Useful life of breeding flock ram should not surpass 4 years according to inbreeding increment.

从近交系数增量考虑，育种群公羊使用年限最多不应超过4年。

youdao

When ram use one year, ewe use 2 years in breeding flock, and ewe uses 5 years in production flock will acquire ideal breeding efficiency.

在育种 群公羊使用1年，母羊使用2年，生产 群母羊使用5年时，可获得理想的育种效率。

youdao

Under new feeding method of Apis cerana cerana seasonal management, the skill of breeding right age overwintering bee flock and the cutting off offspring by imprisonment should be undertaken.

在新法饲养中蜂季节性管理中，必须采取培育适龄越冬蜂并适时幽王断于的技术措施。

youdao

The nightmare prospect is that Turkey's farmers, about 45% of the nation, with no more state subsidies to keep them afloat, will flock to the cities, whose swollen shanty-towns are already a fertile breeding-ground for extremists, be they Islamists, Kurds or others.

ECONOMIST: Fresh IMF money may save the economy, at a high social cost

We are talking about breeding starlings here rather than wintering starlings, many of which are migrants from the North and East and still flock to the South West in huge numbers: as attested to by the spectacular roosts of a million birds or more on the Somerset Levels.

BBC: Bristol - In your garden: which birds rule?