6 documents found, page 1 of 1
Demography of a deep-sea lantern shark (Etmopterus spinax) caught in trawl fish...
Coelho, R.; Alpizar-Jara, R.; Erzini, K.The deep-sea lantern shark Etmopterus spinax occurs in the northeast Atlantic on or near the bottoms of the outer continental shelves and slopes, and is regularly captured as bycatch in deep-water commercial fisheries. Given the lack of knowledge on the impacts of fisheries on this species, a demographic analysis using age-based Leslie matrices was carried out. Given the uncertainties in the mortality estimates a...
Eco-touristic snorkelling routes at Marinha beach (Algarve): environmental educ...
Rangel, M. O.; Pita, C. B.; Gonçalves, J. M. S.; Oliveira, F.; Costa, C.; Erzini, K.The use of natural areas for underwater coastal marine activities such as snorkelling is growing, but the amount of ecological and socioeconomic data on these activities is scarce and relates mainly to coral reef areas. Three underwater self-guided routes were designed at Marinha Beach (Algarve, Portugal), based on scientific information, with in situ interpretation and guidance, as a way to enhance biodiversit...
Assessment of catches, landings and fishing effort as useful tools for MPA mana...
Batista, Marisa Isabel; Horta e Costa, Bárbara; Gonçalves, L.; Henriques, M.; Erzini, K.; Caselle, J.E.; Gonçalves, Emanuel; Cabral, HenriqueMarine protected areas (MPAs) have been widely recognized as a tool to achieve both fisheries management and conservation goals. Simultaneously achieving these multiple goals is difficult due to conflicts between conservation (often long-term) and economic (often short-term) objectives. MPA implementation often includes additional control measures on fisheries (e.g. vessel size restrictions, gear exclusion, cat...
Developing self-guided scuba dive routes in the Algarve (Portugal) and analysin...
Rangel, M. O.; Pita, C. B.; Gonçalves, J. M. S.; Oliveira, F.; Costa, C.; Erzini, K.Scuba diving allows for underwater visitation of cultural and natural resources. Underwater routes can be used as a tool for guided and supervised underwater visits. Two scuba diving routes were implemented in the Algarve (South of Portugal), the "B24" and "Poço" diving sites. The perceptions of scuba divers regarding several aspects of the routes and the existing support infrastructures were studied following ...
Ecological quality assessment of transitional waters based on fish assemblages:...
Cabral, H.N.; Fonseca, V.F.; Gamito, R.; Gonçalves, C.I.; Costa, J.L.; Erzini, K.; Gonçalves, J.; Martins, J.; Leite, L.; Andrade, J.P.; Ramos, S.The assessment of water quality has changed markedly worldwide over the last years, especially in Europe due to the implementation of the Water Framework Directive. Fish was considered a key-element in this context and several fish-based multi-metric indices have been proposed. In this study, we propose a multimetric index, the Estuarine Fish Assessment Index (EFAI), developed for Portuguese estuaries, designed...
Behavioural responses of sardines Sardina pilchardus to simulated purse-seine c...
Marçalo, A.; Araújo, J.; Pousão-Ferreira, P.; Pierce, G. J.; Stratoudakis, Y.; Erzini, K.The behavioural effects of confinement of sardine Sardina pilchardus in a purse seine were evaluated through three laboratory experiments simulating the final stages of purse seining; the process of slipping (deliberately allowing fishes to escape) and subsequent exposure to potential predators. Effects of holding time (the time S. pilchardus were held or entangled in the simulation apparatus) and S. pilchardus...