Encontrados 24 documentos, a visualizar página 1 de 3
Black scabbardfish (Aphanopus carbo) longline fishery off the Portuguese contin...
Campos, Aida; Leitão, Pedro; Sousa, Luís; Henriques, VictorThe main objective of this study is to provide, for the first time, fisheries-dependent, spatially explicit information on the activity for the black scabbard fish (Aphanopus carbo) longline fleet operating off the Portuguese coast. Fisheries monitoring data were analysed, covering the period 2014-2016, aiming at identifying deep-sea fishing grounds, gaining a better understanding of the fleet spatial dynamics,...
Predicting gear used in a multi-gear coastal fleet
Leitão, Pedro; Campos, Aida; Castro, MargaridaKnowledge of the gear used in multi-gear fisheries is crucial for supporting fisheries management. Still, the high complexity and lack of data in the Portuguese multi-gear coastal fleet compromise this task. The present study developed a method to predict main fishing gear used in each fishing trip for the Portuguese multi-gear coastal fleet based on landing records (species caught, port, and month of landing)....
Reducing invertebrate by-catch in a coastal fishery using a raised monofilament...
Szynaka, Monika Jadwiga; Monteiro, Pedro; Erzini, Karim; Gonçalves, Jorge Manuel Santos; Campos, AidaTrammel nets are one of the least selective fishing gears and are known to catch a variety of species, many of which are discarded, including important invertebrates that are considered habitat-forming species. Although there are few studies focusing on this type of by-catch, these habitat-forming species include corals and sponges that are vulnerable to disturbances from fishing activities using bottom contact...
Reducing invertebrate by-catch in a coastal fishery using a raised monofilament...
Monika Jadwiga Szynaka; Pedro Monteiro; Karim Erzini; Jorge M.S. Gonçalves; Aida Campos; Szynaka, Monika Jadwiga; Monteiro, Pedro; Erzini, KarimTrammel nets are one of the least selective fishing gears and are known to catch a variety of species, many of which are discarded, including important invertebrates that are considered habitat-forming species. Although there are few studies focusing on this type of by-catch, these habitat-forming species include corals and sponges that are vulnerable to disturbances from fishing activities using bottom contact...
Spatial patterns of fishing activity inside the Gorringe bank MPA based on VMS,...
Campos, Aida; Leitão, Pedro; Sousa, Luís; Gaspar, Patrícia; Henriques, VictorIn this study, the fishing distribution and intensity over the Gorringe bank, a large oceanic underwater mountain located in the NE Atlantic, Natura 2000 Network MPA inside Portugal's EEZ is evaluated in the period from 2012 to 2016. Based on the combined analysis of fisheries-dependent data comprising Vessel Monitoring System (VMS), Automatic Identification System (AIS) and electronic logbooks available for th...
Fishers, let us talk: validating métiers in a multi-gear coastal fishing fleet
Szynaka, Monika; Fernandes, Mariana; Anjos, Mariana; Erzini, Karim; Gonçalves, Jorge Manuel Santos; Campos, AidaIn the multi-gear coastal fleet in the Algarve (South Portugal), fishers own licenses for various fishing gears. However, they generally do not use all these licenses, and therefore, it is difficult to estimate the impacts this fleet has on the local environment. In this study, two types of questionnaires were used directed to the local fishers from the multi-gear fleet during interviews carried out between Nov...
Identifying métiers using landings profiles: an octopus-driven multi-gear coast...
Szynaka, Monika; Erzini, Karim; Gonçalves, Jorge Manuel Santos; Campos, AidaThe 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 métiers...
The MINOUWApp: a web-based tool in support of by-catch and discards management
D’Andrea, Lorenzo; Campos, Aida; Erzini, Karim; Fonseca, Paulo; Franceschini, Simone; Kavadas, Stefanos; Maina, Irida; Maynou, Francesc; Russo, TommasoCurrent fishing practices often do not allow adequate selection of species or sizes of fish, resulting in unwanted catches, subsequently discarded, with the consequent negative effects on both marine communities and fisheries profitability. The cross-analysis of density patches of potential unwanted catches and distribution of fishing effort can support the identification of spatial-temporal hot-spots in which ...
AUMENTO DA EFICIÊNCIA ENERGÉTICA EM ARRASTÕES COSTEIROS ATRAVÉS DA UTILIZAÇÃO D...
Parente, Joaquim; Fonseca, Paulo; Henriques, Victor; Campos, AidaTrawling is a fishing technique associated with an intensive consumption of fuel and, consequently, the profit margin of a commercial trawling vessel is very dependent on the variations in the price of diesel. The share of fuel in the total costs of Portuguese coastal trawlers may be as high as 40%. One way of reducing consumption is to decrease the overall drag resistance of the trawl by introducing changes to...
Further improvements in sorting grids for the crustacean trawl fishery off the ...
Millar, Russell B.; Barros, Luisa; Fonseca, Paulo; Santos, Paulo T.; Campos, AidaBottom-trawl fishing for crustaceans off the Portuguese south and southwest coasts is a very important segment of the Portuguese fishing fleet, where annual rates of discarding have ranged from approximately 38% to as much as 70% of the total catch. Past experiments to address this problem encompassed the testing of different codend mesh sizes and configurations, square mesh windows and rigid grids to enhance s...