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Space utilisation, movement and behaviour of the spiny dogfish, Squalus acanthias, in Macquarie Harbour, Tasmania

Citation

Moreno, D and Bell, JD and Lyle, JM and Semmens, JM, Space utilisation, movement and behaviour of the spiny dogfish, Squalus acanthias, in Macquarie Harbour, Tasmania, Program book for the Australian Society for Fish Biology - Oceania Chondrichthyan Society Joint Conference, 04-07 September, Hobart, Tasmania (2016) [Conference Extract]


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Abstract

Movement and spatial use provide insights into the behaviour of marine organisms which, in turn, enables their effective management. The spiny dogfish, Squalus acanthias, is a common, but vulnerable, shark inhabiting temperate continental shelves circumglobally, yet no information exists on the spatial dynamics of the species in Australia. Twenty-three S. acanthias were implanted with acoustic transmitters and monitored over 1.5 years using a passive acoustic array in Macquarie Harbour, Tasmania. Markov chains and Brownian bridge models were used to analyse the distribution of the species in the harbour. Both males and females displayed non-random site affinity, although the ranges of males changed seasonally. Social association indicated a varying degree of sexual segregation during winter, although patterns were not as clear as reported elsewhere. This represents the first example where the species displays phylopatric behaviour and does not undertake large scale movement. Both sexes are likely to be vulnerable to a variety of anthropogenic impacts within the Harbour and spatial management could be effectively implemented to nullify these impacts. The patterns of space use and behaviours observed in this study are unique for the species. By using random walk models and social networks, it is possible to gain a better understanding of the ways in which S. acanthias has adapted to a seemingly unfit environment.

Item Details

Item Type:Conference Extract
Keywords:spiny dogfish, movement. behaviour
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Sciences not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Moreno, D (Mr David Moreno)
Author:Bell, JD (Dr Justin Bell)
Author:Lyle, JM (Dr Jeremy Lyle)
Author:Semmens, JM (Associate Professor Jayson Semmens)
ID Code:119428
Year Published:2016
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-08-01
Last Modified:2017-08-02
Downloads:0

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