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

V Raoult, V Peddemors… - Marine and Freshwater …, 2016 - CSIRO Publishing
Marine and Freshwater Research, 2016CSIRO Publishing
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 …
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 ~800-mm total length, male P. nudipinnis at ~900mm, and male P. cirratus at ~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.
CSIRO Publishing
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