02022naa a2200325 a 450000100080000000500110000800800410001910000190006024500930007926000090017252011350018165000090131665000150132565000290134065000190136965000160138865000160140465000150142065000100143565000100144565000170145565300180147265300220149065300160151270000160152870000190154470000180156370000200158177300950160115226502023-03-31       1986    bl uuuu     u00u1 u    #d1 aJAGUSCH, K. T.  aThe cause of reproductive loss in Gisborne-East coast ewe flocks.h[electronic resource]  c1986  aLow lambin g rate s are characteristi c of ewe flocks on th e summer-dr y Eas t Coast . In th e presen t experiment , group s of 4-an d 6-toot h 54 kg ewe s wer e eithe r kep t on, or transferre d between , non-facia l eczema-pron e (NFE ) an d facial eczema-pron e (FE ) stations . Two additiona l group s on th e FE statio n receive d weekl y dose s of zin c an d sena l blood samplin g of all group s identifie d ewe s wit h a hig h threshol d resistanc e to FE . Ewe s gaine d 4 kg in the 8 week s prio r to mating . Group s on th e NF E statio n ha d 3% barrennes s an d 55% twinning ; thos e on th e FE statio n ha d Il%an d 38%. Resistanc e to FE reduce d barrennes s from 18 to IO%butdi d not increas e twinning . Estimate d lambingpercentage s were 150 on th e NF E station , 113 on th e FE . Th e FE facto r wa s associate d wit h som e of th e barrennes s bu t most of the reproductiv e loss appeare d du e to a facto r whic h imitate d an oestrogen . Th e oestrogeni c mycotox m zearalenone, produce d by som e pastur e Fusaria , wa s detecte d in pastur e samplescollecte d from the FE bu t not from th e NFE station.  aEwes  aMycotoxins  aReproductive performance  aSheep diseases  aZearalenone  aFertilidade  aNutrição  aOvino  aPerda  aReprodução  aFacial eczema  aReproductive loss  aSporidesmin1 aGRAY, M. H.1 aMACLEAN, K. S.1 aTOWERS, N. R.1 aDI MENNA, M. E.  tProceedings of the New Zealand Society of Animal Productiongv. 46, p. 251-253, Jan. 1986.