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NECO 2024 Fisheries Theory and Objectives Answers
NECO FISHERIES
NUMBER ONE
(1a)
(i) Reduced availability of dissolved oxygen due to the dense growth of aquatic weeds, which can lead to suffocation and mortality of fingerlings.
(ii) Interference with the movement and feeding of fingerlings, as the weeds can create a physical barrier and obstruct their access to food.
(iii) Provision of hiding places for predators, which can increase the risk of predation on the fingerlings.
(iv) Accumulation of waste and decomposing organic matter, which can lead to the buildup of toxic substances and deterioration of water quality, affecting the overall health and growth of the fingerlings.
(1bi)
Spillway: A spillway is a structure designed to safely pass excess water from a dam, reservoir, or other water-retaining structure. It helps to prevent the overtopping and potential failure of the structure during high-flow events.
(1bii)
Fish sampling: Fish sampling is the process of collecting a representative sample of fish from a water body to assess the population characteristics, such as species composition, size distribution, and abundance. This information is crucial for fisheries management and monitoring.
(1biii)
Cropping: In aquaculture, cropping refers to the harvesting of fish or other aquatic organisms from a culture system. It involves the selective removal of individuals based on their size, age, or market demand, ensuring the efficient utilization of the available resources and maintaining the productivity of the system.
(1biv)
Feeding regime: The feeding regime in aquaculture refers to the pattern and frequency of feeding the cultured organisms. It involves the determination of the appropriate amount, timing, and composition of the feed to meet the nutritional requirements of the species and optimize their growth and health.
(1ci)
[In a Tabular Form]
-Intensive culture system-
(PICK ANY TWO)
(i) High stocking density
(ii) Reliance on artificial feeding
(iii) Controlled environmental conditions
(iv) Higher capital and operational costs
(v) Increased risk of disease outbreaks
(vi) Higher productivity per unit area
-Extensive culture system-
(PICK ANY TWO)
(i) Low stocking density
(ii) Reliance on natural food sources
(iii) Less control over environmental factors
(iv) Lower capital and operational costs
(v) Lower risk of disease outbreaks
(vi) Lower productivity per unit area
(1cii)
(PICK ANY FOUR)
(i) Provision of a reliable source of animal protein
(ii) Generation of employment opportunities
(iii) Diversification of the agricultural sector
(iv) Contribution to food security and poverty alleviation
(v) Potential for export and foreign exchange earnings
(vi) Promotion of sustainable utilization of aquatic resources
NECO 2024 Fisheries Questions Papers:
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