THEORY SOLUTIONS
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FISHERY
(1a)
(i) Fishing Gear: Tools for fishing like rods, nets, and lures.
(ii) Fishing Craft: Boats used for fishing activities.
(1b)
(i) Partial Harvesting: This involves selectively harvesting mature fish from the pond while leaving some behind to continue growing. It allows for continuous production over time.
(ii) Complete Harvesting: In this method, all the fish in the pond are harvested at once. After harvesting, the pond is usually drained, cleaned, and restocked with new fish.
(1c)
(i) Select Broodstock: Pick healthy, mature fish.
(ii) Administer Hormones: Stimulate spawning.
(iii) Collect Eggs and Sperm: From selected fish.
(iv) Fertilize Eggs: Combine eggs and sperm.
(v) Incubate: Hatch eggs in controlled conditions.
(vi) Manage Hatchery: Care for larvae until mature.
(1d)
(i) Appearance: Males and females look different.
(ii) Reproductive Organs: Females have ovaries, males have testes.
(iii) Secondary Traits: Males may have distinct markings or features during breeding.
FISHERIES
(2a)
(PICK ANY FOUR)
(i) Proper transportation techniques to minimize stress.
(ii) Providing adequate oxygen during handling and transport.
(iii) Maintaining water temperature within suitable ranges.
(iv) Avoiding overcrowding to reduce aggression and injuries.
(v) -Handling with care to prevent damage to fins and scales.
(vi) Quarantining new brood stock to prevent introduction of diseases to existing populations.
(2bi)
(PICK ANY FOUR)
(i) Water quality parameters such as pH, temperature, and dissolved oxygen levels.
(ii) Pond size and depth relative to the planned stocking density.
(iii) Availability of suitable fish species for stocking, considering market demand and compatibility.
(iv) Source and quality of fingerlings or juveniles to be stocked.
(iv) Predation risk from birds, mammals, or other aquatic species.
-Environmental conditions such as sunlight exposure and wind direction.
(2bii)
(PICK ANY FOUR. It should match what u picked in 2bi)
(i) Water quality parameters: Proper water quality ensures optimal conditions for fish growth, survival, and health.
(ii) Pond size and depth: Adequate space and depth prevent overcrowding and maintain sufficient oxygen levels for fish.
(iii) Availability of suitable fish species: Selecting appropriate species ensures compatibility with the pond environment and market demand.
(iv) Source and quality of fingerlings: High-quality fingerlings from reputable sources have better growth potential and disease resistance.
(v) Predation risk: Minimizing predation risk protects stocked fish from potential losses.
(vi) Environmental conditions: Considering environmental factors enhances the success of fish stocking and overall pond management.
(2c)
(PICK ANY FOUR)
(i) Fishing rod and reel
(ii) Fishing net
(iii) Fish trap
(iv) Fishing line and hooks
(v) fishing swivel
(vi) bobbers
(2d)
Broadcasting:
(i) It ensures that feed is evenly distributed throughout the pond, maximizing access for all fish.
(ii) Fish have equal opportunity to access feed, minimizing aggressive behavior and competition for food.
(ii) Spot feeding:
(i) It allows for precise delivery of feed to specific areas where fish congregate, ensuring all fish receive adequate nutrition.
(ii) By observing feeding behavior at feeding spots, fish health and appetite can be monitored more effectively, enabling early detection of issues.
WAEC FISHERIES
NUMBER THREE
(3ai)
(PICK ANY FIVE)
(i) Water temperature
(ii) Dissolved oxygen
(iii) pH level
(iv) Ammonia levels
(v) Nitrite levels
(vi) Turbidity
(3aii)
(PICK ANY FIVE)
(i) Water temperature: Thermometer
(ii) Dissolved oxygen: Dissolved oxygen meter
(iii) pH level: pH meter
(iv) Ammonia levels: Ammonia test kit
(v) Nitrite levels: Nitrite test kit
(vi);Turbidity: Secchi disk
(3b)
(PICK ANY FOUR)
(i) Reduced dissolved oxygen levels, leading to suffocation and death of fish
(ii) Accumulation of toxic substances, such as heavy metals, causing poisoning and disease in fish
(iii) Increased turbidity, reducing light penetration and photosynthesis, affecting the entire aquatic ecosystem
(iv) Eutrophication, leading to excessive algal growth and depletion of oxygen
(v) Disruption of the aquatic food chain, affecting the overall health and productivity of the pond
(vi) Increased susceptibility to diseases and infections due to weakened immune systems of fish
(3ci)
(PICK ANY THREE)
(i) Inlet valve or pipe
(ii) Outlet valve or pipe
(iii) Sluice gates
(iv) Overflow structures
(v) Water pumps
(3cii) Five uses of the components of fish ponds:
- Inlet valve/pipe: Regulate the inflow of water into the pond
- Outlet valve/pipe: Control the outflow of water from the pond
- Sluice gates: Manage the water level and prevent flooding or draining of the pond
- Overflow structures: Divert excess water during heavy rainfall to prevent pond overflow
- Water pumps: Move water in and out of the pond, allowing for water exchange and circulation.
WAEC FISHERIES
NUMBER FOUR
(4a)
(PICK ANY THREE)
(i) Maintaining optimal water parameters, such as temperature, pH, dissolved oxygen, and ammonia levels, is crucial for the survival and healthy growth of fish seed.
(ii) Providing the right type, quantity, and frequency of feed to the fish seed ensures they receive adequate nutrition for growth and development.
(iii) Monitoring for and promptly addressing any signs of disease or parasitic infections, and implementing appropriate treatment measures, helps maintain the health and survival of the fish seed.
(iv) Protecting the fish seed from predators, such as birds, larger fish, or other animals, through the use of physical barriers or deterrents, helps ensure their survival.
(4b)
(PICK ANY FOUR)
(i) Outboard motorboat
(ii) Inboard motorboat
(iii) Sailboat
(iv) Canoe
(v) Rowboat
(vi) Trawler
(4c)
(i) Site selection: Choose a suitable location for the fish pond, considering factors like water source, soil type, and accessibility.
(ii) Pond construction: Excavate the pond, shape it, and install necessary infrastructure like inlet and outlet channels.
(iii) Water management: Fill the pond with water and maintain the desired water level and quality.
(4d)
(PICK ANY FOUR)
(i) Aerators
(ii) Water test kits
(iii) Weighing scales
(iv) Nets
(v) Liming materials
(vi) Fertilizers
FISHERY-OBJECTIVES SOLUTION
01-10: BBDBBCBDDA
11-20: BCCCDCCBDA
21-30: DBABCCCDCC
31-40: AADADDACAC