01094naa a2200289 a 450000100080000000500110000800800410001910000140006024500980007426000090017252003020018165000090048365000120049265000140050465000250051865000170054365000100056065000160057065000100058665000100059665000170060665300300062365300190065370000190067270000200069177300930071115219122023-05-08       1978    bl uuuu     u00u1 u    #d1 aVAVRA, M.  aThe influence of age at first lambing on ewe production and longevity.h[electronic resource]  c1978  aThe objectives of this study were: (1) To determine whether lambing at one year of age decreased production at two years of age. (2) To determine how lambing at one year of age influenced lifelong production. (3) To determine if length of productive life was decreased by lambing at a year of age.  aEwes  aLambing  aLongevity  aParturition interval  aReproduction  aSheep  aLongevidade  aOvino  aParto  aReprodução  aComportamento reprodutivo  aPrimeiro parto1 aHOHENBOKEN, W.1 aPHILLIPS, R. L.  tCOrvallis: Oregon Agricultural Experiment Station, 1978. p. 1-11. (Special Report, 502).