Kevin Boswell, Ph.D.
Florida International University
Evaluating fine-scale nekton dynamics in shallow-estuarine ecosystems using multi-beam acoustics
Wednesday — January 15, 2014
Pacific Forum — 3:00 p.m.
Fine-scale habitat use and partitioning by fishes is difficult to observe in dynamic estuarine and
coastal ecosystems with most studies relying on direct biological capture techniques for
inferring organismal distributional dynamics. Additionally, the temporal domain of nekton
movement and behavior remains largely undescribed as traditional observational techniques
(i.e., optical methods) are impeded by physical characteristics of estuarine ecosystems (e.g.,
suspended load). We report on advances in the application of multi-beam imaging sonars to
elucidate behavioral and fine-scale habitat use patterns of nekton in shallow turbid systems.
Specifically, we address the applied and analytical approaches that offer quantitative metrics to
provide insight into important ecological processes: from individual behavior and energetics, to
trophic interactions, to community and population dynamics. We highlight the use of advanced
technologies in estuaries and coastal ecosystems and offer examples from both fixed and mobile platforms to describe fine-scale temporal and spatial patterns of nekton habitat use and behavior at scales not previously described.