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High density of ice krill (Euphausia crystallorophias) in the Amundsen sea coastal polynya, Antarctica

Cited 9 time in scopus
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Title
High density of ice krill (Euphausia crystallorophias) in the Amundsen sea coastal polynya, Antarctica
Authors
La, Hyoung Sul
Lee, Hyungbeen
Fielding, Sophie
Kang, Donhyug
Ha, Ho Kyung
Atkinson, Angus
Park, Jisoo
Siegel, Volker
Lee, SangHoon
Shin, Hyoung Chul
Subject
Oceanography
Keywords
Ice krill(Euphausia crystallorophias); Krill identification; Acoustic data; Coastal polynya; Amundsen Sea; Araon
Issue Date
2015
Citation
La, Hyoung Sul, et al. 2015. "High density of ice krill (Euphausia crystallorophias) in the Amundsen sea coastal polynya, Antarctica". Deep-Sea ResearchII,, 95(1): 75-84.
Abstract
High densities of ice krill Euphausia crystallorophias were observed along six acoustic transects within the Amundsen Sea Coastal Polynya, Antarctica. Two-frequency acoustic backscatter data was examined in the austral summers of January 2011 and February 2012. A dB identification window (Sv120-38) identified ice krill dominating the acoustic backscatter. The density of ice krill, calculated with the stochastic distorted-wave born approximation model, ranged between 4.5 and 30 g wet mass m-2 for each transect (a mean of 16 g wet mass m-2 for all transects), these high values are an order of magnitude higher than recorded previously in the Ross Sea Polynya. High densities were detected along the ice shelf and near the boundary between pack ice and coastal polynya, and we postulate that these could be important habitats for ice krill. The high densities observed along the transects make ice krill a potentially important, but poorly known contributor to these high-latitude shelf food webs.
DOI
http://dx.doi.org/10.1016/j.dsr.2014.09.002
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