Abstract
We propose that for the Mediterranean multispecies trawl fisheries, target species at a particular fishing ground can be objectively defined as the species contributing a percentage of Bray–Curtis similarity equal to that at which the different fishing operations form only one group in terms of both landings per day and value per day. Incidental catches (i.e., the landings of all non-target species) are also very important for the Mediterranean fisheries in terms of overall similarity, total landings per day and, to a lesser extent, total value per day.
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