caa a22 4500 465763480 CHVBK 20180323111906.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00233705 doi (NATIONALLICENCE)springer-10.1007/BF00233705 Distribution, size frequencies and maturity stages of krill, Euphausia superba , in relation to sea-ice in the Northern Weddell Sea [Elektronische Daten] [V. Siegel, B. Bergström, J. Strömberg, P. Schalk] Summary: The spring (November) and early summer (December) distribution pattern and demography of Euphausia superba in the seasonally ice covered areas of the north-western Weddell Sea are described. Sampling with a Rectangular Midwater Trawl (RMT) and during SCUBA diving were undertaken in the pack-ice during the EPOS expedition 1988/1989 of RV Polarstern. These data were compared with former cruises during late winter (October) and summer (February). The biomass values of krill (1-27 g/m2) in the water column within the ice covered areas were of the same order of magnitude as earlier acoustic estimates in the ice-edge region of the same area. No significant correlation between percentage ice cover and krill abundance in the water column was found. Cluster analyses of size frequency distributions and maturity stage composition revealed the demography of the animals sampled. Samples obtained by SCUBA and RMT are compatible and results show a geographic and demographic separation of the krill. It is proposed that krill in the northern zone are largely emigrants from the Bellingshausen Sea, while the krill in the southern zone are of eastern Weddell Sea origin. Further studies concentrating on the under-ice distribution of krill are recommended. Springer-Verlag, 1990 Siegel V. Bundesforschungsanstalt für Fischerei, Institut für Seefischerei, Palmaille 9, D-2000, Hamburg 50, Federal Republic of Germany aut Bergström B. Kristinebergs Marinbiologiska Station, Kristineberg 2130, S-45034, Fiskebäckskil, Sweden aut Strömberg J. Kristinebergs Marinbiologiska Station, Kristineberg 2130, S-45034, Fiskebäckskil, Sweden aut Schalk P. Alfred-Wegener-Institut für Polar- und Meeresforschung, Columbusstraße, D-2850, Bremerhaven, Federal Republic of Germany aut Polar Biology Springer-Verlag 10/7(1990-08-01), 549-557 0722-4060 10:7<549 1990 10 300 https://doi.org/10.1007/BF00233705 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00233705 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Siegel V. Bundesforschungsanstalt für Fischerei, Institut für Seefischerei, Palmaille 9, D-2000, Hamburg 50, Federal Republic of Germany aut NATIONALLICENCE 700 1- Bergström B. Kristinebergs Marinbiologiska Station, Kristineberg 2130, S-45034, Fiskebäckskil, Sweden aut NATIONALLICENCE 700 1- Strömberg J. Kristinebergs Marinbiologiska Station, Kristineberg 2130, S-45034, Fiskebäckskil, Sweden aut NATIONALLICENCE 700 1- Schalk P. Alfred-Wegener-Institut für Polar- und Meeresforschung, Columbusstraße, D-2850, Bremerhaven, Federal Republic of Germany aut NATIONALLICENCE 773 0- Polar Biology Springer-Verlag 10/7(1990-08-01), 549-557 0722-4060 10:7<549 1990 10 300 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer