Zooplankton monitoring using a twin NORPAC net during the 60th Japanese Antarctic Research Expedition in austral summer 2018-2019 ...

• Main Authors: Takahashi, Kunio, Odate, Tsuneo
• Format: Dataset
• Language: English
• Published: Arctic Data archive System (ADS), Japan 2020
• Subjects: BIOSPHERE>ECOSYSTEMS>AQUATIC ECOSYSTEMS>PLANKTON>ZOOPLANKTON; Antarctic; Southern Ocean; Austral; Pacific; Indian; Antarc*
• Online Access: https://dx.doi.org/10.17592/001.2019122402; https://ads.nipr.ac.jp/dataset/A20191224-002

As part of the monitoring program of the Japanese Antarctic Research Expedition (JARE), zooplankton sampling using a NORPAC (NORth PACific) standard net has been routinely carried out since JARE-14 (1972/73 season) to estimate the long-term trends of abundance, species composition and their temporal/spatial variation in the uppermost 150 m of the Indian Ocean sector of the Southern Ocean. Two separate monitoring surveys were completed during JARE-60 (December 2018 to March 2019). The icebreaker Shirase has a fixed schedule and route, travel down longitude 110E each December and return along 150E each March, making its voyages ideal for long-term monitoring work in this region. We present data from its 2018/2019 voyage. In additions, a transects by the T/V Umitaka-maru was also carried out along 110E longitude in January 2019. Thus, this report provides the latest zooplankton data, forming part of the long-term monitoring of zooplankton carried out by JARE in this region for the last 45 years. These transect ...