TY - JOUR N2 - During a midwinter cruise north of 80oN to Rijpfjorden, Svalbard, the composition and vertical distribution of the zooplankton community were studied using two different samplers 1) a vertically hauled multiple plankton sampler (MPS; mouth area 0.25 m2, mesh size 200 μm) and 2) a horizontally towed Methot Isaacs Kidd trawl (MIK; mouth area 3.14 m2, mesh size 1500 μm). Our results revealed substantially higher species diversity (49 taxa) than if a single sampler (MPS: 38 taxa, MIK: 28) had been used. The youngest stage present (CIII) of Calanus spp. (including C. finmarchicus and C. glacialis) was sampled exclusively by the MPS, and the frequency of CIV copepodites in MPS was double that than in MIK samples. In contrast, catches of the CV-CVI copepodites of Calanus spp. were substantially higher in the MIK samples (3-fold and 5-fold higher for adult males and females, respectively). The MIK sampling clearly showed that the highest abundances of all three Thysanoessa spp. were in the upper layers, although there was a tendency for the larger-sized euphausiids to occur deeper. Consistent patterns for the vertical distributions of the large zooplankters (e.g. ctenophores, euphausiids) collected by the MPS and MIK samplers provided more complete data on their abundances and sizes than obtained by the single net. Possible mechanisms contributing to the observed patterns of distribution, e.g. high abundances of both Calanus spp. and their predators (ctenophores and chaetognaths) in the upper water layers during midwinter are discussed. L1 - http://journals.pan.pl/Content/102200/PDF/10183_Volume38_Issue4_03_paper.pdf L2 - http://journals.pan.pl/Content/102200 PY - 2017 IS - No 4 EP - 484 DO - 10.1515/popore-2017-0023 KW - Abundance and size KW - Arctic KW - Polar night KW - Rijpfjorden KW - Vertical distribution patterns KW - zooplankton A1 - Błachowiak-Samołyk, Katarzyna A1 - Zwolicki, Adrian A1 - Webster, Clare N. A1 - Boehnke, Rafał A1 - Wichorowski, Marcin A1 - Wold, Anette A1 - Bielecka, Luiza PB - Polish Academy of Sciences PB - Committee on Polar Research VL - vol. 38 DA - 2017.12.15 T1 - Characterisation of large zooplankton sampled with two different gears during midwinter in Rijpfjorden, Svalbard SP - 459 UR - http://journals.pan.pl/dlibra/publication/edition/102200 T2 - Polish Polar Research ER -