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| Explain why differences in prolificacy are due largely to environmental effects rather than heredity. Give three good examples. |
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| What nutrients would you expect to be highly concentrated in the composition of the sperm, semen, ova, accessory fluids, and embryonic tissues? When might these nutrients be especially critical in the diet of breeding animals? |
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| Relate the effects of overfeeding and underfeeding of breeding animals to their age at puberty, skeletal size, conception rates, and possible dystocia. |
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| What is the purpose of increased nutrient allowance prior to and during the time of breeding in some species? Explain |
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| How might such factors as heat stress and hormone containing feeds affect the performance of breeding animals? |
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| At what stage of pregnancy does nutrient demand rapidly increase? |
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| What is the relationship between uniformity of pullet flock body weight and potential egg production? |
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