REH200901: Biological and Acoustic Data from the Tasman Sea Transit

A 2009 voyage from Nelson, New Zealand to Devonport, Australia collected biological and acoustic data in the Tasman Sea. The dataset likely contains micronekton samples from stratified net deployments, acoustic reflectivity logs from a 38 kHz echosounder, and concurrent optical images from an Acoustic-Optical System. Data was gathered over five days in June 2009 by CSIRO Marine and Atmospheric Research using the FV Rehua vessel.

Use Cases

• Analyze micronekton community structure based on stratified net sampling from 1000m to the surface.
• Map acoustic reflectivity of the water column based on 38 kHz echosounder data logged along the transit.
• Correlate acoustic signatures with biological targets based on concurrent optical and dual-frequency acoustic measurements from the AOS.

Strengths

• Data collection involved three complementary instruments (MIDOC nets, echosounder, AOS) for multimodal observation.
• Sampling was structured into day/night experiments across eight deployments during a dedicated 24-hour charter.
• Acoustic data provides continuous transect coverage from the surface down to 1500 metres.

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 temporal and geographic bias inherent to a single five-day transit in June 2009.

Provenance

Source

Australian Ocean Data Network

Collection Method

Samples collected with MIDOC nets fitted to commercial trawl nets, acoustic logging from a vessel's 38 kHz Simrad ES60 echosounder, and deployments of an Acoustic-Optical System.

Time Range

June 17, 2009 to June 22, 2009

Freshness

Last updated 2026-04-21 14:57:56.903946; freshness should be verified.

Geography

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