REH200901: FV Rehua Tasman Sea Micronekton and Acoustic Data, June 2009

A five-day voyage from New Zealand to Tasmania in June 2009 collected biological and acoustic data from the Tasman Sea. Sampling involved a MIDOC net system deployed to 1000 meters, a 38 kHz echosounder logged for the entire transit, and an Acoustic-Optical System (AOS) deployed to 1000 meters. The data was collected by CSIRO Marine and Atmospheric Research during a 24-hour charter of the FV Rehua.

Use Cases

• Analyzing micronekton community structure based on stratified net tows from 1000 m to the surface.
• Mapping basin-wide acoustic reflectivity based on continuous 38 kHz echosounder data logged during the voyage.
• Correlating acoustic signatures with optical images of individual biota based on concurrent AOS recordings at 38 and 120 kHz.

Strengths

• Data collection includes three complementary instrument systems: net sampling, echosounding, and acoustic-optical imaging.
• Sampling was structured into eight three-hour deployments forming day/night experiments.
• Net tows were stratified into five 200-meter depth intervals from 1000 m to the surface.

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

Sampling from a commercial fishing vessel (FV Rehua) using MIDOC nets, a Simrad ES60 echosounder, and an Acoustic-Optical System (AOS).

Time Range

June 17-22, 2009

Freshness

Last updated 2026-06-05 06:06:49.101642; freshness should be verified.

Geography

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