Deployment, Tracking, and Data Management: Technology and Science for a Global Ocean Tracking Network

Gazit, Tsafrir; Apostle, Richard; Branton, Robert M.

doi:10.1080/13880292.2013.805058

Cited by 10 publications

(6 citation statements)

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“…The disadvantage, when this approach is used to track anadromous species migrating into marine systems, is that the financial and logistical costs of maintaining suitably positioned receivers increases exponentially with distance from the river from which individuals are being tracked. Collaboration amongst global and regional projects, often with differing primary aims, allow for fish migration information in the spatially extensive marine environments to be obtained in a more cost-effective way [21,22].…”

Section: Introductionmentioning

confidence: 99%

Evidence of long-distance coastal sea migration of Atlantic salmon, Salmo salar, smolts from northwest England (River Derwent)

et al. 2022

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Background Combining data from multiple acoustic telemetry studies has revealed that west coast England Atlantic salmon (Salmo salar L.) smolts used a northward migration pathway through the Irish Sea to reach their feeding grounds. Hundred Atlantic salmon smolts were captured and tagged in May 2020 in the River Derwent, northwest England as part of an Environment Agency/Natural England funded project. Results Three tagged smolts were detected on marine acoustic receivers distributed across two separate arrays from different projects in the Irish Sea. One fish had migrated approximately 262 km in 10 days from the river mouth at Workington Harbour, Cumbria to the northernmost receiver array operated by the SeaMonitor project; this is the longest tracked marine migration of an Atlantic salmon smolt migrating from the United Kingdom. This migrating fish displayed behaviours which resulted in fast northward migration. The remaining two fish were detected on a receiver array operated by a third project: the Collaborative Oceanography and Monitoring for Protected Areas and Species (COMPASS). Conclusion These detections further provide evidence that migration to reach marine feeding grounds of at least a proportion of salmon smolts from rivers draining into the Irish Sea is northerly, though without a southern marine array it is impossible to conclude that this is the only route. The pattern of these detections would not have been possible without the collaborative efforts of three distinct and separately funded projects to share data. Further work is required to fully understand migration trajectories in this species on the west coast of the British Isles.

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Section: Introductionmentioning

confidence: 99%

Evidence of long-distance coastal sea migration of Atlantic salmon, Salmo salar, smolts from northwest England (River Derwent)

et al. 2022

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“…The detection of the animal's tag emissions using a single receiver is sufficient for collecting indications of presence/absence of an animal in an area of interest [8], [9]. However, in the case of fixed receivers, receptions of a tag's emissions by at least three receivers is required to localize the animal in a twodimensional (2D) plane with no ambiguities.…”

Section: Introductionmentioning

confidence: 99%

Design of an Optimal Testbed for Tracking of Tagged Marine Megafauna

Alexandri,

Diamant

2022

Preprint

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Underwater acoustic technologies are a key component for exploring the behavior of marine megafauna such as sea turtles, sharks, and seals. The animals are marked with acoustic devices (tags) that periodically emit signals encoding the device's ID along with sensor data such as depth, temperature, or the dominant acceleration axis -data that is collected by a network of deployed receivers. In this work, we aim to optimize the locations of receivers for best tracking of acoustically tagged marine megafauna. The outcomes of such tracking allows the evaluation of the animals' motion patterns, their hours of activity, and their social interactions. In particular, we focus on how to determine the receivers' deployment positions to maximize the coverage area in which the tagged animals can be tracked. For example, an overly-condensed deployment may not allow accurate tracking, whereas a sparse one, may lead to a small coverage area due to too few detections. We formalize the question of where to best deploy the receivers as a non-convex constraint optimization problem that takes into account the local environment and the specifications of the tags, and offer a sub-optimal, low-complexity solution that can be applied to large testbeds. Numerical investigation for three stimulated sea environments shows that our proposed method is able to increase the localization coverage area by 30%, and results from a test case experiment demonstrate similar performance in a real sea environment. We share the implementation of our work to help researchers set up their own acoustic observatory.

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“…12 There are few OTN funded limited and redacted datasets, most includes deployment location, detections, and time with no additional data such as depth, salinity, temperature, and other recorded data or any supporting documents for these datasets. 13 For more details, see Gazit et al (2013a). 14 The OTN held an annual symposium from 2010 to 2014.…”

Section: Endnotesmentioning

confidence: 99%

Ocean tracking technologies: observing species at risk

Apostle

Gazit

2016

Maritime Studies

Self Cite

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The Ocean Tracking Network is a major global project to establish tracking of endangered fish and marine mammal species through acoustic telemetry. The project has only begun to generate the policy-related outcomes that may be utilized as benchmarks for evaluating the success of the project. We propose that projects like this one make technical advances before scientific ones, and that scientific advances may be quite long term. Further, the development of policy outcomes is shaped by the larger political economies in which the technologies are located; scientists are quite used to "flying under the radar", waiting for more propitious circumstances. There are serious questions regarding which actors are capable of making matters of fact issues of public debate.

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Deployment, Tracking, and Data Management: Technology and Science for a Global Ocean Tracking Network

Cited by 10 publications

References 0 publications

Evidence of long-distance coastal sea migration of Atlantic salmon, Salmo salar, smolts from northwest England (River Derwent)

Evidence of long-distance coastal sea migration of Atlantic salmon, Salmo salar, smolts from northwest England (River Derwent)

Design of an Optimal Testbed for Tracking of Tagged Marine Megafauna

Ocean tracking technologies: observing species at risk

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