Waec 2019 Fishery Obj & Essay Answer Now Available.

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1b)i) Area = Length X Breadth
=10 x 20
=200m²

ii) Volume= length X breadth x depth
=10 x 20 x 1.5
=300m³

iii) Stocking rate is 8fish/m²
8fish= 1m²
x fish = 200m²

x= 200 x 8
x= 1600fishes

1c i)

Cast net : A cast net , also called a throw net , is a net used for
fishing . It is a circular net with small weights distributed around its edge.

The net is cast or thrown by hand in such a manner that it spreads out on the water and sinks. This
technique is called net casting or net throwing. Fish are caught as the net is hauled back in. This simple device is particularly effective for catching small bait or forage fish

1cii)

Hook and line: Hooks and lines are gear where the fish is attracted by a natural or artificial bait (lures) placed on a hook fixed to the end of a line or snood, on which they get caught.

2a)
i)do not transport brood stock in bad water
ii)do not rough handle brood sock
iii)disinfect brood stock before allowing them into your hatchery,or brood stock pond
iv)do not transport brood stock 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 hotnesss of water and reduce water oxygen

2cii)
high turbidity reduces the intensity of light
Getting into the fish pond

2ciii)
low dissolve oxygen causes many difects 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

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