PREPUBERTAL PLASMA LH CONCENTRATION, OVULATION RATE AND PROLIFICACY IN FINN, SUFFOLK AND FINN-SUFFOLK EWES
نویسندگان
چکیده
منابع مشابه
Effects of seasonal changes on the ovulation rate and embryo quality in superovulated Black Suffolk ewes.
OBJECTIVE The objective of this study was to investigate the effects of seasonal changes on the superovulation in Black Suffolk ewes, particularly the ovulation rate and embryo quality. DESIGN Black Suffolk ewes were superovulated either in May (n=22) or in September (n=21), 2013. After estrus synchronization with CIDR, the donor ewes were superovulated with PMSG and seven decreasing doses of...
متن کاملPlasma LH concentrations for prepubertal, postpubertal, anestrous and cyclic ewes of varying fecundity.
Luteinizing hormone (LH) was measured in plasma samples collected at 15-rain intervals for 2 hr from 40 prepubertal Finn, Finn-cross (1/2), Rambouil let and Hampshire ewes at 9, 13 and 17 weeks of age and on Day 5 of the second estrous cycle after puberty. Blood samples were collected at 20-min intervals from 40 yearling and 20 mature ewes of the same breeds during anestrus and on Day 5 of the ...
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Mature Suffolk ewes were either actively or passively immunized against the synthetic fragment of porcine inhibin alpha, pI alpha(1-30), to determine the effects on gonadotrophin secretion and ovulation rate. Thirteen control ewes were immunized against human serum albumin, 12 ewes were actively immunized against pI alpha(1-30) and 36 ewes were passively immunized with pI alpha(1-30) antiserum....
متن کاملReproductive performance of Suffolk and Suffolk-cross ewes and ewe lambs exposed to vasectomized rams before breeding.
Multiparous Suffolk and Suffolk-cross ewes were randomly allotted to treatments within breed and year to measure effects of ram exposure, during transition from anestrus to breeding activity, on reproductive performance. Treatments were: 1) ewes joined with two mature vasectomized Rambouillet rams for 15 d before breeding (DC), 2) ewes maintained across a net wire fence from two vasectomized ra...
متن کاملEffect of subacute dietary nitrate on production traits and plasma analytes in Suffolk ewes.
Elevated dietary nitrate (NO3-) is associated with production losses in ruminant livestock, resulting in substantial economic losses incurred by producers. Severe drought, fertilization practices and poorly maintained pastures increase the risk of elevated NO3- intake among cattle and sheep. Nitrate is metabolized to nitrite (NO2-) in the rumen and further reduced to ammonia. Ruminants consumin...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1984
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas84-009