Validation trials of a shipboard filter skid (p3SFS) demonstrate its utility for collecting living zooplankton
2014
Drake, Lisa A. | Moser, Cameron S. | Robbins-Wamsley, Stephanie H. | Riley, Scott C. | Wier, Timothy P. | Grant, Jonathan F. | Herring, Penny R. | First, Matthew R.
Relatively large volumes of water—on the order of cubic meters—must be sampled and analyzed to generate statistically valid estimates of sparsely concentrated organisms, such as in treated ballast water. To this end, a third prototype of a shipboard filter skid (p3SFS) was designed and constructed. It consisted of two housings (each containing a 35μm mesh filter bag) and its own pump and computer controller. Additionally, the skid had a drip sampler, which collected a small volume (∼10L) of whole (unfiltered) water immediately upstream of the housings. Validation of the p3SFS occurred in two segments: (1) land-based trials, in which the collection of organisms ⩾50μm (nominally zooplankton) by the p3SFS was compared to a plankton net, and (2) shipboard trials, in which ballast water was sampled aboard a ship. In both types of trials, the data collected showed the filter skid to be an appropriate flow-through sampling device.
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