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Discovering behaviours in captive Port Jackson sharks (Heterodontus portusjacksoni) using accelerometers

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thesis
posted on 28.03.2022, 09:58 by Julianna Kadar
Uncovering how animals utilise their time in the wild is vital to understanding their ecology. Continuous observation in a marine environment is not feasible, but telemetry devices provide an opportunity for fine-scale analysis of movement and behaviour. We used accelerometers to investigate activity patterns and behaviours of the Port Jackson shark (Heterodontus portusjacksoni) with the aim of building a model from captive sharks that can be applied to wild populations. We developed techniques to identify behaviours from two types of accelerometers - high and low resolution. To validate the accelerometer data, we identified shark behaviours from multi-angle, high definition video that was time-matched to both types of accelerometer data. The low-resolution accelerometer (Vemco V13AP) was used to identify diel patterns and migratory restlessness in captive sharks. Wild shark diel patterns and presence data were used as a comparative measure to validate findings. The high-resolution accelerometer (Cefas G6a+) tested the application of a classification tree method in classifying four behaviours: resting, swimming, vertical swimming against the wall of the enclosure and chewing on prey. Through evaluating the ability of two types of accelerometers to identify captive shark behaviour, we are validating methods for long-term (low resolution - looking for trends) and short-term (high resolution- detailed behaviours) observation of wild shark populations.

History

Notes

Thesis by publication. Bibliography: pages 55-62

Awarding Institution

Macquarie University

Degree Type

Thesis MRes

Degree

MRes, Macquarie University, Faculty of Science and Engineering, Department of Biological Sciences

Department, Centre or School

Department of Biological Sciences

Year of Award

2017

Principal Supervisor

Culum Brown

Rights

Copyright Julianna Kadar 2016. Copyright disclaimer: http://mq.edu.au/library/copyright

Language

English

Jurisdiction

New South Wales

Extent

1 online resource (67 pages) colour illustrations, maps

Former Identifiers

mq:71276 http://hdl.handle.net/1959.14/1272646