TY - JOUR
T1 - Integrating size-structured assessment and bioeconomic management advice in Australia's northern prawn fishery
AU - Punt, André E.
AU - Deng, Roy A.
AU - Dichmont, Catherine M.
AU - Kompas, Tom
AU - Venables, William N.
AU - Zhou, Shijie
AU - Pascoe, Sean
AU - Hutton, Trevor
AU - Kenyon, Rob
AU - Van Der Velde, Tonya
AU - Kienzle, Marco
PY - 2010/11
Y1 - 2010/11
N2 - Three species in Australia's northern prawn fishery (Penaeus semisulcatus, P. esculentus, and Metapenaeus endeavouri) are assessed using a size-structured population model that operates on a weekly time-step. The parameters of this multispecies population model are estimated using data on catches, catch rates, length frequency data from surveys and the fishery, and tag release-recapture data. The model allows for the technical interaction among the three species. The results from the multispecies stock assessment are used to calculate the time-series of catches and levels of fishing effort that maximize net present value. The bioeconomic model takes into account costs which are proportional to catches and those which are proportional to fishing effort, as well as fixed costs. The sensitivity of the results is examined by changing the assumptions regarding the values for the economic parameters of the bioeconomic model as well as those on which the assessment are based. The results suggest that fishing effort needs to be reduced in the short term to achieve economic goals, although most stocks are estimated currently to be above the stock size corresponding to maximum sustainable yield. Short-term catches and effort levels are sensitive to model assumptions, and in particular, to trends in prices and costs.
AB - Three species in Australia's northern prawn fishery (Penaeus semisulcatus, P. esculentus, and Metapenaeus endeavouri) are assessed using a size-structured population model that operates on a weekly time-step. The parameters of this multispecies population model are estimated using data on catches, catch rates, length frequency data from surveys and the fishery, and tag release-recapture data. The model allows for the technical interaction among the three species. The results from the multispecies stock assessment are used to calculate the time-series of catches and levels of fishing effort that maximize net present value. The bioeconomic model takes into account costs which are proportional to catches and those which are proportional to fishing effort, as well as fixed costs. The sensitivity of the results is examined by changing the assumptions regarding the values for the economic parameters of the bioeconomic model as well as those on which the assessment are based. The results suggest that fishing effort needs to be reduced in the short term to achieve economic goals, although most stocks are estimated currently to be above the stock size corresponding to maximum sustainable yield. Short-term catches and effort levels are sensitive to model assumptions, and in particular, to trends in prices and costs.
KW - Australia
KW - bioeconomic assessment
KW - prawns
KW - size structure
KW - stock assessment
KW - technological interactions
UR - http://www.scopus.com/inward/record.url?scp=77958185707&partnerID=8YFLogxK
U2 - 10.1093/icesjms/fsq037
DO - 10.1093/icesjms/fsq037
M3 - Article
SN - 1054-3139
VL - 67
SP - 1785
EP - 1801
JO - ICES Journal of Marine Science
JF - ICES Journal of Marine Science
IS - 8
ER -