In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 127, No. 3_Supplement ( 2010-03-01), p. 1729-1729
Kurzfassung:
Polar regions contain some of the most productive (and in some cases unspoiled) ecosystems on the planet. Zooplankton, particularly krill, are the preferred prey for numerous fish, bird, and mammal species including animals that are endangered, commercially fished, or ecologically important. Acoustic echosounders provide an excellent method for assessing the abundance and distribution of zooplankton over large areas ( & gt; 100 s km2) through ship-based surveys and with high-temporal and spatial resolution. However, in order to accurately convert acoustic backscatter into a biologically meaningful measure (e.g., animal abundance, biomass, and calories), validated scattering models with well-understood input parameters are needed. This talk will present data from both Antarctic and Arctic (Bering Sea) zooplankton with regard to improvement of scattering models and the range and variability of model inputs for krill and other zooplankton, implications of these changes on acoustic estimates of zooplankton biomass or other metrics, and how these data may be used in ecosystem studies, particularly the relationships between zooplankton and their higher-trophic level predators.
Materialart:
Online-Ressource
ISSN:
0001-4966
,
1520-8524
Sprache:
Englisch
Verlag:
Acoustical Society of America (ASA)
Publikationsdatum:
2010
ZDB Id:
1461063-2
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