Records of Boeckella poppei (Mrazek, 1901) (Calanoida: Centropagidae) obtained during Ukrainian Antarctic Expeditions

Study Extent

The study was done on 114 samples of invertebrates collected in 2005–2006, 2008–2009, 2015–2019, and 2021–2023 UAEs. We collected the material mostly within the Wilhelm Archipelago, with some taken on the South Shetlands, King George Island, Nelson Island, and De caption Island.

Sampling

We condensed a known volume of water through a small Apstein net with a mesh size of 100 μm. If we could not concentrate the sample in situ, the water was transported to the laboratory in tanks made of chemically inert plastic and filtered through the gauze with a mesh size of 100 μm. If the lake was covered with ice, a well was cut to sample it. A sample was collected from 5 to 50 liters of water, depending on the size of the reservoir and the visible number of copepods inside. The remaining water was removed using a pipette with its tip covered by gauze. The residue was fixed in 96% ethanol, signed, and transported to Ukraine for analysis.

Quality Control

Boeckella poppei was identified according to Bayly , using a stereoscopic microscope MBS-10 (USSR) and a trinocular microscope Euromex (the Netherlands).

Method steps

1. We condensed a known volume of water through a small Apstein net with a mesh size of 100 μm.
2. Specimens were immediately preserved in 96%
3. Identification of specimens in Department of population dynamics (Institute for evolutionary ecology NAS Ukraine, Kyiv)

1. Animalia
   rank: kingdom
2. Arthropoda
   rank: phylum
3. Crustacea
   rank: subphylum
4. Calanoida
   rank: order
5. Centropagidae
   rank: family
6. Boeckella
   rank: genus
7. Boeckella poppei (Mrazek, 1901)
   rank: species

We collected the material mostly within the Wilhelm Archipelago, with some taken on the South Shetlands, King George Island, Nelson Island, and De caption Island.