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EFFECTS OF BODYWEIGHT AND PMS ADMINISTRATION ON REPRODUCTION RATE IN MERINO EWES
Author(s) -
Hedges D. A.,
Reardon T. F.
Publication year - 1975
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1975.tb09412.x
Subject(s) - reproduction , zoology , biology , ecology
Data are presented on the effects of the use of pregnant mare serum gonadotrophin (PMS) and of increased liverweight on the number of lambs born, or in utero, in mature fine-woolled Merino ewes. The primary effect of increased bodyweight was to reduce the number of barren ewes whereas the main effect of PMS treatment was to increase the level of twinning among those ewes which conceived. The 2 effects appeared to be additive but it is pointed out that the survival rate of the lambs will be an important consideration in assessing the relative merits of the 2 treatments.