02023naa a2200289 a 450000100080000000500110000800800410001902400430006010000200010324501570012326000090028052011920028965000140148165000170149565000100151265000120152265000130153465000220154765000170156965000170158665300090160365300150161270000180162770000150164570000180166077300550167820146372016-03-29       2015    bl uuuu     u00u1 u    #d7 a10.1016/j.smallrumres.2015.02.0132DOI1 aNOGUEIRA, D. M.  aThe timing of the commencement of the breeding season in Boer and rangeland goats raised in the tropics of Queensland, Australia.h[electronic resource]  c2015  aThis study aimed to determine the timing of the onset of the breeding season in Boer and rangeland goats raised in a tropical region of northern Queensland. The experiment wascarried out using 25 Boer and 20 rangeland female goats. Boer and rangeland goats were kept on the same pasture in the absence of males and supplemented to provide nutritional requirements above maintenance. Blood samples were collected once weekly from December 2011 to May 2012 and analyzed for concentrations of progesterone. The mean time to first ovulation was found to occur earlier in Boer compared to rangeland goats (64.7 ± 5.0 days vs. 87.7 ± 5.6 days, respectively; P &lt 0.05). Differences in survival curves (P &lt 0.05) for the timing of onset of first ovulation between breeds were also detected. Boer goats started ovulating in December (8.3%) and had all ovulated by March while most rangeland goats started ovulating in March (84%) and had all ovulated by the end of April. These results demonstrate that in a tropical region of north Queensland Boer goats commence ovulatory cycles earlier than rangeland goats which may be beneficial if an earlier start to the breeding season is preferred.  aAustralia  aProgesterone  aCabra  aCaprino  aPastagem  aProdução animal  aProgesterona  aReprodução  aGoat  aRaça Boer1 aCAVALIERI, J.1 aGUMMOW, B.1 aPARKER, A. J.  tSmall Ruminant Researchgv. 125, p. 101-105, 2015.