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Identification of essential habitats: including chimaeras into current shark protected areas

Citation

Barnett, A and McAllister, JD and Semmens, J and Abrantes, K and Sheaves, M and Awruch, C, Identification of essential habitats: including chimaeras into current shark protected areas, Aquatic Conservation pp. 1-16. ISSN 1052-7613 (2019) [Refereed Article]


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DOI: doi:10.1002/aqc.3087

Abstract

  • Essential habitats are areas required to support specific functions, such as providing foraging grounds, shelter or used for reproductive purposes. For mobile aquatic species that move throughout numerous components of the seascape, identifying essential habitats within a species' broader distribution range is crucial to understanding their ecology and provide vital information needed to underpin effective conservation and management (e.g. the implementation of protected areas).
  • In Tasmania (Australia), a number of coastal habitats have been declared shark refuge areas (SRAs), where fishing for elasmobranchs (sharks, rays and skates) is prohibited.
  • Chimaeras are relatives of elasmobranchs (class Chondrichthyes) and share traits that predispose many elasmobranch species to be vulnerable to overfishing (e.g. slow growth rates and low reproductive output). However, fishing for elephantfish Callorhinchus milii (the chimaera species found in coastal Tasmania) is still permitted in SRAs.
  • Here, a combination of acoustic tracking, catch data and reproductive information was used to determine the significance of the SRA coastal habitats for C. milii.
  • Results suggest that these areas are essential habitats for reproduction and likely important for other purposes, such as foraging.
  • Given that a key strategy in managing fish stocks is protecting areas important for reproduction, and the importance of these coastal areas of Tasmania for C. milii reproductive purposes, we recommend including C. milii in current SRAs, and decreeing these areas as chondrichthyan refuge areas.
  • Item Details

    Item Type:Refereed Article
    Keywords:acoustic tracking, essential fish habitat, fisheries, habitat use, protected areas, reproduction, spatial ecology
    Research Division:Agricultural and Veterinary Sciences
    Research Group:Fisheries Sciences
    Research Field:Fisheries Management
    Objective Division:Animal Production and Animal Primary Products
    Objective Group:Fisheries - Wild Caught
    Objective Field:Fisheries - Recreational
    UTAS Author:McAllister, JD (Mr Jaime McAllister)
    UTAS Author:Semmens, J (Associate Professor Jayson Semmens)
    UTAS Author:Awruch, C (Dr Cynthia Awruch)
    ID Code:132402
    Year Published:2019
    Web of Science® Times Cited:1
    Deposited By:Sustainable Marine Research Collaboration
    Deposited On:2019-05-06
    Last Modified:2019-05-21
    Downloads:0

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