Long-term monitoring of fish farms: Application of Nematode/Copepod index to oligotrophic conditions

► The Ne/Co index is used for the first time in oligotrophic areas (e.g. Canary Islands), with good results. ► Differences on meiofauna assemblage structure were found between impact and control locations. ► Differences in current intensity triggered differences between both study sites with no environmental perturbations discerned in the most exposed area.