An 8-year cycle in krill biomass density inferred from acoustic surveys conducted in the vicinity of the South Shetland Islands during the austral summers of 1991–1992 through 2001–2002

By R. Hewitt, David A. Demer, J. Emery. 2003

113 citations recorded by the source corpus.

Subfields: Ecology, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/9a51470c7b9813ce6fb4e8f2b6882130d9e986c4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

1. V. Siegel
2. J. Watkins
3. C. Reiss
4. V. Loeb
5. Anthony M. Cossio
6. David A. Demer
7. Stéphane G. Conti
8. A. Miller

In Global and Planetary Change

1. V. Siegel
2. V. Loeb
3. C. Reiss
4. J. Watkins
5. R. Ross
6. L. Quetin
7. Anthony M. Cossio
8. David A. Demer

Citations in the corpus

• Distribution and population dynamics of Euphausia superba: summary of recent findings (2005, methodology): “One long-term time-series exists in the Elephant Island/South Shetland Islands area.”
• Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea (2004, unknown): “…shift for Adélie penguins at Admiralty Bay (CEMP index A2) and CEMP index C1 at Seal Island and Cape Shirreff were compared with acoustic estimates of krill biomass density from Hewitt and Demer (1994), Hewitt et al. (2003) and unpublished data held by the US Southwest Fisheries Science Center.”
• Effects of climate change and fisheries bycatch on Southern Ocean seabirds : a review (2012, unknown): “Although the causes (or pre - dators) of this decline are still being debated (Hewitt et al. 2003, Ainley et al. 2007), a significant negative correlation between krill density and mean sea-surface temperature at South Georgia has been found for the period from 1928 to 2003, suggesting a largescale…”
• Foraging-Niche Separation of Breeding Gentoo and Chinstrap Penguins, South Shetland Islands, Antarctica (2010, background): “Another formerly abundant congener at Admiralty Bay, the Adélie Penguin, has also had a precipitous population decline in the last two decades (Hinke et al. 2007).”
• New target-strength model indicates more krill in the Southern Ocean (2005, methodology): “This, however, could be due to zooplankton or other species being misinterpreted as krill (Hewitt et al., 2003) using the two-frequency technique for species identification (Hewitt et al., 2002; Watkins and Brierley, 2003).”
• Variations in the biomass of Antarctic krill (Euphausia superba) around the South Shetland Islands, 1996–2006 (2008, methodology): “…different frequencies (38, 70, 120, and 200 kHz), then relates volume–backscattering strengths (Sv; dB re 1 m 21) at the different frequencies to apportion the integrated volume–backscattering coefficient (NASC; m2 nautical mile22) to krill and other cohabitant scatterers (see Hewitt et al., 2003).”
• Krill, Currents, and Sea Ice: Euphausia superba and Its Changing Environment (2006, background): “Since the 1980s, mesoscale (approximately 10,000 km2) acoustic krill surveys have been carried out regularly in the South Atlantic, and these have stimulated the examination of time series of regional krill abundance along with sea ice records (Hewitt et al. 2003).”
• Marine pelagic ecosystems: the West Antarctic Peninsula (2007, background): “For example, a shorter acoustic time-series from the northern tip of the AP shows different patterns than the net-tow time-series (Hewitt et al. 2003).”
• Distribution, Biomass and Demography of Antarctic Krill, Euphausia superba (2016, background): “These regular and standardized surveys of krill abundance in the Atlantic sector have revealed wide year-to-year variations in krill biomass (Siegel and Loeb 1995; Brierley et al. 1999a, b, 2002a; Hewitt et al. 2003; Reiss et al. 2008; Fielding et al. 2014).”