Interested in acoustics for freshwater invertebrates?
29 October 2018
Although most work on invertebrate acoustics is from marine systems, lakes have some larger invertebrates (e.g. mysids, phantom midge larvae) that are well suited for assessment with hydroacoustics...
Smaller zooplankton like daphnids and copepods may also be amenable to acoustic investigations as spatial structure, if not density, have been obtained also on those animals in lakes.
Lars Rudstam at Cornell University is interested in comparing results from studies that have used acoustics for invertebrates in lakes from around the world. Their ultimate goal is to develop standards for invertebrate acoustics in lakes.
Questions that need looking into are what is the best frequency to use, how to remove scattering from larger targets, how to best use multifrequency data, and how do theoretical scattering models compare with field observations using nets or other samplers to verify acoustic data.
Image: Phantom midge larvae