Waec Fisheries 2019

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.
Fishery: A place where fish are reared for commercial purposes
Area of the pond, A = 2(lb + ld + bd)
A = 2(20×10 + 20×1.5 + 10×1.5)
A = 2(200 + 30 + 15)
A = 2(245)
A = 490 m²
Volume of the pond, V = l×b×h
V = 20×10×1.5

V = 300m³

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
(i)Many water resources can potentially be used, including ponds, lakes, strip pits, rivers, and streams.
(ii)Cage culture requires a relatively small financial investment.
(iii)Feeding, sampling, observation, and harvesting are all comparatively simple.
(i)The fish are crowded in cages, and there is a relatively high incidence of disease that can spread rapidly.
(ii)There can be localized poor water quality, such as low dissolved oxygen, in and around cages.
(iii)Caged fish do not have access to natural food, so a nutritionally complete diet is required.
(i)lack of clean water
(ii)Poor nutrition
(iii)dirty environment
(iv)lack of treatment
(ii)line and sinker.
(iii)Fishing rods
(iv)Fishing reels.

Area of the pond, A = 2(lb + ld + bd)
A = 2(20×10 + 20×1.5 + 10×1.5)
A = 2(200 + 30 + 15)
A = 2(245)
A = 490 m²
Volume of the pond, V = l×b×h
V = 20×10×1.5
V = 300m³
Number of fish is given by :
= 8 × 490
= 3,920

Site selection:
(i) Consider the topography
(ii) Consider the soil type
(i) Consider the depth of the pond
(ii) Consider the size of the pond
Stripping of topsoil:
(i) Mulching
(ii) improving of oxygen content by addition of freshwater
Dyke construction:
(i) Checkmating the proper location for construction
(ii) Considering the distance to the pond

(i)Area: Consider the climate of the area that you want to do your fish farming.
(ii)Water availability: Fish are aquatic animals and therefore require water for survival.
(iii)Size: consider the size of the site you want to establish the fish pond
Induced breeding process by means of which the extract of the pituitary is introduced inside the body of both the matured male and female fishes, then the carps after being excited lay eggs in the pond water and subsequently fertilization takes place
(i)Collection of Pituitary Extract
(ii)Selection of Breeders
(iii)Injection of Pituitary Extract
(iv)Spawning in Breeding Hapa
(v)Precautions for Induce Breeding



Published by MAVEN4ALL

A versatile person who is interested in Education and Entertainment

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