Micronekton sampling using nets

Interesting paper by Kaartvedt et al (2012, MEPS) about the underestimation of micronekton biomass using large nets. Observe in the figures (below) the avoidance of an open trawl (not fishing) by mesopelagic fishes. Observe also the avoidance of these fishes in front of a fish school. They are able to detect the trawl or the fish school some 10-20 m in advance. It seems clear that estimation of biomass using nets is a chimera. Acoustics and/or video systems should be the choice.