Intensive visual monitoring during the 2016 lambing period (5 to 7 times/wk during May-June) led us to estimate a lambing rate
of 25:100 lamb-to-ewe ratio (5 lambs of 20 adult ewes).
Effects of active immunization against a synthetic peptide sequence of the inhibin a-subunit on plasma gonadotrophin concentrations, ovulation rate and lambing rate
The lambing rate
is not as high as other hair breeds.
While our average lambing rate
is well above two, our weaning rate is slightly below two.
(2011) recorded that GnRH administration is effective for increase of ovulation rate and consequently lambing rate
, where lambing rate
in GnRH group (162.5%) was higher compared to control group (125%).
The twining and lambing rate
were 4.30 and 85 percent, respectively, whereas secondary sex ratio (male: female) was observed to be 49.37:50.63.
Senior analyst Paul Heyhoe said: "It has been clear for some time that the lambing rate
would be lower, as the poor weather in 2012 and associated feed problems will have resulted in many ewes being in poor condition at tupping."
TABLA I FRECUENCIAS ABSOLUTAS Y PORCENTAJE DE PARTOS POR EPOCAS CLIMATICAS EN OVEJAS DE RAZAS DE PELO/ ABSOLUTES FREQUENCY AND LAMBING RATE
BY CLIMATIC SEASON IN EWES OF HAIR BREED.
: usually twins (frequently triplets), can lamb twice a year
Flushing is the practice of increasing the nutrient intake (primarily energy but also protein) around the time of breeding to improve ovulation rate and, hence, the lambing rate
. Lambing rate
would be 100 percent if each ewe in the flock gives birth to a single lamb; it would be 200 percent if each ewe has twins.
However, the breeding rate of Bayanbulak sheep is 91.5% to 103%, and their twin lambing rate
is 2% to 3%.
THE rise in lamb numbers this year is a "clear indication" that the Welsh flock had recorded a better lambing rate
this season than in previous years, according to Hybu Cig Cymru.