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

A five-day voyage from Nelson, New Zealand to Devonport, Australia in June 2009 collected biological and acoustic data in the Tasman Sea. The FV Rehua, a 65-meter vessel chartered by CSIRO Marine and Atmospheric Research, conducted eight three-hour deployments over 24 hours. Sampling used a MIDOC net system, a 38 kHz echosounder, and an Acoustic-Optical System to capture micronekton and acoustic reflectivity from depths up to 1000 meters.

Use Cases

• Modeling micronekton vertical distribution based on stratified sampling from 1000m to the surface
• Mapping acoustic reflectivity of the Tasman Sea basin using logged 38 kHz echosounder data
• Analyzing the acoustic signatures of individual biota using dual-frequency (38 and 120 kHz) measurements from the AOS
• Correlating optical imagery with acoustic data for species identification or behavior studies

Strengths

• Data collection spanned a defined five-day transit with eight three-hour deployments, providing structured temporal sampling
• Sampling covered multiple depth strata up to 1000 meters using a fine-mesh MIDOC net system
• Integrated data from three instruments: nets, echosounder, and an Acoustic-Optical System

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

Scientific sampling from the FV Rehua using MIDOC nets, a 38 kHz Simrad ES60 echosounder, and an Acoustic-Optical System.

Time Range

June 17-22, 2009

Freshness

Last updated 2026-06-27 16:51:54.994892; freshness should be verified

Geography

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