Browsing by Author "Glazer, J P"

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    A 2016 updated assessment of the squid resource, Loligo reynaudii
    (2016-10) Glazer, J P; Butterworth, Doug S
    The squid stock assessment model was last implemented in 2013 and at that time included data to 2012. An additional 3 years of data are now available and these have been included in an updated assessment. Sensitivity to incorporating additional survey data as well as a revised trawl catch series has been investigated. A Bayesian analysis has also been conducted and projections 10 years into the future suggest that effort in this fishery be maintained at 250 000 man-days.
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    An updated assessment of the Agulhas sole resource, Austroglossus pectoralis
    (2016-09) Butterworth, Doug S; Glazer, J P; Fairweather, T P; Durholtz, M D
    This analysis updates that of Butterworth and Glazer (2014), which considered two hypotheses of decreasing catchability and of decreasing productivity to account for a recent large drop in CPUE. Two further years of data reflect some increase in CPUE. For the most pessimistic scenario (a decrease in productivity, which remains at its current reduced level into the future), projections are somewhat more positive than previously, with recent biomasses estimated higher and projected to decrease more slowly if the 2013 effort level is maintained.