Discrete water quality sampling at open-water aquaculture sites: limitations and strategies

作者：HM Jansen, GK Reid, RJ Bannister, Vivian Husa, SMC Robinson, Jerry Cooper, Cheryl Quinton, Øivind Strand · 发表于：Aquaculture Environment Interactions · 年份：2016 · DOI：10.3354/aei00192 · 被引用次数：24 · 研究领域：Marine Bivalve and Aquaculture Studies、Marine and coastal ecosystems、Fish Ecology and Management Studies

While environmental performance of cage-based aquaculture is most often monitored through benthic conditions, there may also be requirements that necessitate discrete, pelagic sampling. In the pelagic realm, adequately capturing the spatial and temporal dynamics of interest and attributing causality to aquaculture processes can be extremely challenging. Conditions are seldom ideal, and data adequacy concerns of discrete samples collected at open-wateraquaculture sites are not uncommon. Further exploration of these challenges is needed. Herein, we aim to explore considerations for study design, analysis, and data interpretation of discrete pelagic sampling. As examples, we present 2 case studies where limited sampling occurred under conditions of complex pelagic dynamics. A Norwegian case study quantified particle abundancearound salmon farms, and aimed to highlight the effects of spatial−temporal variation on sampling design, the need for inclusion of companion parameters, and the benefits of a priori and a posteriori data interpretation strategies. A Canadian case study collected discrete samples to measure ammonium concentrations with continuous current measurements at an Integrated Multi-Trophic Aquaculture (IMTA) farm, to explore issues of complex hydrodynamics, reference site suitability, sampling resolution, data pooling, and post hoc power tests. We further discuss lessons learned and the implications of study design, ambient conditions, physical processes, farm manage...