Barnabas (1980) proposed a system for collecting zooplankton in lagoons using autonomous and stationary devices, for which I tried to estimate the cost of installation, but would there be another way that is more efficient?
The complete reference of Barnabé is:Barnabé, G. (1980). Système de collecte du zooplancton à l'aide de dispositifs autonomes et stationnaires, in: Billard, R. et al. (1980). La pisciculture en Etang. pp. 215-220
Most of the zooplankton are phototrophic, so they are attracted to a light source. You can use a light source to amass them around the light source at night, then you can use a pump to filter the water on a fine mesh collector and collecting the zooplankton. But most of them will kill, anyway, I think it is worth to try it.
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