Journal Article

Biomagnification and body distribution of ivermectin in dung beetles

Universidad de Alicante. Centro Iberoamericano de la Biodiversidad, Lobo, Jorge M, Sánchez-Piñero, Francisco, Cortez, Vieyle, Verdú, José R, Biodiversidad y Biotecnología aplicadas a la Biología de la Conservación, Ortiz, Antonio J, Lumaret, Jean-Pierre, Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales

2020

Overview

A terrestrial test system to investigate the biomagnification potential and tissue-specific distribution of ivermectin, a widely used parasiticide, in the non-target dung beetle Thorectes lusitanicus (Jekel) was developed and validated. Biomagnification kinetics of ivermectin in T. lusitanicus was investigated by following uptake, elimination, and distribution of the compound in dung beetles feeding on contaminated faeces. Results showed that ivermectin was biomagnified in adults of T. lusitanicus when exposed to non-lethal doses via food uptake. Ivermectin was quickly transferred from the gut to the haemolymph, generating a biomagnification factor (BMF k ) three times higher in the haemolymph than in the gut after an uptake period of 12 days. The fat body appeared to exert a major role on the biomagnification of ivermectin in the insect body, showing a BMF k 1.6 times higher than in the haemolymph. The results of this study highlight that the biomagnification of ivermectin should be investigated from a global dung-based food web perspective and that the use of these antiparasitic substances should be monitored and controlled on a precautionary basis. Thus, we suggest that an additional effort be made in the development of standardised regulatory recommendations to guide biomagnification studies in terrestrial organisms, but also that it is necessary to adapt existing methods to assess the effects of such veterinary medical products.

• Publisher: Springer Nature,Nature Publishing Group UK,Nature Publishing Group
• Subject: 631/158/2456 / 631/601/1466 / Animals / Antiparasitic agents / Antiparasitic Agents - metabolism / Bioaccumulation / Bioaccumulation - physiology / Biodiversity and Ecology / Biological magnification / Body Size - physiology / Cattle / Coleoptera / Coleoptera - metabolism / Dung / Dung beetles / Environmental Sciences / Fat body / Fat Body - metabolism / Feces / Food webs / Hemolymph / Hemolymph - metabolism / Humanities and Social Sciences / Ivermectin / Ivermectin - metabolism / Medical equipment / Metabolism / multidisciplinary / Organic chemicals / Science / Science (multidisciplinary) / Test systems / Veterinary medicine