01322naa a2200253 a 450000100080000000500110000800800410001902400560006010000190011624501690013526000090030452005210031365000180083465000170085265000100086965000170087965000150089665000110091165000100092265000170093265300190094970000170096877300830098515300812023-11-16       1976    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1080/03015521.1976.104258822DOI1 aALLISON, A. J.  aStudies of mating behaviour and fertility of Merino ewes. II. Effects of age of ewe, live weight, and paddock size on duration of oestrous and ram-seeking activity.  c1976  aAbstract: The mean duration of oestrus in two-tooth and mixed-age Merino ewes was 10.8 and 12.8 hours respectively (not significant, range 2?24 hours). Live weight of ewes also had no significant effect on the duration of oestrus. Ram-seeking activity was higher in mixed-age ewes than in two-tooths (P &lt 0.01) and was also increased in groups with a higher mean live weight (P &lt 0.01). An increase in paddock size reduced the percentage of ewes in both age-groups which were mated by tethered rams (P &lt 0.01).  aEstrous cycle  aReproduction  aSheep  aCiclo Estral  aFisiologia  aMerino  aOvino  aReprodução  aOestrous cycle1 aDAVIS, G. H.  tNew Zealand Journal of Experimental Agriculturegv. 4, n. 3, p. 269-274, 1976.