[Animal feed additives, veterinary drugs and the environment].

The use of feed additives and veterinary drugs is an established feature in current animal production practices. Having been administered to the animals, these compounds are excreted virtually in toto in the faeces and urine, thus reaching the environment (soil, surface water) in their initial form and/or in the form of metabolites. In the present paper, the extent of environmental pollution by residues of feed additives and animal drugs, the resulting problems and the requirements of the authorities as regards the collection of information on the environmental impact of this type of compounds, are briefly reviewed.

Comparison of the thermoregulatory responses to intracerebroventricularly injected dopamine and noradrenaline in the sheep.

The thermoregulatory effects of dopamine (DA), given by intracerebroventricular (i.c.v.

Comparison of the thermoregulatory responses to intracerebroventricularly injected dopamine, noradrenaline and 5-hydroxytryptamine in the goat.

The thermoregulatory responses to dopamine (DA), noradrenaline (NA) and 5-hydroxytryptamine (5-HT), injected into the third cerebral ventricle of goats at 20 degrees C ambient temperature (Ta) or during cold exposure, were compared before and after pretreatment with the DA receptor blocker haloperidol or the 5-HT receptor blocker methysergide. At 20 degrees C Ta, intracerebroventricular (i.c.

Thermoregulatory effects of intraventricularly injected dopamine in the goat.

Dopamine (DA) was injected in the third brain ventricle of goats and the thermoregulatory effects were studied under different ambient conditions. The effects depended on dose, ambient conditions and cannula used. In the cold, there was a drop in body temperature, sometimes accompanied by suppression of shivering and by vasodilatation.