2023 NECO Fisheries (OBJ & Essay) Answers [4th August]
Get Free Live 2023 NECO June/July Fisheries (FISHRY) OBJ & Essay Questions and Answers Free of Charge | NECO June/July Free Fisheries (Objectives and Theory) Questions and Answers EXPO Room (4th August, 2023).
NECO JUNE/JULY 2023 FREE FISHERIES OBJ & ESSAY (FISHRY) QUESTION AND ANSWER ROOM 
 
Friday 4th August, 2023
Paper III & II: Objective & Essay – Fisheries 10:00am – 12:00noon
 
 

A. 2023 NECO FISHERIES (OBJECTIVES) ANSWERS:

1-10: BCECDCCBBB
11-20: BBBECECAEA
21-30: EEAECDBDBA
31-40: DEBAEACCDC
41-50: EDACCCDEDB
51-60: ABDBDDDEBA

B. 2023 NECO FISHERIES (ESSAY) ANSWERS:

(1ai)
(i) pH regulation
(ii) Algae control
(iii) Nutrient management
(iv) Improved Pond structure

(1aii)
(i) Aquaculture is the cultivation of aquatic animals and plants, such as fish, shellfish, seaweed, and other aquatic species.
(ii) Aquaricuture is the breeding, rearing, and harvesting of aquatic animals and plants in a controlled environment for commercial purposes.

(1bi)
(PICK ANY TWO)
(i) Salting involves the addition of salt alone, while brining is a combination of salt and other ingredients like lemon juice, sugar, spices etc.
(ii) Salting is usually done to enhance the flavor of the fish, while brining is done to preserve the fish.
(iii) Salting is done to the outside of the fish, while brining is done to the inside of the fish.
(iv) Salting takes more time than brining.
(v) The texture of the fish is affected differently by these two processes.

(1bii)
(PICK ANY TWO)
(i) Both processes involve the addition of salt.
(ii) Both processes are used to add flavor to the fish.
(iii) Both processes are used to preserve the fish.
(iv) Both processes are used to increase the shelf-life of the fish.

(1ci)
(PICK ANY THREE)
(i) High water quality
(ii) Minimum waste
(iii) Energy efficiency
(iv) Automation
(v) Cost effectiveness

(1cii)
(PICK ANY THREE)
(i) Earthen ponds have a higher oxygen exchange rate as compared to concrete ponds, allowing for better fish growth.
(ii) Earthen ponds are better at retaining heat than concrete ponds, allowing for faster growth and maturation of fish.
(iii) Earthen ponds can naturally filter out harmful substances from the water, which can help to improve the water quality.
(iv) Earthen ponds are easier and cheaper to maintain than concrete ponds.
(v) Earthen ponds are more natural looking than concrete ponds, making them more visually appealing.
(vi) Earthen ponds provide better habitat for beneficial organisms such as bacteria and microalgae which can help to improve the overall ecosystem of the pond. 

(2ai)

(2aii)
(i)Natural bodies of water like rivers, lakes, or ponds.
(ii)Groundwater from wells or boreholes.
(iii)Rainwater harvesting through ponds or reservoirs.

(2aiii)
Barrage Pond is a type of fish pond constructed by blocking a stream or river's flow with a dam or barrage, creating an enclosed area for fish farming. The water level in the pond is regulated by controlling the gates in the dam, allowing for fish rearing in a controlled environment.

(2aiv)
(i)Both are popular fish species for aquaculture due to their fast growth rates and adaptability to different environmental conditions.
(ii)They are omnivorous, meaning they can eat both plant-based and animal-based food, which makes them relatively easy to feed and manage in fish farming systems.


OR

(2aii)
(i) Rivers or streams
(ii) Lakes or ponds
(iii) Wells or boreholes

(2aiii)
A barrage pond is a type of fish pond that is artificially constructed to store and control water for the purpose of aquaculture.

(2aiv)
(PICK ANY TWO)
(i) Both are freshwater fish species.
(ii) Both can be found in shallow waters.
(iii) Both spawn multiple times within their life cycle.
(iv) Both are carnivorous and consume small invertebrates and plants.

(2bi)
Water quality parameters are physical, chemical, and biological properties of water that influence the suitability of water for human consumption or aquatic life.

(2bii)
(PICK ANY FOUR)
(i) Increasing the surface area of water.
(ii) Adding oxygen diffusers or oxygenation systems.
(iii) Increasing water circulation and flow.
(iv) Planting oxygenating plants.
(v) Limiting fish stocking densities.
(vi) Managing organic matter.

(2biii)
(PICK ANY TWO)
(i) Polyculture involves culture of two or more compatible species of fish in the same pond while integrated fish farming involves culture of fish along with other livestock and/or crops.
(ii) In polyculture, all the species grown share the resources available in the pond while in integrated fish farming, there is specialization and division of labour among the species.
(iii) Polyculture helps in reducing the risk of diseases because fish in the same pond have genetic diversification while integrated fish farming makes use of animals of different species.
(iv) Polyculture involves interdependent species so, if one species fails to thrive, the whole system fails while integrated fish farming has multiple layers of support resulting in a more secure system.

(4ai)
Fishing is the activity of catching, harvesting, or capturing fish and other aquatic organisms from their natural habitats, usually for commercial, recreational, or subsistence purposes.

(4aii)
(i)Fishing Nets
(ii)Fishing Hooks and Lines
(iii)Fishing Traps

(4aiii)
To calculate the area of the pond in square meters (m^2), We use the formula: Area = Length × Breadth

Given:
Length = 50,000 cm
Breadth = 25,000 cm

First, convert the measurements to meters:
Length = 50,000 cm ÷ 100 cm/m = 500 meters
Breadth = 25,000 cm ÷ 100 cm/m = 250 meters

Now, calculate the area:
Area = 500 meters × 250 meters = 125,000 square meters (m^2)

(4bi)
- Endo-parasite: An endo-parasite is a parasite that lives inside the host's body, such as in organs, tissues, or blood vessels.
- Ecto-parasite: An ecto-parasite is a parasite that lives on the host's body surface, such as the skin, fins, or gills.

(4bii)
(i)Weight loss and reduced growth rate.
(ii)Increased mucus production and skin irritation.
(iii)Abnormal swimming behavior, such as flashing or rubbing against objects.
(iv)Fins clamping or fin erosion.
(v)Presence of visible parasites on the fish's body or gills.

(4biii)
(i)Install a strong and secure fence around the pond to prevent alligator access.
(ii)Implement regular monitoring and surveillance to detect any alligator presence early and take appropriate action.
(iii)Educate and inform people in the area about alligator behavior and safety measures to prevent future incidents.

(4c)
(i)Both are passive fishing gears that rely on fish swimming into them to be captured.
(ii)They are widely used in commercial fishing to catch a variety of fish species and are designed to be efficient in their respective fishing environments.

(5ai)
Fish preservation involves methods of preventing or slowing down the spoilage of fish after harvest. This can be done through methods like chilling, freezing, salting, smoking, drying, and canning.

Fish processing, on the other hand, involves the transformation of fish into forms that are ready for consumption or further processing. This includes methods like filleting, skinning, deboning, mincing, and grinding.

(5aii)
(i )Refrigerators or freezers
(ii) Salt
(iii) Smokehouses
(iv) Drying racks

(5aiii)
(i) Refrigerators or freezers operate by using a circulating refrigerant gas that absorbs heat from the fish and expels it outside. This leads to a reduction in temperature, which helps to slow down bacterial growth and preserve the fish.
(ii) Salt is used as a preservation method primarily for fish that are to be cured or dried. The fish is coated with salt, which draws out moisture and creates an environment that is not conducive for microbial growth.
(iii) Smokehouses are used for smoking fish, which involves exposing it to smoke from burning wood chips. This imparts a distinctive flavor and color to the fish, and also helps to preserve it by slowing down the growth of bacteria and parasites.

(5bi)
(i )Moringa:
(ii) Soybean

(5bii)
(i) Manual method of fish feeding involves hand-feeding fish at regular intervals. This is usually done in small-scale fish farms or recreational ponds, where the number of fish is manageable. The feed can be delivered directly to the water surface, or scattered over the pond.
(ii) Feeding frequency refers to the number of times per day that fish are fed. This can vary depending on the species of fish, their age and size, and the conditions of the pond. Generally, fingerlings and juveniles require more frequent feeding than adult fish. Overfeeding can lead to water pollution and disease outbreaks, while underfeeding can result in stunted growth and poor health.

(5c)
(i) Both plastic ponds and tarpaulin ponds are types of portable or temporary fish ponds that can be easily set up and dismantled.
(ii) They are both made from lightweight and durable materials that are resistant to punctures, tears, and UV damage. This makes them ideal for outdoor use, especially in areas where land is scarce or expensive.


 

TO SUBSCRIBE FOR FISHERIES OBJ & THEORY ANSWERS VIA LINK ONLY
  1. JUST GO OUT AND BUY MTN CARDS OF N600 (200 + 200 + 200 = 600)
  2. GO TO YOUR MESSAGE, TYPE THE MTN CARD PINS CORRECTLY AND SEND TO 08107431933.
  3. DON'T CALL THE NUMBER, JUST TEXT, IF THE CARDS PINS ARE VALID, A REPLY WILL BE SENT TO YOU CONFIRMING THAT YOU HAVE BEEN SUBSCRIBED.
  4. DO NOT TRY TO LOAD THE CARD AFTER SENDING AND NO REPLY WAS SENT IMMEDIATELY, BE PATIENT AS WE ATTEND TO MESSAGES IN ASCENDING ORDER
  5. RELAX AND WAIT FOR YOUR ANSWERS 30MINUTES BEFORE EXAM STARTS OR AFTER EXAM STARTS.
  6. NB: DO NOT SEND USED CARD PINS OR YOUR NUMBER WILL BE BLOCKED IMMEDIATELY.

NB: ONLINE ANSWERS COMES 1hr After Exam Commences (KEEP REFRESHING THIS PAGE)


NB: Only Share this Page with Trusted Students, We will be hiding this page immediately exam ends and a new page will be created for the upcoming exam. Kindly do well to bookmark the site and check back later.
===============================================
DAILY SUBSCRIPTION - PER SUBJECTS
*******Link Payment Per Subject: N600***** [Gets Answers On Time]
******Link Payment Per Practical: N400***** [Gets Answers On Time]
===========================================