28 documents found, page 1 of 3
Multidisciplinary estimates of connectivity and population structure suggest th...
Abecasis, David; Ogden, R.; Winkler, Alexander; Gandra, Miguel; Khallahi, B.; Diallo, M.; Cabrera-Castro, R.; Weiller, Y.; Erzini, Karim; Afonso, P.Information on population structure and connectivity of targeted species is key for proper implementation of spatial conservation measures. We used a combination of genomics, biophysical modelling, and biotelemetry to infer the population structure and connectivity of Atlantic meagre, an important fisheries resource throughout its distribution. Genetic samples from previously identified Atlantic spawning locati...
Biophysical modelling and graph theory identify key connectivity hubs in the Me...
Abecasis, David; Fragkopoulou, Eliza; Claro, Bruno; Assis, JorgeConnectivity plays a key role in the effectiveness of MPA networks ensuring metapopulation resilience through gene flow and recruitment effect. Yet, despite its recognized importance for proper MPA network functioning, connectivity is not often assessed and is very seldomly used in marine spatial planning. Here, we combined biophysical modelling with graph theory to identify Mediterranean marine reserves that s...
Residency and space use estimation methods based on passive acoustic telemetry ...
Kraft, Sebastian; Gandra, Miguel; Lennox, R. J.; Mourier, J.; Winkler, Alexander; Abecasis, DavidAcoustic telemetry has helped overcome many of the challenges faced when studying the movement ecology of aquatic species, allowing to obtain unprecedented amounts of data. This has made it into one of the most widely used methods nowadays. Many ways to analyse acoustic telemetry data have been made available and deciding on how to analyse the data requires considering the type of research objectives, relevant ...
Depth and temperature preferences of meagre, argyrosomus regius, as revealed by...
Winkler, Alexander; Astrid Bovim, Lily; Macena, Bruno C. L.; Gandra, Miguel; Erzini, Karim; Afonso, Pedro; Abecasis, DavidArgyrosomus regius (commonly referred to as meagre), is one of Europe's largest coastal bony fish species and supports important recreational and commercial fisheries in the Atlantic and Mediterranean coasts. Demand for this species, and more recently for their swim bladders, has led to regional population declines and growing importance as an aquaculture species. Despite intense research in captivity, little i...
Small coastal marine protected areas offer recurring, seasonal protection to th...
Kraft, Sebastian; Winkler, Alexander; Abecasis, DavidMarine protected areas (MPAs) are a crucial tool in safeguarding marine biodiversity. However, elasmobranchs are often not the primary protection target of MPAs, and their contribution to protect these species remains to be better understood. In this study we examine the movement patterns of common stingrays in the Professor Luiz Saldanha marine park, a Portuguese temperate coastal MPA. Using acoustic telemetry...
Movement ecology of the white seabream Diplodus sargus across its life cycle: a...
Giacalone, Vincenzo Maximiliano; Pipitone, Carlo; Abecasis, David; Badalamenti, Fabio; D’Anna, GiovanniThe white seabream Diplodus sargus (L., 1758) (Osteichthyes, Sparidae) is a littoral species living mainly in rocky habitats and distributed in the eastern Atlantic and the Mediterranean. This species is targeted by artisanal and recreational fisheries and presents a high commercial importance. Although classified by IUCN as a "least concern" species, it has been the object of marine ranching and restocking ini...
Toward a decade of ocean science for sustainable development through acoustic a...
Alós, Josep; Aarestrup, Kim; Abecasis, David; Afonso, Pedro; Alonso‐Fernandez, Alexandre; Aspillaga, Eneko; Barcelo‐Serra, Margarida; Bolland, JonathanThe ocean is a key component of the Earth's dynamics, providing a great variety of ecosystem services to humans. Yet, human activities are globally changing its structure and major components, including marine biodiversity. In this context, the United Nations has proclaimed a Decade of Ocean Science for Sustainable Development to tackle the scientific challenges necessary for a sustainable use of the ocean by m...
Acoustic telemetry and accelerometers: a field comparison of different proxies ...
Pereñíguez, J. M.; Venerus, L. A.; Gutiérrez-Cánovas, C.; Abecasis, David; Ciancio, J. E.; Jiménez-Montalbán, P.; García-Charton, J. A.Different proxies for activity are used in the field of acoustic telemetry, a leading technology for the study of behaviour in the aquatic environment. Acoustic telemetry poses some shortcomings that may condition data interpretation. Here, we assessed some approaches commonly used to infer activity from acoustic telemetry data using acceleration biologgers as a benchmark. Specifically, we assessed (1) the perf...
Weak biodiversity connectivity in the European network of no-take marine protec...
Assis, J.; Fragkopoulou, Eliza; Serrão, Ester A.; e Costa, Horta; Gandra, Miguel; Abecasis, DavidThe need for international cooperation in marine resource management and conservation has been reflected in the increasing number of agreements aiming for effective and well-connected networks of Marine Protected Areas (MPAs). However, the extent to which individual MPAs are connected remains mostly unknown. Here, we use a biophysical model tuned with empirical data on species dispersal ecology to predict conne...
Reserve effect of a small North-East Atlantic marine protected area (Arrabida, ...
Martínez Ramírez, Lucas; Priester, Carl Robert; Sousa, Inês; Erzini, Karim; Abecasis, DavidThe implementation of marine protected areas (MPAs) has been widely used as a tool to manage and conserve marine resources and services. Yet, to date, the reserve effect is still weakly evaluated, particularly for soft-sediment habitats. The Arrabida MPA, considered as a biodiversity hotspot, was fully established in 2009 on the west coast of Portugal and is characterized by large expanses of soft-sediment habi...