Use of oxygen microsensors to measure the respiration rates of five dominant copepods and Euphausia crystallorophias furcilia from the Amundsen Sea,West Antarctica |
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Authors: | Doo Byoul Lee Keun Hyung Choi Jae Seong Lee SangHoon Lee Chul Park |
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Institution: | 1. Division of Polar Ocean Environment, Korea Polar Research Institute, Incheon, Korea;2. Ballast Water Center, Korea Institute of Ocean Science and Technology, Geoje, Korea;3. Oceanographic Measurement and Instrument Calibration Service Center, Korea Institute of Ocean Science and Technology, Ansan, Korea;4. Department of Oceanography and Ocean Environmental Sciences, Chungnam National University, Daejeon, Korea |
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Abstract: | The individual respiration rates of five biomass-dominant copepods (Calanoides acutus, Rhincalanus gigas, Metridia gerlachei, Calanus propinquus and Paraeuchaeta antarctica), and Euphausia crystallorophias furcilia, from the Amundsen Sea, West Antarctica, were determined using a Clark-type oxygen microsensor affording high temporal resolution. Measurements were conducted on specimens collected from waters exhibiting a very narrow temperature range (?1.68 to ?1.32 °C), at sites located between 71 and 75°S, during the summer (31 January–20 March 2012). A short incubation time (3 h) was sufficient to reveal significant declines in dissolved oxygen concentrations by 12–45%. The respiration rates of the copepods and E. crystallorophias furcilia were within the ranges of previously reported values. The respiration rates of relatively large-bodied species were rather low, whereas the smaller species generally exhibited higher respiration rates. The data show that this simple microsensor technique is a useful high-resolution non-invasive means of investigating the metabolism of zooplankton in the Southern Ocean. The method could be used in other situations when such information is required. |
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Keywords: | respiration rate oxygen microsensor copepods Euphausia crystallorophias Amundsen Sea |
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