2024 WAEC FISHERY: 2024 WAEC Fishery essay and obj (3985)

FISHERIES

01-10: CBDADCCCAB

11-20: CACBCBDAAC

21-30: BCDACCCDBB

31-40: DCDCABAAAC

COMPLETED

(5a) 

(PICK ANY TWO)

(i) Pond seining

(ii) Cast netting

(iii) Gill netting

(iv) Hand netting

(5bi)

(PICK ANY FIVE)

(i) Gutting

(ii) Filleting

(iii) Drying

(iv) Smoking

(v) Canning

(vi) Freezing

(5bii)

(PICK ANY THREE)

(i) Salting

(ii) Drying

(iii) Smoking

(iv) Fermentation

(5biii)

(PICK ANY THREE)

(i) Refrigeration

(ii) Vacuum packing

(iii) Chemical preservatives

(iv) Irradiation

(v) High-pressure processing

(5c)

(i) Poor water quality, such as high levels of ammonia, nitrites, or low dissolved oxygen can kill fish fry.

(ii) Change in temperature can shock fish fry and potentially cause death.

(iii) Predation by larger fish, birds, or other aquatic organisms.

(iv) Diseases and parasitic infections which can lead to death.

(v) Inadequate feeding practices can result in malnutrition leading to increased mortality.

(5d)

(PICK ANY ONE)

Algal bloom in fisheries refers to excessive growth of algae in water due to human activities, impacting fish populations through toxins, oxygen depletion, and disruption of the food web.

OR

Algal bloom refers to the rapid and excessive growth of algae in bodies of water, such as oceans, lakes, or rivers.

(6a)

[PICK ANY FOUR]

(i) Poor quality water in the pond or aquarium

(ii) Overcrowding of fish in the pond or aquarium

(iii) Poor water management practices such as inadequate filtration and aeration

(iv) Disease outbreaks among the fish

(v) Predation by other animals such as birds or mammals

(vi) Feed management issues such as poor nutrition or overfeeding

(6bi) 

[PICK ANY ONE]

(i) Adding agricultural lime or dolomite to the water to increase its alkalinity

(ii) Installing aeration devices to increase oxygen levels in the water

(iii) Changing the water more frequently to dilute the acidic components

(iv) Avoiding the use of acid-based fertilizers near the pond area

(v) Adding crushed oyster shells or coral to the pond to increase alkalinity

(vi) Monitoring and adjusting the water chemistry regularly to maintain optimal conditions

(6bii)

[PICK ANY THREE]

(i) Agricultural lime

(ii) Dolomite

(iii) Ash from wood or rice husks

(iv) Crushed coral or shell

(vi) Sodium bicarbonate (baking soda)

(vi) Calcium carbonate (chalk or limestone)

=========================

(4ai)

(PICK ANY ONE)

Fish pond fertilization refers to the practice of adding nutrients to a fish pond to enhance the growth of phytoplankton and zooplankton, which serve as a natural food source for fish.

OR

Fish pond fertilization is addition of nutrients to enhance plankton growth, promoting a healthy food chain, and increasing fish production in aquaculture systems.

(4aii)

(PICK ANY THREE)

(i) It is essential to assess the existing water quality in the pond before applying any fertilizers.

(ii) The size and depth of the pond play a role in determining the amount of fertilizer needed.

(iii) The number of fish stocked in the pond is a critical consideration.

(iv) It is important to select a suitable type of fertilizer that provides the necessary nutrients for the pond and the fish.

(v) Fish farmers should consider the potential environmental impact of fertilizers on the surrounding ecosystem.

(4b)

(PICK ANY THREE)

(i) Low levels of dissolved oxygen can lead to increased stress among fish. 

(ii) It limit their ability to efficiently convert food into energy, resulting in slower growth rates.

(iii) Low dissolved oxygen can cause fish to exhibit abnormal behavior.

(iv) Low dissolved oxygen can contribute to the increase of harmful algal blooms.

(v) It can lead to disturbed aquatic ecosystem

(4c)

(i) It allows for better distribution of nutrients from uneaten feed and fish accumulated waste throughout the pond, benefiting the overall ecosystem and promoting natural nutrient cycling.

(ii) Allowing some time between feeding and water drainage helps maintain more stable water conditions

(4d)

(i) Inshore fisheries

(ii) Offshore fisheries

(iii) Deep-sea fisheries

(4e)

(PICK ANY FOUR)

(i) Natural water sources

(ii) Rainwater

(iii) Groundwater

(iv) Surface runoff

(v) Irrigation canals

(vi) Water reservoirs

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