37 documents found, page 1 of 4
Movement patterns of the invasive atlantic blue crab in a northeastern atlantic...
Encarnação, João Pedro da Silva; Morais, Pedro; Abecasis, David; Martínez Ramírez, Lucas; Barra, Melissa; Baptista, Vânia; Carere, ClaudioThe movement ecology of invasive species discloses critical information to estimate ecological impacts and inform management policies to control their spread. The Atlantic blue crab Callinectes sapidus Rathbun, 1896, has successfully invaded coastal and estuarine ecosystems in southern Europe, making it urgent to understand fundamental aspects of its ecology in the non-native range. Recent studies identified ke...
Revealing chronotypes across aquatic species using acoustic telemetry
Martorell‐Barceló, Martina; Abecasis, David; Akaarir, Mourad; Alonso‐Fernández, Alexandre; Arlinghaus, Robert; Aspillaga, EnekoAcoustic telemetry offers valuable opportunities to investigate individual variability in circadian-related and other behaviours and how environmental cues shape these patterns in wild fish populations. However, this potential has not yet been fully exploited. We conducted a meta-analysis on 44 datasets from 34 distinct marine and freshwater species and different types of data (acoustic detections, depth, accel...
Long-term co-occurrence and gregariousness in the migratory common stingray usi...
Kraft, Sebastian; Winkler, Alexander; Abecasis, David; Mourier, J.Aggregations and social interactions play an important role in the movement ecology of many animals, including elasmobranchs. Several of these species have shown the capability of carrying out complex social behaviours, and the importance of sociality in this taxon is being realized. Although it is a growing field of study in the case of these organisms, these processes still need to be better understood, espec...
Fully protected marine areas linked to reduced home ranges of fishes
Ohayon, Sarah; Abecasis, David; Almeida, Pedro R.; Alós, Josep; Aspillaga, Eneko; Belo, Ana Filipa; Costa, José Lino; Di Franco, AntonioHome range size is a fundamental trait that can affect the probability of fish being harvested and, at the same time, may be affected by fishing. The relationship between home range size and fishing will impact the effectiveness of fully protected areas (FPAs), as it will influence the number of fish moving into fished areas, affecting both spillover and edge effects. One hypothesis is that individuals within F...
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...
Tagging mortality in acoustic telemetry studies: insights from a multispecies a...
Martínez Ramírez, Lucas; Bentes, Luis; Dias Almeida Cardoso, André Filipe; Erzini, Karim; Gandra, Miguel; Kraft, Sebastian; Winkler, AlexanderThe widespread adoption of acoustic telemetry has transformed our understanding of marine species' behavior and movement ecology. However, accurately interpreting telemetry data, especially concerning tagging mortality, is essential for drawing valid conclusions. In this study, we scrutinized tagging mortality in 223 individuals across 14 species and evaluated the impact of tagging methodologies, including capt...
Horizontal and vertical movements of the critically endangered Rostroraja alba ...
Kraft, Sebastian; Winkler, Alexander; Abecasis, DavidElasmobranchs are slow-growing marine predators whose populations have declined due to their susceptibility to overfishing, especially affecting species of large size. Rostroraja alba is a large skate that is currently classified as critically endangered. 2. To address the effects of overfishing and promote the recovery of marine species and habitats, marine protected areas (MPAs) are a commonly implemented man...
Tracking aquatic animals for fisheries management in European waters
Özgül, Aytaç; Birnie‐Gauvin, Kim; Abecasis, David; Alós, Josep; Aarestrup, Kim; Reubens, Jan; Bolland, Jon; Lök, Altan; Edwards, Jena E.; Pengal, PolonaAcoustic telemetry (AT) has emerged as a valuable tool for monitoring aquatic animals in both European inland and marine waters over the past two decades. The European Tracking Network (ETN) initiative has played a pivotal role in promoting collaboration among AT researchers in Europe and has led to a significant increase in the number of tagged and observed aquatic animals in transboundary European waters. Whi...
Meagre (Argyrosomus regius) move westward with favourable flows along the south...
Garel, Erwan; Winkler, Alexander; Gunasekara, S.S.; Abecasis, David; de Oliveira Júnior, LucianoBased on acoustic detections from a network of five stations along the south coast of Portugal, 25 transits of tagged meagre were identified between 2019 and 2020, mostly in summer. Comparisons with hourly current measurements from a moored Acoustic Doppler current Profiler and an High Frequency Radar system indicate that meagre move westward with favourable alongshore flows at a confidence level > 90% (while e...
Seasonal movement dynamics of the commercially important thornback ray (Raja cl...
Kraft, Sebastian; Winkler, Alexander; Abecasis, DavidElasmobranchs are a group of slow growing species whose populations are in decline mostly due to their susceptibility to overfishing. A common approach to protect marine species is to establish marine protected areas (MPAs). Data on the spatial ecology of species is key information for MPA implementation and management. However, this information is usually lacking, particularly for elasmobranchs. In this study,...