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FISHERIES OBJ:
1-10: ACDDCBBCDC
11-20: DCCAAAABBA
21-30: ACABBCCBCC
31-40: ABABDCABDB

(2ai)
Integrated fish farming is a system of producing fish in combination with other agricultural/livestock farming operations centered around the fish pond.

(2aii)
(i)Fish with pig
(ii)Fish with sugarcane
(iii)Fish with vegetables
(iv)Fish with snail

(2bi)
(i)selling fish to the processing industry,
(ii)grading of fish
(iii)processing fish themselves,
(iv)selling to the world

(2bii)
(i)jute bags
(ii)mat bags
(iii)cartons

(2ci)
(i)Prepare the site.
(ii)PEG OUT THE POND AREA.
(iii)CONSTRUCT CLAY CORES.
(iv)EXCAVATE THE POND AND CONSTRUCT DYKES.
(v)INSTALL DRAINAGE SYSTEM.

(2cii)
(i)Spade
(ii)Digger

(4a)
Stocking rate of a fish pond is the process of introducing selected, culturable, compatible, and fast-growing fish seed into ponds for growing.

(4b)
(i) Total removal of the polluted water.
(ii) Cleaning of the pond
(iii) Growing of water plants
(iv) Control algae growth.
(v) Repair of leaks.

(4ci)
It shows that there is deficiency of oxygen and pollution of the water body due to algae bloom

(4cii)
(i) Increase in nutrient in the body of the water
(ii) Algae outgrowth
(iii) Oxygen deficiency
(iv) Low light penetration

(4ciii)
(i) It may lead to death
(ii) It may lead to congenital disease of the Clarias spp
(iii) It leads restlessness of the fish due to oxygen deficiency
(iv) It can cause loss of weight

(1a)
(i)plastic bags or 5-gallon buckets with water from the tank to transport your broodstock.
(ii)Make sure the bag/bucket has enough air for your brood stock
(iii)Take any plants from the tank and place them in bags with water from the tank to keep good bacteria on them alive.
(iv)Try to save 80% of the water from your tank

(1b)
(i)to help reduce the level of shock
(ii)To help curtail harsh weather conditions
(iii)To reduce death rate and maximize survival

(1c)
(i)fertilization
(ii)Incubation
(iii)hatching of eggs
(iv)Overprim

(1d)
(i)Eradication of predatory animals
(ii)Eradication of insect
(iii)Eradication of aquatic weeds
(iv)Assessment of food in nursery

(1e)
(i)water level
(ii)Level of rainfall
(iii)Water temperature
(iv)Turbidity
(v)Ph level of the water

(6a)
(i)Hatcheries can provide food sources to carnivorous fish, enabling their continued supply.
(ii)Hatcheries allow for the replenishment of fish in sea waters.
(iii)The process of running fish hatcheries is very labor-intensive.
(iv) Hatcheries protect aquatic species from disappearing from ecosystems.

(6b)
(i)Raceways offer a much greater ability to observe the fish.
(ii)Raceways can be easily built in series.
(iii)It is Less labour intensive to cleaning and feeding.
(iv)It allows Easy monitoring of fish.

(6ci)
Hatching trough: They are used for the hatching of channel catfish eggs and help in eggs adhering to nest material or adhering in a mass to each other.

(6cii)
Happa: they are use for generating fingerlings and also The mesh size is such that the fry or fish inside can not escape.

(6ciii)
Syringe: It is use to deflate the swim bladder from a fish that’s been brought quickly out of deep water and can’t swim back down.

(6civ)
Microscope: It is use to examine scrapes from the fish skin

(6cv)
Aquarium tank: It is use to allow the fish culturist to easily manage stocks and to exert

(6d)
(i)Prawn shell waste
(ii)Groundnut oil cake
(iii)Wheat bran

(6e)
(i)phosphorus
(ii)Nitrogen
(iii)Carbonaceou Biochemical Oxygen Demand
(iv)Die-off and decomposition

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See The Previous WAEC Fisheries Answers below
FISHERIES OBJ:
1-10: ADDBACBADA
11-20: BDACBADDAC
21-31: ADDAACCBDC

(2a)
(i)do not transport broodstock in bad water
(ii)do not rough handle brood sock
(iii)disinfect brood stock before allowing them into your hatchery, or broodstock pond
(iv)do not transport broodstock in a crowded condition

(2b)
(i)digging out pit
(ii)constructing manual barriers
(iii)disinfecting the water
(iv)getting water supply
(v)cult
(vi)trenching the pond

(2ci)
high temperature increases the hotness of water and reduces water oxygen
(2cii)
high turbidity reduces the intensity of light getting into the fish pond
(2ciii)
low dissolved oxygen causes many defects in fish which include asphyxiation, low food intake

(2d)
(i)use of hook and line
(ii)use of scoop net

(3a)
(i)Agricultural limestone
(ii)Basic slag
(iii)Laked lime
(iv) Quick lime
(v) Liquid Lime

(3bi)FISHING GEAR: Fishing gear is the equipment used by fishermen when fishing. Almost any equipment or gear used for fishing can be called fishing tackle. Some examples are hooks, lines, sinkers, floats, rods, reels, baits, lures, spears, nets, gaffs, traps, waders and tackle boxes.
(3bii)FISHING CRAFT: Fishing crafts are most essential for catching the fish in large scale in water bodies … a kind of floating raft, such as the ones used along the east coast of India

4a)
Aquaculture refers to the breeding, rearing, and harvesting of plants and animals in all types of water environments including ponds, rivers, lakes, and the ocean.

4b)
(i)The head
(ii)Scale
(iii)the fins
(iv)Literal line
(v)skin
(vi)Gills

(5a)
Cannibalism in fish is the actor practices among fishes, eating the fish or internal organs of other fishes
(5aii)
(i)by sorting
(ii)proper stocking of fishes

(5b)
(i)reducing fish losses through cannibalism;
(ii)improving supplementary feeding efficiency through adequate food ration;
(iii)increasing the accuracy of stock estimates for monitoring

(5c)
(i) ocean
(ii) river
(iii) streams
(iv) sea
(v) lake

(5di)
The latency period is the period between the exposure and i*******n of disease
(5dii)
Gravid fish are female fishes producing eggs