) Specimen E is an active fishing gear, while Specimen F is a passive fishing gear.
(iv) Specimen E is more targeted at fish species like Tuna while specimen F is used for small fish that could slip through its mesh size
(v) Specimen E is more expensive than Specimen F
(vi) Specimen E is a smaller size gear compared to Specimen F.

(3ai)
(PICK ANY THREE)
(i) Scraping off any fouling organisms that may attach on the paddle.
(ii) Repainting the paddle to prevent rusting and wearing out.
(iii) Checking the paddle regularly to ensure it is in good working condition.
(iv) Applying anti-fouling paint to the paddle to prevent the growth of marine organisms

(3aii)
(PICK ANY TWO)
(i) Hand net
(ii) Scoop net
(iii) Seine net
(iv) Gill net

(3b)
(i) Broadcasting
(ii) Spot application

(3c)
(PICK ANY FOUR)
(i) It can cause an increase in the growth of algae, which can lead to a decrease in water quality.
(ii) It can lead to an increase in the concentration of ammonia, which can be toxic to fish.
(iii) It can lead to an increase in the concentration of nitrates, which can be harmful to fish health.
(iv) It can lead to a decrease in the concentration of dissolved oxygen, which can be fatal to fish.
(v) It can lead to a change in the pH of the water, which can be stressful to fish.

(3d)
(PICK ANY FOUR)
(i) Cow dung
(ii) Pig manure
(iii) Rabbit manure
(iv) Compost
(v) Vermicompost

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*WAEC FISHERY PRACTICAL*

*NUMBER FOUR*

(4a)
(i)Exceptional fertility
(ii)Rapid breeding capabilities
(iii)Robust immune system

(4b)
[Diagram]

(4c)
(i)Dehydrating
(ii)Chilling
(iii)Pickling
(iv)Powdering

(4d)
(i)Unreliability of their genetic makeup
(ii)Risk of introducing diseases or parasites to farmed fish
(iii)Potential for unpredictable growth rates and quality