Catch me if you can: Comparing ballast water sampling skids to traditional net sampling

作者：Johanna Bradie, Claudio Gianoli, Robert Dallas Linley, Lothar Schillak, G. P. Schneider, Peter Paul Stehouwer, Sarah A. Bailey · 发表于：Journal of Sea Research · 年份：2017 · DOI：10.1016/j.seares.2017.03.009 · 被引用次数：4 · 研究领域：Marine Ecology and Invasive Species、Insect Pheromone Research and Control、Insect and Arachnid Ecology and Behavior

With the recent ratification of the International Convention for the Control and Management of Ships' Ballast Water and Sediments, 2004, it will soon be necessary to assess ships for compliance with ballast water discharge standards. Sampling skids that allow the efficient collection of ballast water samples in a compact space have been developed for this purpose. We ran 22 trials on board the RV Meteor from June 4–15, 2015 to evaluate the performance of three ballast water sampling devices (traditional plankton net, Triton sampling skid, SGS sampling skid) for three organism size classes: ≥ 50 μm, ≥ 10 μm to < 50 μm, and < 10 μm. Natural sea water was run through the ballast water system and untreated samples were collected using paired sampling devices. Collected samples were analyzed in parallel by multiple analysts using several different analytic methods to quantify organism concentrations. To determine whether there were differences in the number of viable organisms collected across sampling devices, results were standardized and statistically treated to filter out other sources of variability, resulting in an outcome variable representing the mean difference in measurements that can be attributed to sampling devices. These results were tested for significance using pairwise Tukey contrasts. Differences in organism concentrations were found in 50% of comparisons between sampling skids and the plankton net for ≥ 50 μm, and ≥ 10 μm to < 50 μm size classes, with net sample...