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NECO 2019 FISHERY OBJECTIVE AND ESSAY QUESTIONS AND ANSWERS
(1a)
(i)Water quality management
(ii)Bioenergy aquaculture
(iii)Fish feeds(grass crap)
(iv)Pond fertilization
(1bi)
Algal bloom; is a rapid increase in the population of algae in an aquatic system. In other words algal blooms may occur in freshwater as well as marine environments
(1bii)
Test cropping; is a technique which is designed to check whether the crops meet their specific requirements. In other words is the removal of marketable sized fish from the pond
(1biii)
Aquarium; is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquatic reptiles such as turtles, and aquatic plants.
(1c)
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(3ai)
Carnivores: A carnivore, meaning “meat eater”, is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging.
(3ii)
Herbivores: A herbivore is an animal that gets its energy from eating plants, and only plants. Omnivores can also eat parts of plants, but generally only the fruits and vegetables produced by fruit-bearing plants. Many herbivores have special digestive systems that let them digest all kinds of plants, including grasses.
(3aiii)
Grazers: A grazer is an animal, usually a herbivorous mammal, which eats grass. It is contrasted with browsers, which eat trees & shrubs.
(3b)
(i)Vitamins
(ii)Minerals
(iii)Protein
(iv)Carbohydrates
(v)Fats
(3ci)
Coming…
(3cii)
(i)Hardiness: The fish must be hardy, must be able to withstand handling conditions/adaptive.
(ii)High survival rate: large number/percentage must survive in captivity
(iii)Compatibility: The fish must be able to co-exist with other fish species i.e. polyculture
(vi)Acceptance of artificial feed: The fish must be able to accept man made or compounded feed
(v)Acceptability to consumers/marketability: The fish must be marketable and accepted by the target consumers
(3ciii)
Mariculture is a specialized branch of aquaculture involving the cultivation of marine organisms for food and other products in the open ocean, an enclosed section of the ocean, or in tanks, ponds or raceways which are filled with seawater.
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