Download FAR 2016/10 Species composition and seasonal variability in commercial purse-seine catches of jack mackerel (Trachurus declivis, T. murphyi, and T. novaezelandiae) in JMA 1 between January 2011 and September 2013

Purse-seine landings from JMA 1 were dominated by T. novaezelandiae, mainly in the Bay of Plenty. Although sampling was considered to be distributed in reasonable proportion to, and representative of, the JMA 1 purse-seine fishery operation, the catch is not representative of the population. There was evidence of spatial and temporal heterogeneity in size and abundance for each of the three species.