M. Roozen

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We have tested the effect of noradrenaline depletion by clonidine in agonistic behavior of intact male and gonadectomized testosterone-treated female rats. Animals were subjected to the 'resident-intruder' paradigm: in 4 consecutive daily confrontations residents defeated intruders. Clonidine-treated intruder males showed higher levels of aggression than(More)
OBJECTIVES The purpose of this study was to investigate the efficacy of tylvalosin (Aivlosin Water Soluble Granules, ECO Animal Health) in drinking water for control of Mycoplasma hyopneumoniae (M hyo) on a farm with chronic enzootic pneumonia (EP) problems and high prevalence of mycoplasma-like lesions at slaughter. DESIGN On a 4000-sow farm in the(More)
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