Table 2.
Zooplankton abundance and biomass in the Fram Strait and in the Southern Barents Sea, winter 2021.
| Fram Strait | Barents Sea | |||
|---|---|---|---|---|
| Abundance | Biomass | Abundance | Biomass | |
| Taxon | 0–50 m/ 50 m–bottom |
0–50 m/ 50 m–bottom |
0–50 m/ 50 m–bottom |
0–50 m/ 50 m–bottom |
| Copepoda | ||||
| Acartia longiremis | 2 ± 0/<1 | <0.1/<0.1 | 44 ± 18/7 ± 3 | 0.4 ± 0.2/0.1 ± 0 |
| Aetideopsis armatus | -/<1 | -/<0.1 | -/- | -/- |
| Bradyidius similis | <1/<1 | <0.1/<0.1 | -/<1 | -/<0.1 |
| Calanus finmarchicus | 20 ± 7/22 ± 10 | 3 ± 1/3 ± 1 | 8 ± 4/162 ± 42 | 1.3 ± 0.8/34 ± 9.2 |
| Calanus glacialis | 38 ± 21/14 ± 4 | 6.8 ± 4/3.7 ± 1.5 | 1 ± 1/17 ± 4 | 0.2 ± 0.1/3.6 ± 1.1 |
| Calanus hyperboreus | 1 ± 0/3 ± 1 | 0.1 ± 0/0.9 ± 0.5 | <1/2 ± 1 | <1/0.3 ± 0.1 |
| Centropages hamatus | -/- | -/- | 2 ± 1/1 ± 0 | <0.1/<0.1 |
| Chiridius obtusifrons | -/<1 | -/<0.1 | -/- | -/- |
| Copepoda nauplii | <1/<1 | <0.1/<0.1 | -/- | -/- |
| Gaetanus tenuispinus | -/1 ± 0 | -/0.2 ± 0.1 | -/- | -/- |
| Gaidius brevispinus | -/<1 | -/<0.1 | -/- | -/- |
| Heterorhabdus norvegicus | -/<1 | -/<0.1 | -/- | -/- |
| Jaschnovia brevis | -/<1 | -/<0.1 | -/- | -/- |
| Metridia longa | 13 ± 3/11 ± 3 | 1.4 ± 0.4/1.1 ± 0.2 | 1 ± 0/46 ± 18 | 0.1 ± 0.1/4.5 ± 1.9 |
| Metridia lucens | 14 ± 3/4 ± 1 | 0.5 ± 0.2/0.1 ± 0 | 129 ± 48/27 ± 11 | 3.5 ± 1.4/0.7 ± 0.4 |
| Microcalanus pusillus | 32 ± 7/7 ± 4 | <0.1/<0.1 | 76 ± 10/32 ± 16 | 0.1 ± 0/<0.1 |
| Microcalanus pygmaeus | 88 ± 8/12 ± 2 | 0.1 ± 0/<0.1 | 51 ± 8/35 ± 7 | 0.1 ± 0/<0.1 |
| Microsetella norvegica | -/- | -/- | <1/- | <0.1/- |
| Oithona atlantica | 10 ± 3/7 ± 4 | <0.1/<0.1 | 3 ± 1/10 ± 4 | <0.1/<0.1 |
| Oithona similis | 364 ± 66/67 ± 33 | 0.4 ± 0.1/0.1 ± 0 | 177 ± 25/122 ± 34 | 0.2 ± 0/0.1 ± 0 |
| Triconia borealis | 1 ± 1/1 ± 0 | <0.1/<0.1 | -/- | -/- |
| Paraeuchaeta spp. I–IV | -/1 ± 0 | -/0.2 ± 0.1 | -/<1 | -/<0.1 |
| Paraeuhaeta glacialis V–VI | <1/<1 | <0.1/0.7 ± 0.2 | -/<1 | -/<0.1 |
| Paraeuhaeta norvegica V–VI | <1/1 ± 0 | <0.1/0.8 ± 0.5 | -/<1 | -/<0.1 |
| Pseudocalanus spp. I–IV | 175 ± 33/33 ± 4 | 0.6 ± 0.1/0.1 ± 0 | 87 ± 8/14 ± 6 | 0.3 ± 0/0.1 ± 0 |
| Pseudocalanus minutus V–VI | 108 ± 23/31 ± 3 | 1 ± 0.2/0.3 ± 0 | 12 ± 2/14 ± 5 | 0.1 ± 0/0.1 ± 0.1 |
| Pseudocalanus acuspes V–VI | 41 ± 7/14 ± 3 | 0.3 ± 0.1/0.1 ± 0 | 8 ± 2/9 ± 6 | 0.1 ± 0/0.1 ± 0 |
| Scolecithricella minor | -/1 ± 0 | -/<0.1 | -/- | -/- |
| Temora longicornis | -/- | -/- | <1/<1 | <0.1/<0.1 |
| Ostracoda | ||||
| Boroecia borealis | <1/1 ± 0 | <0.1/<0.1 | -/- | -/- |
| Discoconchoecia elegans | -/<1 | -/<0.1 | -/- | -/- |
| Boroecia maxima | -/<1 | -/<0.1 | -/- | -/- |
| Amphipoda | ||||
| Themisto abyssorum | -/- | -/- | -/<1 | -/<0.1 |
| Themisto libellula | -/<1 | -/0.1 ± 0.1 | -/- | -/- |
| Euphausiacea | ||||
| Meganyctyphanes norvegica | -/<1 | -/0.4 ± 0.1 | -/<1 | -/0.2 ± 0.1 |
| Thysanoessa inermis | -/<1 | -/0.6 ± 0.2 | -/<1 | -/0.1 ± 0 |
| Thysanoessa longicaudata | <1/<1 | <0.1/0.2 ± 0.1 | <1/<1 | <0.1/<0.1 |
| Nematoscelis megalops | -/<1 | -/<0.1 | -/- | -/- |
| Themisto abyssorum | -/- | -/- | -/<1 | -/<0.1 |
| Themisto libellula | -/<1 | -/0.1 ± 0.1 | -/- | -/- |
| Decapoda | ||||
| Pandalus borealis larvae | -/<1 | -/<0.1 | -/- | -/- |
| Cnidaria | ||||
| Aglantha digitale | <1/1 ± 0 | <0.1/0.2 ± 0 | <1/<1 | <0.1/0.2 ± 0 |
| Dimophyes arctica | <1/<1 | <0.1/<0.1 | -/- | -/- |
| Rathkea octopunctata | <1/- | <0.1/- | -/- | -/- |
| Physophora hydrostatica necthophore | -/<1 | -/<0.1 | <1/<1 | <0.1/<0.1 |
| Pandalus borealis larvae | -/<1 | -/<0.1 | -/- | -/- |
| Ctenophora | ||||
| Beroe cucumis | -/- | -/- | <1/<1 | <0.1/<0.1 |
| Mertensia ovum | <1/<1 | <0.1/0.1 ± 0.1 | <1/<1 | <0.1/<0.1 |
| Pleurobrachia pileus | -/<1 | -/<0.1 | -/- | -/- |
| Polychaeta | ||||
| Pelagobia longicirrata | <1/<1 | <0.1/<0.1 | -/<1 | -/<0.1 |
| Tomopteris helgolandica | -/<1 | -/<0.1 | -/<1 | -/<0.1 |
| Polychaeta larvae | 1 ± 0/- | <0.1/- | -/<1 | -/<0.1 |
| Nemertini | ||||
| Nemertini juv. | -/- | -/- | -/<1 | -/<0.1 |
| Gastropoda | ||||
| Clione limacina larvae | <1/<1 | <0.1/<0.1 | -/- | -/- |
| Clione limacina | <1/<1 | <0.1/0.3 ± 0.1 | -/- | -/- |
| Limacina helicina larvae | 4 ± 1/2 ± 1 | 0.2 ± 0.1/0.1 ± 0.1 | 1 ± 0/1 ± 0 | <0.1/0.1 ± 0 |
| Limacina helicina | 1 ± 0/1 ± 0 | 0.1 ± 0.1/0.1 ± 0 | <1/1 ± 0 | <0.1/0.2 ± 0 |
| Limacina retroversa | 1 ± 0/<1 | 0.1 ± 0/<0.1 | <1/1 ± 0 | <0.1/0.1 ± 0 |
| Gastropoda larvae | -/<1 | -/<0.1 | <1/<1 | <0.1/<0.1 |
| Chaetognatha | ||||
| Eukrohnia hamata | -/<1 | -/0.4 ± 0.2 | -/<1 | -/0.3 ± 0.2 |
| Parasagitta elegans | 2 ± 0/3 ± 2 | 1.3 ± 0.3/1.6 ± 1 | <1/<1 | <0.1/0.8 ± 0.3 |
| Appendicularia | ||||
| Oikopleura juv. | 2 ± 0/<1 | <0.1/<0.1 | <1/- | <0.1/- |
| Oikopleura vanhoeffeni | <1/<1 | <0.1/<0.1 | -/- | -/- |
Note. ‘-’—taxon not found.