REH200901: FV Rehua Tasman Sea Biological and Acoustic Survey

A five-day voyage from New Zealand to Tasmania in June 2009 collected biological and acoustic data from the Tasman Sea. The charter involved eight three-hour deep-water deployments using a multiple opening closing net system (MIDOC), a 38 kHz echosounder, and an Acoustic-Optical System (AOS). Data was collected by CSIRO Marine and Atmospheric Research from a 65-meter factory freezer vessel, the FV Rehua.

Use Cases

• Analyze micronekton community structure based on stratified sampling from 1000 m to the surface.
• Map acoustic reflectivity along a transect based on logged 38 kHz echosounder data.
• Correlate acoustic signatures with optical images of individual biota based on concurrent AOS measurements.

Strengths

• Data collection involved three distinct, complementary instruments (MIDOC nets, echosounder, AOS).
• Sampling was stratified across five 200-metre depth intervals from 1000 m to the surface.
• The voyage provides a specific temporal snapshot from June 17-22, 2009.

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 transit.

Provenance

Source

Australian Ocean Data Network

Collection Method

Samples collected with MIDOC net fitted to commercial trawl nets, alongside acoustic and optical systems, during a vessel transit.

Time Range

June 17-22, 2009

Freshness

Last updated 2026-06-16 23:35:41.700338; freshness should be verified.

Geography

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