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• W1592740155 abstract "The cod stock in NAFO division 3M is in fishing moratorium since 1999. Commercial catches have been very low since then, although they were noticeable in 2006. During the last few years a survey-based assessment method has been used to evaluate the stock status in a stochastic way. The method takes into account uncertainties in survey results as well as in catchability estimates. The present document updates the results of the assessment conducted in 2006 (details in Murua et al. 2006) incorporating the survey data from 2006. The results indicate a strong age 1 abundance value in 2006 and an increasing trend in spawning stock biomass (SSB) after its lowest value attained in 2003. Nevertheless, the probability that SSB is presently below Blim is still very high. The abundances at age 1 estimated for 2005 and 2006 are the highest since 1993. As a consequence, there is some expectation that the increasing SSB trend may continue during the next few years. INTRODUCTION This stock is in fishing moratorium since 1999 following its collapse, which has been attributed to three possible factors: a stock decline due to overfishing, an increase in catchability at low abundance levels and very poor recruitment levels since 1993. The assessments performed since the collapse of the stock confirmed the poor situation, with SSB at very low levels, well below Blim (Vazquez and Cervino, 2005). Nevertheless, SSB was estimated to have increased a bit in 2004 and 2005 (Murua et al., 2006). The new data from 2006 indicate another increase of SSB in 2006. Since 1974, when a TAC was established for the first time, estimated catches ranged from 48 000 tons in 1989 to a minimum value of 5 tons in 2004. Annual catches were about 30 000 tons in the late 1980’s (notwithstanding the fact that the fishery was under moratorium in 1988-1990) and diminished since then as a consequence of the stock decline. Since 1998 yearly catches have been less than 1 000 tons and from 2000 to 2005 they were under 100 tons, mainly attributed to by-catches from other fisheries. Estimated commercial catch in 2006 is 339 tons, which represents more than a ten-fold increase over the average yearly catch during the period 2000-2005. This increase could indicate some kind of directed fishery, which would be quite detrimental for stock recovery. Historical catches are shown in Table 1, where the decline of the fishery can be clearly observed. A VPA based (XSA) assessment of the cod stock in Flemish Cap was approved in 1999 for the first time and it was annually updated until 2002. However, most recent catches were very small, under 100 tons, undermining the VPA based assessment as the results of VPA are based on catches and are quite sensitive to assumed natural mortality (M) values when catches are at low levels. The F estimates from the last XSA analysis were at the same level as M in" @default.
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• W1592740155 date "2004-01-01" @default.
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• W1592740155 title "A survey-based assessment of cod in Division 3M" @default.
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