2024 NECO FISHERIES: Fisheries (Fishery) NECO Practical Authentic Answers 2025 (3565)

1ai)

A - Heterobranchus longifilis (Catfish)
B - Tilapia zilli (Red-bellied tilapia)
C - Hydrocynus forskalii (Tiger fish)
D - Hepsetus odoe (African pike)

(1aii)


(1aiii)
-Similarities- 

(PICK ANY SIX)

(i) Both are fish species.
(ii) Both have gills for respiration.
(iii) Both have scales on their bodies.
(iv) Both have anal and dorsal fins.
(v) Both have a lateral line.
(vi) Both are found in freshwater environments.
(vii) Both have a streamlined body shape.
(viii) Both are important food sources.

DIFFERENCES

-Specimen A-

(PICK ANY TWO)

(i) Has a flat, smooth skin with no scales.
(ii) Has a long, narrow body.
(iii) Has a large, bony 'copied from e x a m p l a z a . c o m free' head.
(iv) Has barbels (sensory whiskers) around its mouth.
(v) Feed omnivorously.

-Specimen B-

(PICK ANY TWO)

(i) Has small, round scales covering its body.
(ii) Has a shorter, more rounded body.
(iii) Has a small, rounded head.
(iv) Has no barbels around its mouth.
(v) Feed herbrivorously.

(1bi)

-Types of scale possessed-
B - Ctenoid scales
C - Cycloid scales

-Shape of tail fin possessed-
B - Rounded tail fin
C - Forked tail fin

(1bii)

(PICK ANY TWO)

(i) Formalin preservation
(ii) Glycerol preservation
(iii) Freezing
(iv) Drying
(v) Salting
(vi) Alcohol preservation

(2a)

E - Spear
F - Basket
G - Scoop Net
H - Plankton net

(2bi)

(PICK ANY THREE)

(i) Both are used for collecting aquatic organisms.
(ii) Both are hand-held devices.
(iii) Both are made of mesh.
(iv) Both require regular maintenance and cleaning.
(v) Both are used in water sampling.
(vi) Both can cause damage to aquatic organisms if not used properly.

(2bii)

(PICK ANY THREE)

(i) Inspect the spear for damages regularly.
(ii) Sharpen the spear if it becomes dull.
(iii) Store the spear in a dry place when not in use.
(iv) Use the spear responsibly and carefully.
(v) Clean and disinfect the spear after each use to prevent the spread of diseases.
(vi) Report any damages or accidents to the appropriate authorities.

(2biii)

(PICK ANY TWO)

(i) Bamboo
(ii) Rattan
(iii) Plastic
(iv) Willow
(v) Fabric
(vi) Wire mesh

(3ai)

I - Weighing scale
J - Measuring tape 
K - Aquarium 

(3aii)
I: 

(PICK ANY ONE)

(i) It is used to measure the weight of fish caught.
(ii) It is used to ensure fish are sorted according to weight categories.

J: 

(PICK ANY ONE)

(i) It is used to measure the size of fish caught.
(ii) It is used to ensure fishing nets comply with legal mesh size regulations.

K: 

(PICK ANY ONE)

(i) It is used to create a controlled environment for keeping and displaying aquatic animals and plants.
(ii) It is used for educational purposes, allowing people to learn about marine life and ecosystems.

(3aiii)
J:

(PICK ANY THREE)

(i) Ensure the weighing scale is calibrated for accurate measurements.
(ii) Keep the weighing platform clean to avoid inaccuracies.
(iii) Place the scale on a flat, stable surface.
(iv) Do not exceed the scale’s maximum weight limit.
(v) Use the scale in a stable temperature environment to prevent fluctuations.

J:

(PICK ANY THREE)

(i) Ensure the tape is not twisted or damaged.
(ii) Keep 'copied from e x a m p l a z a . c o m free' the tape straight and taut for accurate measurements.
(iii) Avoid using the tape on hot surfaces to prevent warping.
(iv) Retract the tape slowly to avoid injury.
(v) Store the tape in a dry place to prevent rusting or damage.

(3bi)

(PICK ANY FIVE)

(i) Water quality management
(ii) Feeding management
(iii) Tank maintenance
(iv) Health monitoring
(v) Aquascaping
(vi) Species compatibility
(vii) Quarantine procedures

(3bii)

(PICK ANY FOUR)

(i) Calibrate the scale regularly for accuracy.
(ii) Keep the scale clean to prevent measurement errors.
(iii) Handle the scale gently to avoid damage.
(iv) Use the scale on a stable surface for precise readings.
(v) Do not overload the scale to prevent malfunction.
(vi) Store the scale in a dry place to maintain its condition.

(3biii)

(i) Glass
(ii) Acrylic

(3c)
(PICK ANY TWO)
(i) Inches (in)
(ii) Feet (ft)
(iii) Centimeters (cm)
(iv) Meters (m)