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- W2023369368 abstract "A series of acoustic surveys of zooplankton and micronekton have been performed in the Gulf of Maine (GOM), off the northeast United States, and along the western Antarctic Peninsula (WAP). Similar techniques were used to survey these regions, including multifrequency acoustic backscatter (43, 120, 200, 420, 1000 kHz), MOCNESS, CTD, VPR, and in some instances physical microstructure measurements. The GOM is characterized by heterogeneous zooplankton communities in which biomass is dominated by abundant millimeter sized copepods, but the scattering is frequently dominated by a smaller number of strong scatterers, such as shelled pteropods and gas-bearing siphonophores. Heterogeneous zooplankton communities are also observed in the WAP, but patches of comparatively large (40 mm) Antarctic krill are present and often dominate the scattering. In both regions, striking patterns are evident in the backscatter that can be related to the biological community structure and physical processes. Differences in community structure, however, strongly affect the quantitative inferences that can be made based on the acoustic data. Combining direct biological and environmental information with recently developed scattering models has allowed dominant scatterers to be identified and inferences to be made regarding the physical factors influencing backscatter variability, though only under limited conditions. Highlights from these studies and lessons learned regarding our ability to interpret multifrequency acoustics are presented." @default.
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- W2023369368 date "2005-09-01" @default.
- W2023369368 modified "2023-09-24" @default.
- W2023369368 title "Lessons learned from multifrequency acoustic studies of zooplankton and micronekton in the western Antarctic Peninsula and the Gulf of Maine" @default.
- W2023369368 doi "https://doi.org/10.1121/1.4780170" @default.
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