Corporate Fish Farm Nigeria

What are the factors to watch out for to identify a female brood-stock ready for spawning with a tendency to produce impressive result? 
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What are the factors to watch out for to identify a male brood stock with matured and big sperm sack? 
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If the male sperm is somehow watery but slightly milky (i.e. not very milky) can it still fertilize the female eggs? 
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What volume of Ovaprim per kg of fish should be used to inject the female fish? 
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Where is the best position to inject the female fish to induce it to release it’s eggs? 
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How long should one wait after injecting the female fish before stripping it of it’s eggs? 
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How does one kill the male fish to remove its’ sperm sacks and mix the sperm with the female eggs? 
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How many sperm sacks should one use to fertilize the eggs of a female fish? 
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How long does the fertilization process take? i.e. the number of hours to wait before checking the pond to know whether the male sperm has fertilized the female eggs into fries. 
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Can hatcheries be located outside in the open air? Most farmers seem to locate their hatcheries inside a room. 
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