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Acoustic systems are used widely to provide quantitative estimates of biomass for fisheries and ecosystem assessments. Traditionally, these systems are attached to surface vessels, but increasingly they are being fitted to remote operated vehicles, autonomous vehicles and towed platforms. These platforms allow the acoustic transducer to get closer to targets, and provide increased resolution and,...
The design of an existing in-house scientific instrument was used as a basis to create a new model suitable for deployment onto a fishing industry vessel, with a reduced need for specialized technical support. Some of the planned developmental goals were met directly, whilst others resulted in intermediate problems that required remedial action in order to deliver the desired outcome. The developmental...
The design of an existing in-house scientific instrument was used as a basis to create a new model suitable for deployment onto a fishing industry vessel, with a reduced need for specialized technical support. Some of the planned developmental goals were met directly, whilst others resulted in intermediate problems that required remedial action in order to deliver the desired outcome. The developmental...
At-sea operational time budgets for seabed (benthic) sampling programs in the deep ocean are strongly influenced by the long descent and ascent times of samplers. The aims of deep ocean programs often require different types of samples and data to be collected from single sites, and to be closely co-located in space and time. A point of leverage to minimise operational time budgets, and a means of...
Pinger tags have long been used as a method of tracking fish movements. Typically, tags are either fixed to fish manually using catch and release methods, or the fish are allowed to ingest the tags through the use of baited lines. In the study of tuna species, long lines fitted with pinger tags and bait provide researches with a fast and effective method of tagging targets. The fish are able to swallow...
Marine researchers aiming to acquire composition and size-frequency information on fish assesmblages have successfully used Baited Underwater Video Systems (BRUVS) as a non-extractive alternative to more traditional sampling methods using nets or traps. In a monitoring study of gulper shark populations on the eastern Australian upper continental slope (300–700 m depths), it was necessary to re-design...
The AOS system was developed through the merging of acoustic and optical technologies to further the quality of fisheries stock assessment. The system has been deployed from several ships (40 m to 75 m in length) over the past three years providing improved accuracy of acoustic target strength measures for commercial fish species and delivering biomass estimates of fish stocks. It has proven to be...
A combined benthic grab, acoustic and optical observation system for water column and seabed studies has been developed and deployed in waters off the East Australian Coast during 2009. The system was developed to inform the ecosystem-based spatial management approach being adopted for Australian deepwater environments. The Benthic Optical, Acoustic and Grab System (BOAGS) combines several observational...
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