(Table 1) Krill (Euphausia superba) biomass estimates at South Georgia Island from 2001-2005 ...

The South Georgia region supports a large biomass of krill that is subject to high interannual variability. The apparent lack of a locally self-maintaining krill population at South Georgia means that understanding the mechanism underlying these observed population characteristics is essential to su...

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Bibliographic Details
Main Authors: Reid, Keith, Watkins, Jon L, Murphy, Eugene J, Trathan, Phil N, Fielding, Sophie, Enderlein, Peter
Format: Dataset
Language:English
Published: PANGAEA 2010
Subjects:
Time coverage
DATE/TIME
Euphausia superba, biomass
Coefficient
Echosounder
International Polar Year 2007-2008 IPY
Euphausia superba
International Polar Year
IPY
South Georgia Island
Online Access:https://dx.doi.org/10.1594/pangaea.819015
https://doi.pangaea.de/10.1594/PANGAEA.819015
Description
Summary:The South Georgia region supports a large biomass of krill that is subject to high interannual variability. The apparent lack of a locally self-maintaining krill population at South Georgia means that understanding the mechanism underlying these observed population characteristics is essential to successful ecosystem-based management of krill fishery in the region. Krill acoustic-density data from surveys conducted in the early, middle and late period of the summers of 2001 to 2005, together with krill population size structure over the same period from predator diet data, were used with a krill population dynamics model to evaluate potential mechanisms behind the observed changes in krill biomass. Krill abundance was highest during the middle of the summer in 3 years and in the late period in 2 years; in the latter there was evidence that krill recruitment was delayed by several months. A model scenario that included empirically derived estimates of both the magnitude and timing of recruitment in each year ... : DATE/TIME is start date. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...

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