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Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography

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Abstract

The motivation of the LAKRIS project (Lazarev Krill Study) was to investigate the seasonal and interannual variability in distribution, demography, phenology and population dynamics of Antarctic krill Euphausia superba in poorly studied high-latitude areas. The core data set consists of four RMT-net-sampling surveys that were conducted in early summer (December 2005 and 2007), autumn (April 2004) and winter (July to August 2006). Supplementary data were analysed from the 1980s to view the results in a wider geographical context. The major observations are the following: (1) krill abundance and distribution showed geographical, seasonal and interannual fluctuations. Krill abundance was almost one order of magnitude lower compared to the Southwest Atlantic. (2) Krill density showed substantial differences between day and night for autumn and winter surveys. (3) A spatial gradient was observed for krill size groups, with larger sized (adult spawning) krill further south and medium-sized juveniles and immatures mainly between 60° and 67°S. (4) Data on maturity stage composition and larvae occurrence indicate an active and successful spawning in these high-latitude areas even under the conditions of sea-ice cover. At the end of the spawning season, females and males regressed in their external sexual characteristics (‘re-juvenation’) to overwintering immature stages. Major conclusions relate to a conceptual view of the spatial distribution of krill size classes and the occurrence of larvae in the context of major oceanographic features and current systems in the Lazarev Sea and adjacent ocean sectors. The Lazarev Sea obviously does not support a single self-maintaining population, but represents a complex transition zone of stocks with different origins from the Scotia Sea and the Cosmonaut Sea.

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References

  • Atkinson A, Siegel V, Pakhomov EA, Rothery P, Loeb V, Ross RM, Quetin LB, Schmidt K, Fretwell P, Murphy EJ, Tarling GA, Fleming AH (2008) Oceanic circumpolar habitats of Antarctic krill. Mar Ecol Prog Ser 362:1–23

    Article  CAS  Google Scholar 

  • Atkinson A, Siegel V, Pakhomov EA, Jessopp MJ, Loeb V (2009) A re-appraisal of the total biomass and annual production of Antarctic krill. Deep-Sea Res I 56:727–740

    Article  Google Scholar 

  • Baker AC, Clarke MR, Harris MJ (1973) The N.I.O. Combination Net (RMT 1 + 8) and further developments of Rectangular Midwater Trawls. J Mar Biol Assoc UK 53:167–184

    Article  Google Scholar 

  • Baker AC, Boden BP, Brinton E (1990) A practical guide to the euphausiids of the world. Natural History Museum Publications, London, 96 pp

    Google Scholar 

  • Beckmann A, Hellmer HH, Timmermann R (1999) A numerical model of the Weddell Sea: large-scale circulation and water mass distribution. J Geophys Res Oceans 104:23375–23391

    Article  Google Scholar 

  • Bergström BI, Hempel G, Marschall HP, North A, Siegel V, Strömberg JO (1990) Spring distribution, size composition and behaviour of krill Euphausia superba in the western Weddell Sea. Polar Rec 26:85–89

    Article  Google Scholar 

  • BIOMASS (1981) Report of the Ad Hoc Acoustic Working Group of the Post-FIBEX Data Interpretation Workshop. BIOMASS Rep Ser, 60 pp

  • Brinton E (1991) Distribution and population structure of immature and adult Euphausia superba in the western Bransfield Strait region during the 1986–1987 summer. Deep Sea Res 38:1169–1193

    Article  Google Scholar 

  • Brown M, Kawaguchi S, King R, Virtue P, Nicol S (2011) Flexible adaptation of the seasonal krill maturity cycle in the laboratory. J Plankton Res 33:821–826

    Article  Google Scholar 

  • Cavalieri DJ, Parkinson CL (2008) Antarctic sea ice variability and trends, 1979–2006. J Geophys Res 113, C07004, 19 pp. doi:10.1029/2007JC004564

  • Cisewski B, Strass VH, Rhein M, Krägefsky S (2010) Seasonal variation of diel vertical migration of zooplankton from ADCP backscatter time series data in the Lazarev Sea. Antarctica Deep-Sea Res I 57:78–94

    Article  CAS  Google Scholar 

  • Cisewski B, Strass VH, Leach H (2011) Circulation and transport of water masses in the Lazarev Sea, Antarctica, during summer and winter 2006. Deep-Sea Res I 58:186–199

    Article  Google Scholar 

  • Cuzin-Roudy J (1987a) Gonad history of the Antarctic krill Euphausia superba Dana during its breeding season. Polar Biol 7:237–244

    Article  Google Scholar 

  • Cuzin-Roudy J (1987b) Sexual differentiation in the Antarctic krill Euphausia superba Dana (Crustacea: Euphausiacea). J Crust Biol 7:518–524

    Article  Google Scholar 

  • Cuzin-Roudy J, Amsler MOL (1991) Ovarian development and sexual maturity staging in Antarctic krill, Euphausia superba Dana (Euphausiacea). J Crust Biol 11:236–249

    Article  Google Scholar 

  • Cuzin-Roudy J, Labat JP (1992) Early summer distribution of Antarctic krill sexual development in the Scotia-Weddell region: a multivariate approach. Polar Biol 12:65–74

    Article  Google Scholar 

  • Daly KL (1990) Overwintering development, growth, and feeding of larval Euphausia superba in the Antarctic marginal ice zone. Limnol Oceanogr 35:1564–1576

    Article  Google Scholar 

  • Daly KL (2004) Overwintering growth and development of larval Euphausia superba: an interannual comparison under varying environmental conditions west of the Antarctic Peninsula. Deep-Sea Res II 51:2139–2168

    Article  CAS  Google Scholar 

  • Daly KL, Macaulay MC (1991) Influence of physical and biological mesoscale dynamics on the seasonal distribution and behavior of Euphausia superba in the Antarctic marginal ice zone. Mar Ecol Prog Ser 79:37–66

    Article  Google Scholar 

  • de la Mare WK (1994a) Modelling krill recruitment. CCAMLR Sci 1:49–54

    Google Scholar 

  • de la Mare WK (1994b) Estimating confidence intervals for fish stock abundance estimates from trawl surveys. CCAMLR Sci 1:203–207

    Google Scholar 

  • Deacon GER (1979) The Weddell Gyre. Deep-Sea Res 26A:981–995

    Article  Google Scholar 

  • Demer DA, Hewitt RP (1995) Bias in acoustic biomass estimates of Euphausia superba due to diel vertical migration. Deep-Sea Res 42:455–475

    Article  Google Scholar 

  • El-Sayed SZ (1994) Southern ocean ecology. The BIOMASS perspective. Cambridge University Press, Cambridge 399 pp

    Google Scholar 

  • Everson I (1983) Estimation of krill abundance. Ber Polarforsch 4:156–168

    Google Scholar 

  • Everson I (2000) The Southern Ocean. The Southern Ocean food web. In: Everson I (ed) Fish and aquatic resources series. Krill: Biology, Ecology and Fisheries, vol 6. Blackwell Science, pp 1–348

  • Fahrbach E, Rohardt G, Schröder M, Strass V (1994) Transport and structure of the Weddell Gyre. Ann Geophys 12:840–855

    Article  Google Scholar 

  • Fevolden SE (1979) Investigations on krill (Euphausiacea) sampled during the Norwegian Antarctic Research Expedition 1976/1977. Sarsia 64:189–198

    Google Scholar 

  • Fevolden SE (1980) Krill off Bouvetöya and in the southern Weddell Sea with a description of larval stages of Euphausia crystallorophias. Sarsia 65:149–162

    Google Scholar 

  • Flores H, Van den Putte A, Siegel V, Pakhomov EA, Van Franeker JA, Meesters HWG, Volckaert FAM (2008) Distribution, abundance and ecological relevance of pelagic fishes in the Lazarev Sea, Southern Ocean. Mar Ecol Prog Ser 367:271–282

    Article  Google Scholar 

  • Fraser FC (1936) On the development and distribution of the young stages of krill (Euphausia superba). Discov Rep 14:1–192

    Google Scholar 

  • Gordon AL, Huber BA (1995) Warm weddell deep water west of Maud Rise. J Geophys Res 100:13747–13753

    Article  Google Scholar 

  • Gouretski VV, Danilov AI (1993) Weddell Gyre structure of the eastern boundary. Deep-Sea Res I 40:561–582

    Article  Google Scholar 

  • Gouretski VV, Danilov AI (1994) Characteristics of warm rings in the African sector of the Antarctic Circumpolar Current. Deep-Sea Res I 41:1131–1157

    Article  Google Scholar 

  • Hempel I (1982) On the distribution of krill larvae Euphausia superba in the central Scotia Sea during FIBEX 1981 (in German). Arch FischWiss 33:89–95

    Google Scholar 

  • Hempel I, Hempel G (1982) Distribution of euphausiid larvae in the southern Weddell Sea. Meeresforsch 29:253–266

    Google Scholar 

  • Hill HJ, Trathan PN, Croxall JP, Watkins JL (1996) A comparison of Antarctic krill Euphausia superba caught by nets and taken by macaroni penguins Eudyptes chrysolophus: evidence for selection. Mar Ecol Prog Ser 140:1–11

    Article  Google Scholar 

  • Hosie GW, Ikeda T, Stolp M (1988) Distribution, abundance and population structure of the Antarctic krill (Euphausia superba Dana) in the Prydz Bay region, Antarctica. Polar Biol 8:213–224

    Article  Google Scholar 

  • Hunt BPV, Pakhomov EA, Siegel V, Strass V, Cisewski B, Bathmann U (2011) The seasonal cycle of the Lazarev Sea macrozooplankton community and a potential shift to top-down trophic control in winter. Deep-Sea Res II 58:1662–1676

    Article  CAS  Google Scholar 

  • Huntley ME, Niiler PP (1995) Physical control of population dynamics in the Southern Ocean. J Mar Sci 52:45–468

    Google Scholar 

  • Ikeda T (1984) Development of the larvae of the Antarctic krill (Euphausia superba Dana) observed in the laboratory. J Exp Mar Biol Ecol 75:107–117

    Article  Google Scholar 

  • Jarvis T, Kelly N, Kawaguchi S, van Wijk E, Nicol S (2010) Acoustic characterisation of the broad-scale distribution and abundance of Antarctic krill (Euphausia superba) off East Antarctica (30–80 E) in January-March 2006. Deep-Sea Res II 57:916–933

    Article  Google Scholar 

  • John DD (1936) The southern species of the genus Euphausia. Discovery Rep 14:193–324

    Google Scholar 

  • Kawaguchi S, Nicol S (2007) Learning about Antarctic krill from the fishery. Antarct Sci 19:219–230

    Article  Google Scholar 

  • Kawaguchi S, Nicol S, Virtue P, Davenport SR, Casper R, Swadling KM, Hosie GW (2010) Krill demography and large-scale distribution in the Western Indian Ocean sector of the Southern Ocean (CCAMLR Division 58.4.2) in austral summer of 2006. Deep-Sea Res II 57:934–947

    Article  Google Scholar 

  • Kils U (1983) Swimming and feeding of Antarctic krill, Euphausia superba—some outstanding energetics and dynamics—some unique morphological details. Ber Polarforsch 4:130–155

    Google Scholar 

  • Kirkwood JM (1982) A guide to the Euphausiacea of the Southern Ocean. ANARE Res Notes 1:1–45

    Google Scholar 

  • Klatt O, Fahrbach E, Hoppema M, Rohardt G (2005) The transport of the Weddell Gyre across the Prime Meridian. Deep-Sea Res II 52:513–528

    Article  Google Scholar 

  • Krafft BA, Melle W, Knutsen T, Bagøien B, Broms C, Ellertsen B, Siegel V (2010) Distribution and demography of Antarctic krill in the Southeast Atlantic sector of the Southern Ocean during the austral summer 2008. Polar Biol 33:957–968

    Article  Google Scholar 

  • Lascara CM, Hofmann EE, Ross RM, Quetin LB (1999) Seasonal variability in the distribution of Antarctic krill, Euphausia superba, west of the Antarctic Peninsula. Deep-Sea Res 46:951–984

    Article  Google Scholar 

  • Mackintosh NA (1973) Distribution of post-larval krill in the Antarctic. Discov Rep 36:95–156

    Google Scholar 

  • Makarov RR (1975) A study of the second maturation of euphausiid (Eucarida, Euphausiacea) females (in Russian). Zool Zhurn 54:670–681

    Google Scholar 

  • Makarov RR, Denys CJ (1982) Stages of sexual maturity of Euphausia superba. BIOMASS Handbook 11:1–13

    Google Scholar 

  • Makarov RR, Menshenina LL (1992) Larvae of euphausiids off Queen Maud Land. Polar Biol 11:515–523

    Article  Google Scholar 

  • Makarov RR, Sysoeva MV (1983) The biological state and distribution of Euphausia superba Dana in the Lazarev Sea and adjacent waters (in Russian). In: Lubimova TG, Makarov RR, Kamenskaya EA (eds) Antarctic krill. The distribution pattern and environment. Collected papers. Moscow VNIRO, pp 110–117

  • Makarov RR, Sysoyeva MV (1985) Biology and distribution of Euphausia superba in the Lazarev Sea and adjacent Waters. Hydrobiol J (Gidrobiologiceskij Zhurnal Kiev) 23:95–99

    Google Scholar 

  • Makarov RR, Solyankin EV, Shevtsov VV (1985) Environmental conditions and adaptive features of the biology of Euphausia superba Dana in the Lazarev Sea (in Russian). Antarktika. Doklady Komissii 24:158–171

    Google Scholar 

  • Makarov RR, Menshenina LL, Solyankin EV (1992) Euphausiid larvae in eastern part of the Weddell Gyre (in Russian). Okenaologija 32:276–284

    Google Scholar 

  • Marr JWS (1962) The natural history and geography of the Antarctic krill (Euphausia superba Dana). Discov Rep 32:33–464

    Google Scholar 

  • Marrari M, Daly KL, Timonin A, Semenova T (2011) The zooplankton of Marguerite Bay, western Antarctic Peninsula—Part II: Vertical distributions and habitat partitioning. Deep-Sea Res II 58:1614–1629

    Article  CAS  Google Scholar 

  • Maslennikov VV (1980) Modern concepts on the large-scale circulation of the Antarctic waters and the routes of mass drift of the Antarctic krill (in Russian). In: Lubimova TG (ed) Biological resources of the Antarctic krill. Moscow, VNIRO, pp 8–27

  • Mauchline J (1980) The biology of mysids and euphausiids. Adv Mar Biol 18:681

    Article  Google Scholar 

  • Meyer B, Auerswald L, Siegel V, Spahic S, Pape C, Fach B, Teschke M, Lopata AL, Fuentes V (2010) Seasonal variation in body composition, metabolic activity, feeding, and growth of adult krill Euphausia superba in the Lazarev Sea. Mar Ecol Prog Ser 398:1–18

    Article  CAS  Google Scholar 

  • Miller DGM, Hampton I (1989) Biology and ecology of Antarctic krill (Euphausia superba Dana): a review. BIOMASS Sci Ser 9:1–166

    CAS  Google Scholar 

  • Nishikawa J, Toczko S, Hosie GW (2010) Distribution and community structure of euphausiids in the Southern Ocean along the 140 E meridian during austral summer 2001/2002. Deep-Sea Res II 57:559–564

    Article  Google Scholar 

  • Orsi AH, Nowlin WD Jr, Whitworth T III (1993) On the circulation and stratification of the Weddell Gyre. Deep-Sea Res I 40:169–203

    Article  Google Scholar 

  • Orsi AH, Whitworth T III, Nowlin WDJ (1995) On the meridional extent and fronts of the Antarctic Circumpolar Current. Deep-Sea Res 42:641–673

    Article  Google Scholar 

  • Pakhomov EA (2000) Demography and life cycle of Antarctic krill, Euphausia superba, in the Indian sector of the Southern Ocean: long-term comparison between coastal and open-ocean regions. Can J Fish Aquat Sci 57:68–90

    Article  Google Scholar 

  • Pakhomov EA, Perissinotto R, McQuaid CD, Froneman PW (2000) Zooplankton structure and grazing in the Atlantic sector of the Southern Ocean in late austral summer 1993. Part 1. Ecological zonation. Deep-Sea Res I 47:1663–1686

    Article  Google Scholar 

  • Pakhomov EA, Dubischar CD, Hunt BPV, Strass V, Cisewski B, Siegel V, von Harbou L, Gurney L, Kitchener J, Bathmann U (2011) Biology and life cycles of pelagic tunicates in the Lazarev Sea, Southern Ocean. Deep-Sea Res II 58:1677–1689

    Article  Google Scholar 

  • Poleck TP, Denys CJ (1982) Effect of temperature on the moulting, growth and maturation of the Antarctic krill Euphausia superba (Crustacea: Euphausiacea) under laboratory conditions. Mar Biol 70:255–265

    Article  Google Scholar 

  • Pommeranz T, Herrmann C, Kühn A (1982) Mouth angles of the Rectangular Midwater Trawl (RMT1 + 8) during paying out and hauling. Rep Mar Res 29:267–274

    Google Scholar 

  • Quetin LB, Ross RM (2001) Environmental variability and its impact on the reproductive cycle of Antarctic krill. Amer Zool 41:74–89

    Article  Google Scholar 

  • Quetin LB, Ross RM, Frazer TK, Amsler MO, Wyatt-Evens C, Oakes SA (2003) Growth of larval krill, Euphausia superba, in fall and winter west of the Antarctic Peninsula. Mar Biol 143:833–843

    Article  Google Scholar 

  • Rakusa-Suszczewski S (1984) Krill larvae in the Atlantic sector of the Southern Ocean during FIBEX 1981. Polar Biol 3:141–147

    Article  Google Scholar 

  • Reiss CS, Cossio AM, Loeb V, Demer DA (2008) Variations in the biomass of Antarctic krill (Euphausia superba) around the South Shetland Islands, 1996–2006. ICES J Mar Sci 65:497–508

    Article  Google Scholar 

  • Ross RM, Quetin LB (1983) Spawning frequency and fecundity of the Antarctic krill Euphausia superba. Mar Biol 77:201–205

    Article  Google Scholar 

  • Ross RM, Quetin LB, Lascara CM (1996) Distribution of Antarctic krill and zooplankton west of the Antarctic Peninsula. In: Ross RM, Hofmann EE, Quetin LB (eds) Foundations for ecological research west of the Antarctic Peninsula. AGU 70:199–217

  • Schmidt K, Atkinson A, Steigenberger S, Fielding S, Lindsay MCM, Pond DW, Tarling GA, Klevjer TA, Allen CS, Nicol S, Achterberg EP (2011) Seabed foraging by Antarctic krill: implications for stock assessment, bentho-pelagic coupling and the vertical transfer of iron. Limnol Oceanogr 56:1411–1428

    Article  CAS  Google Scholar 

  • Schröder M, Fahrbach E (1999) On the structure and the transport of the eastern Weddell Gyre. Deep Sea Res I 46:501–527

    Google Scholar 

  • Siegel V (1982) Investigations on krill (Euphausia superba) in the southern Weddell Sea. Rep Mar Res 29:244–252

    Google Scholar 

  • Siegel V (1985) On the fecundity of Antarctic krill, Euphausia superba (Euphausiacea). Arch FischWiss 36:185–193

    Google Scholar 

  • Siegel V (1986) Investigations on the biology of Antarctic krill, Euphausia superba, in the Bransfield Strait and adjacent areas (In German). Mitt Inst Seefisch Hamb 38:1–244

    Google Scholar 

  • Siegel V (1987) Age and growth of Antarctic Euphausiacea (Crustacea) under natural conditions. Mar Biol 96:483–495

    Article  Google Scholar 

  • Siegel V (1988) A concept of seasonal variation of krill (Euphausia superba) distribution and abundance west of the Antarctic Peninsula. In: Sahrhage D (ed) Antarctic ocean and resources variability. Springer, Berlin, pp 219–230

    Chapter  Google Scholar 

  • Siegel V (2007) Size selectivity of the RMT8 plankton net and a commercial trawl for Antarctic krill. SC-CAMLR-WG-EMM-07/28, pp 1–9

  • Siegel V, Loeb V (1994) Length and age at maturity of Antarctic krill. Antarct Sci 6:479–482

    Article  Google Scholar 

  • Siegel V, Loeb V (1995) Recruitment of Antarctic krill Euphausia superba and possible causes for its variability. Mar Ecol Prog Ser 123:45–56

    Article  Google Scholar 

  • Siegel V, Bergström B, Mühlenhardt-Siegel U, Thomasson M (2002) Demography of krill in the Elephant Island area during summer 2001 and its significance of stock recruitment. Antarct Sci 14:162–170

    Article  Google Scholar 

  • Siegel V, Kawaguchi S, Ward P, Litvinov F, Sushin V, Loeb V, Watkins J (2004) Krill demography and large-scale distribution in the southwest Atlantic during January/February 2000. Deep-Sea Res II 51:1253–1273

    Google Scholar 

  • Spiridonov V (1995) Spatial and temporal variability in reproductive timing of Antarctic krill (Euphausia superba Dana). Polar Biol 15:161–174

    Article  Google Scholar 

  • Taki K, Hayashi T, Naganobu M (2005) Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data. CCAMLR Sci 12:163–172

    Google Scholar 

  • Tarling GA, Cuzin-Roudy J, Thorpe SE, Shreeve RS, Ward P, Murphy EJ (2007) Recruitment of Antarctic krill Euphausia superba in the South Georgia region: adult fecundity and the fate of larvae. Mar Ecol Prog Ser 331:161–179

    Article  Google Scholar 

  • Thorpe SE, Murphy EJ, Watkins JL (2007) Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: investigating the roles of ocean and sea ice transport. Deep-Sea Res I 54:792–810

    Article  Google Scholar 

  • Wang R, Sun S, Wang K, Li C (2000) Age groups of Antarctic krill, Euphausia superba Dana, in the Prydz Bay region. Chinese J Oceanol Limnol 18:140–147

    Article  Google Scholar 

  • Watkins JL (1999) A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia. CCAMLR Sci 6:71–84

    Google Scholar 

  • Watkins JL (2000) Sampling krill. In: Everson I (ed) Krill biology, ecology and fisheries. Fish and aquatic resources series, vol 6. Blackwell Science, Oxford, pp 8–19

  • Wiebe PH, Ashjian CJ, Lawson GL, Pinones A, Copley NJ (2011) Horizontal and vertical distribution of euphausiid species on the Western Antarctic Peninsula U.S. GLOBEC Southern Ocean study site. Deep-Sea Res II 58:1630–1651

    Article  Google Scholar 

  • Williams GD, Nicol S, Aoki S, Meijers AJS, Bindoff NL, Iijima Y, Marsland SJ, Klocker A (2010) Surface oceanography of BROKE-West, along the Antarctic margin of the south-west Indian Ocean (30–80 E). Deep-Sea Res II 57:738–757

    Article  CAS  Google Scholar 

  • Zar JH (1999) Biological statistics. Prentice Hall, Upper Saddle River, NJ

    Google Scholar 

  • Zhou M, Nordhausen W, Huntley M (1994) ADCP measurements of the distribution and abundance of euphausiids near the Antarctic Peninsula in winter. Deep-Sea Res 41:1425–1445

    Article  Google Scholar 

Download references

Acknowledgments

The author would like to thank the captain and crew of RV ‘Polarstern’ for their professional support during all LAKRIS cruises. The author also acknowledges the support of the colleagues on board, in particular Bosse Bergström. Matilda Haraldsson, Susanne Schöling, Martina Vortkamp and Laura Würzberg for their excellent technical assistance and hard work during long weeks at sea. The author thanks Angus Atkinson (BAS Cambridge) and Christian Reiss (US AMLR Program, La Jolla) for their comments on the draft manuscript as well as one anonymous referee, So Kawaguchi (AAD Kingston Tas) and Robin Ross (Santa Barbara USA) for their critical and constructive comments during the review process, which helped to considerably improve the manuscript. The ancillary data were made available in a joint German–Russian project in cooperation by Vyacheslav Sushin from AtlantNIRO Kaliningrad, Russia. The research was supported by funding from the German Ministry of Education and Research (BMBF) through project 03F0406A, Subproject 1 of the Lazarev Sea Krill Study (LAKRIS) Project. The LAKRIS Project is the German contribution to the Southern Ocean-Global Ocean Ecosystem Dynamics (SO-GLOBEC) program.

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    Volker Siegel

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Siegel, V. Krill stocks in high latitudes of the Antarctic Lazarev Sea: seasonal and interannual variation in distribution, abundance and demography. Polar Biol 35, 1151–1177 (2012). https://doi.org/10.1007/s00300-012-1162-y

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