Data Trawler - Survey Details

SS 03/99 (alternative identifier: SS199903)

Period: 1999-07-16 00:00 to 1999-08-02 00:00 UTC

Duration: 17.00 days

From: Hobart To: Hobart

Region: Tasman Sea; Waters off Tasmania's east coast.

Ship: Southern Surveyor [details]

Description: This information was taken from the Cruise Plan
Biomass of the orange roughy and study of its deep-water seamount habitat off the east coast of Tasmania.
The orange roughy fishery remains the most valuable component of the South-East Fishery (SEF, and the validity of the current estimates of stock status need to be clarified
Cruise Objectives
1.To assess the biomass of orange roughy based on acoustic surveys on the Eastern Zone fishing grounds (St Helens and St Patricks) during the spawning period using industry vessel acoustics over an extended 4 week period and the CSIRO acoustic package during the anticipated peak spawning period.
2.To compare the sensitivity and precision of acoustic surveys using scientific vessel-mounted and towed-body acoustics and industry vessel-mounted acoustics at various frequencies.
3.To further develop the acoustic method by improving the multi-frequency technique for species identification: sound absorption coefficient and in-situ target strengths.
4.Map significant deep-water seabed habitats using the towed deep-water video camera and towed acoustic system and further develop the technique with experiments in shallow water.
5.Identify the composition of distinct bio-acoustic scattering layers with underway multi-frequency acoustic data and target sampling with a pelagic trawl capable of depth stratified sampling.
6.To conduct a preliminary survey of the orange roughy on the South Tasman Rise spawning hill.

Leader: R. Kloser (CSIRO)

Project: Orange Roughy Assessment 1997-1999 [details]

Marlin Metadata:-

Acoustic Voyage Log Books [details]

Southern Surveyor Voyage SS 03/99 RAW ADCP Data [details]

Southern Surveyor Voyage SS 03/99 RAW CTD Data [details]

Southern Surveyor Voyage SS 03/99 RAW Underway Data [details]

Southern Surveyor Voyage SS 03/99 St Helens Hill Orange Roughy Acoustic Survey 1999 [details]

Metadata from OBIS Australia datasets:- biological data is published via the OBIS-AU IPT server and delivered to one or more of OBIS, ALA and GBIF

Participants - on ship:-

This list includes those that may have only been on part of the voyage. See voyage reports on 'Reports and Maps' tab for details.

Marine National Facility Reports - plans, summaries and data processing

• SS199903 Voyage Summary - includes preliminary results, voyage narrative, types of data collected with C77/ROSCOP codes.

• SS199903 Voyage Plan - includes objectives, investigator details, proposed data collection, voyage track and equipment to be used.

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Publications, reports and datasets from this voyage.

Data publishing

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