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Effects of bycatch reduction devices in Queensland's (Australia) deepwater eastern king prawn (Melicertus plebejus) trawl fishery

Courtney, Anthony J., Campbell, Matthew J., Tonks, M. L., Roy, Darren P., Gaddes, S. W., Haddy, J. A., Kyne, Peter M., Mayer, David G. and Chilcott, K. E. (2014). Effects of bycatch reduction devices in Queensland's (Australia) deepwater eastern king prawn (Melicertus plebejus) trawl fishery. Fisheries Research,157(September):113-123.

Document type: Journal Article
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IRMA ID 84376995xPUB144
Title Effects of bycatch reduction devices in Queensland's (Australia) deepwater eastern king prawn (Melicertus plebejus) trawl fishery
Author Courtney, Anthony J.
Campbell, Matthew J.
Tonks, M. L.
Roy, Darren P.
Gaddes, S. W.
Haddy, J. A.
Kyne, Peter M.
Mayer, David G.
Chilcott, K. E.
Journal Name Fisheries Research
Publication Date 2014
Volume Number 157
Issue Number September
ISSN 0165-7836   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84899823256
Start Page 113
End Page 123
Total Pages 11
Place of Publication Netherlands
Publisher Elsevier BV
HERDC Category C1 - Journal Article (DIISR)
Abstract This paper quantifies the effects of a square mesh codend bycatch reduction device (BRD) and turtle excluder device (TED) in the deepwater eastern king prawn (Melicertus plebejus) fishery on the southeast Queensland coast, based upon on a 10-day research charter. The bycatch comprised 224 taxa, mainly gurnards, flatheads, sandpaper fish, hermit and charybdid crabs, mantis shrimps, sand dollars (i.e. sea urchins), dragonets, snipefish, carids and lizardfish. The total mean bycatch rate was comparatively low (1114.0 g ha−1 from the standard diamond mesh codend), mainly because of the relatively deep waters associated with the fishery. When the TED and square mesh codend BRD were used together the total mean bycatch rate was significantly reduced by 29% (796.0 g ha−1) compared to the standard codend, with no significant effect on the prawn catch rate or size frequency distribution. Several bycatch species experienced very large reductions in mean catch rate, due to the square mesh codend, including Graham's conger Gnathophis grahamii (98.2% reduction), dumpling squid Euprymna tasmanica (95.9%), shortsnout threadsail Aulopus curtirostris (90.6%) and sandpaper fish Aulotrachichthys sp. (90.0%). Multidimensional scaling indicated that bycatch assemblages were more affected by latitude and depth than codend type. Based on the results, we recommend that the 47.6 mm square mesh codend be made mandatory in the deepwater eastern king prawn fishery as a highly effective BRD.
Keywords Bycatch reduction device (BRD)
Turtle excluder device (TED)
Bycatch
Prawns
Melicertus plebejus
Eastern king prawn
Square mesh codend
DOI http://dx.doi.org/10.1016/j.fishres.2014.03.021   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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