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In total, 39 vessel trips were completed (~13 trips/vessel), resulting in 29 replicate sets. However, catch rates were low, which meant that statistical power was poor and it was difficult to compare individual sets by vessel or across vessels. Despite this, an apparent trend was observed (Figure below) with a significant difference (P<0.05):

  • Cod % landings were highest (~70%) and pollock % landings were lowest from the control net;
  • The highest % pollock landings and lowest % cod landings (~6%) were achieved by the 2 ft norsel height.

Figure: Relative catch composition by gillnet type.