Identifying Metiers Using Landings Profiles: An Octopus-Driven Multi-Gear Coastal Fleet

The multi-gear coastal vessels in the Algarve (South Portugal) own licenses for various fishing gears. However, it is generally uncertain what gears they use, which is problematic as each individual gear is responsible for unique impacts on the resources and the environment. In this study, landing profiles identified for the multi-gear coastal fleet (2012-2016) were used as support in defining potential metiers using k-mean clustering analysis (CLARA) along with information from past studies on metiers. The results showed that more than 50% of the vessels were engaged in the octopus fishery year-round, using traps, while a small percentage (similar to 13%) were entirely dedicated to clam dredging. In general, gillnets (21%) were used to target monkfish, hake and bastard soles, while trammel nets (6%) were used to target cuttlefish, with some vessels alternating the fishing gears (either seasonally or annually) according to target species. The method for the initial characterization of this fleet's metiers and its efficiency with limited data is discussed, as well as the utility of this segmentation in support of management advice.