An inexpensive hydropneumatic apparatus screens macroinvertebrates from bottom samples containing silt, mud, or clay. The elutriator, an acrylic cylinder with screened windows, cemented on an upright plastic funnel, retains benthic fauna while the sediment is washed away. The apparatus yields clean samples and has reduced the time required to sort benthos samples by more than 80%.
Additional publication details
An elutriation apparatus for macroinvertebrates
Limnology and Oceanography
Association for the Sciences of Limnology and Oceanography