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NADIS Knowledge Transfer - Seasonal Infertility

Please select one or more answers from the list for each question. Many have multiple answers - these will only be marked as correct when all the right answers and none of the wrong answers, have been selected

Which of the following statements is true?

	Pig breeding shows no seasonal patterns.
	Pigs are at their maximum fertility in autumn.
	Hot weather improves fertility.
	Hot weather compromises fertility.
	None of these

With respect to autumn fertility:

	It is manifest by increase in return to service.
	It is manifest by delayed oestrous onset.
	Affects old sows worse than young ones.
	Is affected by decreasing day length.
	All of these

Seasonal infertility:

	Is an insignificant cost to a unit
	Can reduce farrowings by 20% or more.
	Can lead to uneven farrowing patterns.
	Does not affect litter size.
	None of these.

The effects of hot weather infertility can be mitigated by:

	Increasing bedding provision
	Increasing service numbers
	Leaving lights on permanently
	Ensuring plenty of water is available
	All of these

Autumn infertility can be offset by:

	Decreasing light levels.
	Providing 14-16 hours daylength with artificial light from early August.
	Increasing feed levels for served sows.
	Increasing boar contact.
	Decreasing service numbers.

Long term consequences of seasonal infertility can be:

	Erratic farrowing patterns.
	Reduced and uneven sales.
	Retention of sows that would otherwise be culled.
	Uneven use of boars
	All of these

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