REH200901: Tasman Sea Micronekton Acoustic and Net Sampling

Tasman Sea biological data was collected during a five-day transit from Nelson, New Zealand to Devonport, Australia in June 2009 aboard the FV Rehua. The dataset likely contains acoustic reflectivity profiles and biological samples of micronekton from depths up to 1000 meters, gathered using a MIDOC net system, a 38 kHz echosounder, and an Acoustic-Optical System. It supports analysis of pelagic community structure and acoustic backscatter across day-night cycles.

Use Cases

• Mapping acoustic backscatter along a transect based on the logged 38 kHz echosounder signal.
• Analyzing vertical distribution of micronekton based on stratified sampling from 1000 m to the surface.
• Correlating optical images with acoustic reflectivity of individual organisms from the Acoustic-Optical System deployments.
• Comparing day and night community composition from the three sets of day/night experiments.

Strengths

• Data collection employed three complementary instruments (MIDOC net, echosounder, Acoustic-Optical System) for multi-modal observation.
• Sampling design included three sets of day/night experiments and stratified tows across five 200-meter depth intervals.
• The voyage provides a continuous acoustic transect across the Tasman Sea basin.

Limitations

• Specific column names, row counts, and data formats are not provided in the available metadata.
• The dataset's license and author information are not specified.
• The temporal coverage is limited to a single five-day voyage in June 2009.

Provenance

Source

Australian Ocean Data Network; data collected by CSIRO Marine and Atmospheric Research from the FV Rehua.

Collection Method

Scientific sampling using a MIDOC net system fitted to commercial trawl nets, a vessel-mounted 38 kHz Simrad ES60 echosounder, and a deployed Acoustic-Optical System.

Time Range

June 17-22, 2009

Freshness

Metadata was last updated on 2026-05-04 according to one source.

Geography

Transit across the Tasman Sea from Nelson, New Zealand to Devonport, Tasmania, Australia.