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- Movement patterns of the invasive atlantic blue crab in a northeastern atlantic estuaryPublication . Encarnação, João Pedro da Silva; Morais, Pedro; Abecasis, David; Martínez Ramírez, Lucas; Barra, Melissa; Baptista, Vânia; Carere, Claudio; Teodosio, MariaThe 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 key prey species for the Atlantic blue crab and quantified niche overlap with other crab species; however, the areas where the impacts are likely to be greater remain unexplored. Thus, we aim at studying its spatial ecology and assess which areas of a tidal estuary (Guadiana, Portugal) are predominantly used by the invasive Atlantic blue crab through acoustic telemetry. A total of 24 specimens were collected in the estuary in 2022, tagged, and tracked for up to nine months using four acoustic receivers located at 1, 3, 11, and 20 km from the river mouth. Two predominant patterns were observed: 1) movements along the estuary synchronized with the tide, and 2) extended residency periods in the transition between the middle and upper estuary. These findings can now inform policy makers and be used to better design local management plans, namely in upper areas of the Guadiana estuary where the species tends to aggregate, making it easier to be targeted by artisanal fisheries, when compared to coastal areas.
- The potential risk of bactrocera dorsalis (Tephritidae) invasion into the fruit industry in the iberian peninsula: a reviewPublication . Wijekoon, Chandana Dammika; Duarte, Amilcar; Neto, LuísBactrocera dorsalis (Hendel, 1912) (Diptera: Tephritidae) is considered a highly invasive fruit fly species already widespread in Indo-Asia and sub-Saharan Africa. In recent years, this species has extended its range into new regions previously considered unsuitable, posing an alarming new risk for the subtropical regions of Europe. This review aimed to assess the potential risk of B. dorsalis invasion into the fruit industry in the Iberian Peninsula, the southwesternmost tip of Europe. With the collected information from published scientific knowledge on B. dorsalis’s distribution, biology, climatic tolerance, host plant diversity, and recent invasion pathways, we have provided an assessment of the possibilities of introducing this alarming fruit fly species to the Iberian Peninsula. In this review, we found that B. dorsalis has been recently reported in several adjacent European countries such as France, Italy, and Austria, and it serves as a warning signal to the Iberian Peninsula for the possible risks that this species poses in the future. Considering this persistent threat posed by B. dorsalis, we reviewed its potential future threat by considering the status of the fruit industry and Mediterranean climate in the Iberian Peninsula. We also considered the findings of recent climatic forecasting models. This review provides a theoretical basis for the prospective intrusion of B. dorsalis into the Iberian Peninsula’s fruit industry, as well as the potential impact following its establishment, together with recommendations for restricting the introduction and spread.
- Oceanography data acquisition and analysisPublication . Robledo, Ivan Piquer; Gauci, Adam; Fernandez, HelenaDetailed bathymetry is necessary for reliable coastal zone management and operations. While traditional in-situ echo sounding offers high precision, it suffers from inefficiencies in shallow waters and incurs logistical costs. Similarly, LiDAR mapping provides efficient coverage of coastal areas but comes with high acquisition expenses. In contrast, Satellite Derived Bathymetry presents a more cost-effective alternative for mapping coastal regions, albeit typically at a lower resolution. This study addresses the need for precise shallow water bathymetry around the Maltese Islands by integrating in-situ and remote data from Landsat 9, Planet Scope and Sentinel 2-A satellites. We investigate both conventional linear regression models and advanced machine learning techniques, specifically the Random Forest algorithm. An empirical workflow was developed from various band combinations, calibrated against extensive on-site measurements. The research provides a comprehensive insight into the depth accuracy achievable for shallow coastal regions using these diverse satellite platforms and modeling approaches, contributing to more efficient and reliable bathymetric mapping for coastal applications.
- Histórias de sucesso universitário de diplomados com deficiência: uma análise ecológica de fatores pessoais e contextuaisPublication . Mestre, Cristina Soares; Borges, Maria LeonorEste trabalho de investigação teve como objetivo compreender os fatores que contribuíram para o sucesso académico de diplomados com deficiência no ensino superior, centrando-se nas suas experiências, percursos e perceções. Com base numa abordagem ecológica e numa metodologia qualitativa de cariz descritivo e interpretativo, procurou-se identificar a interação entre fatores pessoais e contextuais que permitiram aos participantes aceder, permanecer e concluir com êxito a formação universitária. O estudo integrou-se num projeto internacional coordenado pela Universidade de Sevilha e, em Portugal, pela Universidade do Algarve. Utilizou-se o método biográfico-narrativo, através da realização de entrevistas semiestruturadas a seis diplomados com diferentes tipos de deficiência, que partilharam os seus desafios, estratégias, apoios e conquistas no percurso académico. A análise das entrevistas foi orientada por uma grelha de categorias previamente validada, distinguindo fatores internos (como autodeterminação, resiliência, autoeficácia e autonomia) e fatores externos (como apoio familiar, relações interpessoais, serviços de apoio e políticas institucionais). Os testemunhos revelaram que o sucesso académico é um fenómeno complexo, que não se reduz ao desempenho académico, mas inclui também crescimento pessoal, sentido de pertença, superação de barreiras e construção de uma identidade positiva enquanto estudante universitário. A investigação evidenciou a importância de um ambiente universitário inclusivo, acessível e sensível à diversidade, bem como a necessidade de formação contínua da comunidade académica. Este estudo reforça a relevância de escutar as vozes dos próprios estudantes com deficiência, valorizando as suas experiências e promovendo a transformação das práticas educativas e institucionais no ensino superior.