Ocean Floor Observation and Bathymetry System (OFOBS) images of Neopagetopsis ionah ice fish nest arrays in the Filchner Trough, Antarctica collected during the PS124 Polarstern expedition ...

• Main Authors: Purser, Autun, Boehringer, Lilian, Hehemann, Laura, Wenzhöfer, Frank
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2021
• Subjects: Antarctica; Benthic; Benthic community structure; Filchner Trough; ice fish; Neopagetopsis ionah; Weddell; Weddell Sea; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.932827; https://doi.pangaea.de/10.1594/PANGAEA.932827

During the RV POLARSTERN expedition PS124 to the Weddell Sea during Jan - April 2021 the Ocean Floor Observation and Bathymetry System (OFOBS) was used to collect still and video images, as well as sidescan data, from various locations surveyed during the research cruise.During the cruise the first extensive site of Neopagetopsis ionah nesting was discovered. This data set contains images from 4 OFOBS deployments, conducted at 1.5 and 3.5 m flight heights, and 0.5 and 1.5 knots. In the full data set, more than 12000 active fish nests are apparent.The OFOBS system consisted of a towed underwater camera system equipped with both a high-resolution photo-camera (iSiTEC, CANON EOS 5D Mark III) and a high-definition video-camera (iSiTEC, Sony FCB-H11) as well as an integrated sidescan sonar system. The cameras were mounted on a steel frame (140L x 92W x 135H cm), together with two strobe lights (iSiTEC UW-Blitz 250, TTL driven), three laser pointers spaced with a distance of 50 cm used to estimate the size of ...