REH200901: FV Rehua Micronekton and Acoustic Survey of the Tasman Sea, June 2009

June 2009 biological and acoustic data collected during a five-day transit from Nelson, New Zealand to Devonport, Australia. The dataset was gathered by CSIRO Marine and Atmospheric Research using a MIDOC net system, a 38 kHz echosounder, and an Acoustic-Optical System attached to commercial trawl nets. It likely contains information on micronekton distribution and acoustic reflectivity from the surface down to 1500 meters depth.

Use Cases

• Analyze micronekton community structure based on stratified net sampling from 1000m to the surface.
• Map acoustic reflectivity and biomass distribution using the logged 38 kHz echosounder signal along the transit path.
• Correlate optical images with acoustic signatures of individual biota using data from the Acoustic-Optical System.
• Study diel vertical migration patterns based on the day/night experiment structure described.

Strengths

• Data collection involved three complementary instruments (MIDOC nets, echosounder, AOS) for multimodal observation.
• Sampling was structured into eight three-hour deployments forming day/night experiments.
• Acoustic data provides continuous coverage along the transit from New Zealand to Tasmania.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic and temporal bias inherent to a single five-day voyage in June 2009.

Provenance

Source

Australian Ocean Data Network

Collection Method

Samples collected with a MIDOC net fitted to commercial trawl nets, complemented by vessel echosounder logging and an Acoustic-Optical System.

Time Range

June 17-22, 2009

Freshness

Last updated 2026-04-28 15:37:03.073216; freshness should be verified.

Geography

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