*Verified Fisheries Obj*
1-10: BDABADDCDA
11-20: DAACBADACA
21-30: DCCCBBCCAA
31-40: DDCCCADBDC
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*2019 WAEC FISHERY ESSAY SOLUTION*
Ia)
(i) Fisheries: The science of producing fish and other aquatic resources for the purpose of providing human food, although other aims are possible (such as sport or recreational fishing), or obtaining ornamental fish or fish products such as fish oil.
(ii) Fishery: A place where fish are reared for commercial purposes......
1b)i) Area = Length X Breadth
=10 x 20
=200m²
ii) Volume= length X breadth x depth
=10 x 20 x 1.5
=300m³
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
2d)
Rope
Floats
Cork
Plastics
3aii)
Pumps
Aeration devices
Seine Reels
Handling and Grading Equipment.....
4bi)
The
feeding regime is defined primarily by the composition of the basic ration, then by feed supplements and concentrates.
5ai)
Agricultural limestone (calcium carbonate or dolomite)
hydrated lime (calcium hydroxide)
quick lime (calcium hydroxide)
5aii)
It is poisonous to various organisms in the sea, such as fish and clams
if they enter the food chain, they may also be ingested by humans which can also be poisonous
(5ai)
(i) quicklime
(ii) hydrated lime
(iii) limestone
(5aii)
(i) Harmful to fishes
(ii) It reduces rate of fish reproduction
(iii) It can be harmful to man when eaten the affected fish
(iv) It causes water pollution
(5aiii)
(i) Water
(ii) Temperature
(iii) pH
(5aiv)
A fishpond is a controlled pond, artificial lake, or reservoir that is stocked with fish and is used in aquaculture for fish farming, or is used for recreational fishing or for ornamental purposes. It may contain shallow water with marsh and aquatic plants and animals.
6a)
Zooplankton are a type of heterotrophic plankton that range from microscopic organisms to large species, such as jellyfish. Zooplankton are found within large bodies of water, including oceans and freshwater systems.
They are small floating or weakly swimming organisms that drift with water currents and, with phytoplankton, make up the planktonic food supply upon which almost all oceanic organisms are ultimately dependent .....
6b)
annelids
molluscs
worms
phytoplankton.......
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