whose 215 in monitored performance recording
Prolificacy : 2.95
Average weight at 30 days of a male lamb, born a twin : 9,5 kg
Average weight of rams : 85 kg
Average weight of ewes : 60 to 70 kg
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Origins and natural aptitudes
The Finn or Finnsheep is one of the most prolific breeds in the world : it’s rate of prolificacy is on average 280%, some bloodlines reaching 300%. It’s a breed where the females, naturally fertile all year round, can lamb from one year of age upwards. It is a white sheep, lacking distinctive physical features which might deter crossbreeding, but passing on its purebred strengths to the F1 progeny.
Large scale crossbreeding : The organisation of the crossbreeding of the FINN breed has much in common with the ROMANOV. The females of these two breeds are served by a ram from a meat breed and the progeny are all fattened for the meat trade. This technique means that lambs of a reasonable conformation can be produced whilst retaining a profitable level of productivity. The resulting meat weight produced per ewe per year is high.
Crossbreeding in two stages: The first stage is to produce a crossbred female with better conformation than the purebred Finn (or ROMANOV) and more prolific than the local breed. This half breed female F1 can be obtained :
- either by crossing the FINN (or ROMANOV) ewe with a local breed of ram ; this way the « F1 » can be produced quicker.
- or from the male FINN (or ROMANOV) with a ewe of a local breed.
At the second stage, the « F1 » females produced, are put to a ram of a meat breed with the aim of producing fat lambs « F2 » for the meat trade. The carcass weight of « F2 » lambs is generally between 17 and 19 kg, graded U and R on the EUROP grid table. This two staged cross breeding is the system used most widely with prolific breeds.