Of the three jack mackerel species taken in JMA 7, recent information on stock status is only
available for
T. declivis. The current TACC is approximately 50% greater than the historical MCYbasedT. declivis and T. novaezelandiae combined. These estimates of yield do notT. murphyi which comprise an important part of the catches from JMA 7 in some years.T. declivis did not indicate sustainability concerns with this0, so the stock is probably above BMSY. The historical estimate of B0 (see MCY section) isT. novaezelandiae and T. murphyi in JMA 7 is not known, nor is the sustainability ofT. declivis) are sustainable at this time.
yield estimates for
include
The 2007 preliminary assessment for
component of JMA 7 at that time though there are uncertainties in the assessment relating to the catch
histories and abundance indices. The preliminary stock assessment indicates that current biomass is
53% of B
similar to that from the 2007 assessment.
The status of
current removals of these species.
Overall it cannot be determined if the TAC or current removals are sustainable for JMA 7, but it is
likely that the removals from one component of the fishery (
Given increased catches in recent years continued monitoring of the catch composition is strongly
recommended as is further work on potential abundance indices.
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