Biology of angel sharks (Squatina sp.) and sawsharks (Pristiophorus sp.) caught in south-eastern Australian trawl fisheries and the New South Wales shark-meshing (bather-protection) program

V. Raoult*, V. Peddemors, J. E. Williamson

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    Two species of angel shark (Squatina australis, S. albipunctata) and two species of sawshark (Pristiophorus nudipinnis, P. cirratus) are frequently caught in south-eastern Australia. Little is known of the biology of these elasmobranchs, despite being caught as secondary target species in large numbers. The present study collected morphometric and reproductive data from sharks caught in shark-control nets, commercial fishing trawlers and research trawlers in south-eastern Australia. All four species had female-biased sexual size dimorphism, but growth curves between sexes did not differ. Male S. australis individuals were fully mature at similar to 800-mm total length, male P. nudipinnis at similar to 900mm, and male P. cirratus at similar to 800mm. Anterior pectoral margins could be used to determine total length in all species. No morphometric measurement could reliably separate Squatina spp. or Pristiophorus spp., although S. albipunctata over 1000-mm total length had larger eyes than did S. australis.

    Original languageEnglish
    Pages (from-to)207-212
    Number of pages6
    JournalMarine and Freshwater Research
    Volume68
    Issue number2
    DOIs
    Publication statusPublished - 2017

    Keywords

    • elasmobranchs
    • management
    • reproductive biology
    • ATLANTIC
    • CONSERVATION
    • GROWTH
    • REPRODUCTION
    • PARAMETERS
    • SENEGAL
    • DUMERIL

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