03465nas a2200241   4500008004100000020001400041245010500055210006900160300001200229490000800241520265400249653002002903653001502923653001502938653002702953653002002980653001503000100001903015700002203034700002203056700002003078856012503098       2003                        eng d  a0931-204800aEffects of ivermectin and doramectin faecal residues on the invertebrate colonization of cattle dung0 aEffects of ivermectin and doramectin faecal residues on the inve  a481-4880 v1273 aThe effects of avermectin [ivermectin (IVM) and doramectin (DRM)] faecal residues on dung colonization and degradation by invertebrates were evaluated during late spring in the east of La Pampa province, Argentina. The study was conducted after collection of faecal material from animals (10 steers per group) allocated to the following groups: untreated control group (CG) and groups treated subcutaneously (200 lg/kg) with either DRM (DG) or a long-acting formulation of IVM (IG). Fifty pats (550 g each) per group were collected, prepared and deposited on the field on days 3, 7, 16 and 29 post-treatment (pt). Eight pats per group were recovered after 7, 14, 21, 42, 100 and 180 days post-deposition (pd) on the field. The weight, percentage of dry matter, number of arthropods and nematodes from faeces were determined. The faecal concentrations of IVM and DRM were measured by high performance liquid chromatography (HPLC) throughout the trial period to correlate the pattern of drug degradation in dung with pd time. The total number of arthropods in dungs from CG was higher (P < 0.05) than those counted between days 3 and 29 pt in IG and DG. A decrease in the number of Coleoptera larvae (P < 0.05) between days 21 and 42 days pd was observed in both treated groups. Diptera larvae counts in CG pats were significantly higher (P < 0.05) than those obtained in treated groups in the 7- and 14-day-old pats. A lower number (P < 0.05) of Collembola, compared with pats from CG, was recovered from IG and DG pats deposited at days 3 and 7 pt and exposed from day 42. The counts of Acari in pats from treated animals were lower (P < 0.05) than those observed in CG pats at 3, 8 and 16 days pt. There were no differences neither in adult Scarabaeidae recovered nor in the proportions of dung buried and destroyed by great dung beetles. Dung specific nematodes were reduced (P < 0.05) in IG and DG pats from 3 and 7 days pt compared with those of CG pats. The comparative results shown here demonstrate that the negative effects of both IVM and DRM on dung colonization are similar. The pattern of drug degradation in the environment was very slow. High residual concentrations of both active parent compounds were recovered in dungs exposed in the field for up to 180 days pd. Concentrations as high as 13 ng/g (IVM) and 101 ng/g (DRM) were measured in faeces obtained from pats deposited on day 27 pt and exposed to the environment during 180 days. The results show a decrease in invertebrate colonization of dung recovered from IVM- and DRM-treated cattle, which is in agreement with the large drug residual concentrations measured in faeces. 10acattle-nematoda10adoramectin10adung-fauna10aenvironmental toxicity10afaecal residues10aIVERMECTIN1 aSuarez, V., H.1 aLifschitz, A., L.1 aSallovitz, J., M.1 aLanusse, C., E.  uhttps://scarabnet.myspecies.info/effects-ivermectin-and-doramectin-faecal-residues-invertebrate-colonization-cattle-dung00820nas a2200181   4500008004100000245023100041210006900272300001200341490000800353653001600361653002200377653001500399653001300414653002500427100002200452700002600474856013800500       1988                        eng d00aThe effctes of the antiparasitic drug ivermectin on the development and survival of the dung-breeding fly Orthelia cornicina (F.) and the scarabaeine dung beetles Copris hispanus L., Bubas bubalus (Oliver) and Onitis belial F.0 aeffctes of the antiparasitic drug ivermectin on the development   a381-3890 v10610adung beetle10aecosystem service10aIVERMECTIN10aparasite10atoxicity dung beetle1 aWardhaugh, K., G.1 aRodriguez-Menendez, H  uhttps://scarabnet.myspecies.info/effctes-antiparasitic-drug-ivermectin-development-and-survival-dung-breeding-fly-orthelia-cornicina-