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Nutrient input from green turtle eggs and hatchlings in a west Africa Island and its nearshore environment

Publication . Raposo, Cheila; Patrício, Ana Rita; Catry, Paulo; Barbosa, Castro; Camará, Assana; Regalla, Aissa; Rebelo, Rui; Ferreira Raposo, Cheila Sofia

Sea turtle nesting brings marine-derived nutrients into sandy beach ecosystems, potentially influencing their dynamics. We investigated nutrient input from green turtle Chelonia mydas eggs and hatchlings into coastal habitats in Guinea-Bissau, West Africa. We assessed two islands within the João Vieira-Poilão Marine National Park (‘JVPMNP’), with contrasting sea turtle nesting density: very low (João Vieira) and very high (Poilão). On each island, we analyzed stable isotopes of carbon and nitrogen in one pair of plant species (coinvine Dalbergia ecastaphyllum bush/baobab Adansonia digitata tree) and two pairs of predator species (tufted ghost crab Ocypode cursor/African rainbow crab Cardisoma armatum and sea catfish Carlarius spp./crevalle jack Caranx hippos). The first species in each pair is distributed closer to nesting sites, while the second is found further inland or offshore. Stomach content analysis was also conducted for fishes. Results supported nutrient input from turtle clutches benefiting the species living near nesting sites. Shoreline coinvines at Poilão had higher δ15N (5.1 ± 3.2‰) compared to João Vieira (≈0‰), suggesting assimilation of turtle-derived 15N. Shoreline tufted ghost crabs at Poilão had enriched δ15N (15.2 ± 0.7‰ vs. João Vieira’s 12.2 ± 1.1‰) and δ13C (− 13.4 ± 0.7‰ vs. João Vieira’s − 18.7 ± 1.4‰), likely reflecting predation upon eggs and hatchlings. Sea catfishes at Poilão frequently consumed unhatched turtle eggs washed into the sea (17% frequency of occurrence) and hatchlings (up to 27%). This study suggests that nutrient availability from turtle nests influences and supports shoreline plants and consumers at JVPMNP.

2025-02-15Journal article

Open access

Mitonuclear genetics reveals a novel perspective on the stock structure and fishery management of skipjack tuna (Katsuwonus pelamis) in the Atlantic Ocean

Publication . Queiroz-Brito, Maria Clara G.; Mendonça, Fernando F.; Robalo, Joana; Arocha, Freddy; Diaha, N’Guessan Constance; Amandé, Monin Justin; Sow, Fambaye Ngom; Angueko, Davy; Travassos, Paulo; Torres, Rodrigo A.

The skipjack tuna, Katsuwonus pelamis is the worldwide most fished and economically significant tuna species. In the Atlantic Ocean, the management strategy of the International Commission for the Conservation of Atlantic Tunas (ICCAT) includes two stocks: (a) eastern (SKJ-E) and (b) western (SKJ-W) stocks. However, the genetic cohesiveness between these stocks remains poorly understood. Here, we provide this information through mitochondrial [control region (CR)] and nuclear (intron S7) data. In both markers, high genetic diversity and no contraction signals in effective population sizes were found, supporting the species conservation status as ‘Least Concern’ by the IUCN and the results of the latest ICCAT assessment of the two stocks. In general, no well-defined genetic-geographic structure was detected, which may be explained by the specie life history strategies, such as large population effective sizes and migratory behavior, with a broad geographical distribution, that reduce the isolation, inbreeding, and genetic drift effects. However, pairwise FST values within and between the Eastern and Western Atlantic suggest some weak to moderate genetic differentiation. These results involved mainly the Eastern Temperate Zone, represented herein by the Azores archipelago. It is important to highlight that higher differentiation levels were found between sites from different stocks. In addition, the CR data revealed a weak but significant genetic differentiation between the eastern and western stocks (FST = 0.0006). These results can be used to improve and support the ICCAT management strategies of skipjack tuna stocks, highlighting the need for a reevaluation and possible alignment between Eastern and Western Atlantic management actions. Similar content being viewed by others

2025-04-11Journal article

Open access

Models of care and associated targeted implementation strategies for cancer survivorship support in Europe: A scoping review protocol

Publication . Prue, Gillian; Czamanski-Cohen, Johanna; Kassianos, Angelos P; Pilleron, Sophie; Ladas, Aristea; Can, Aysun Akcakaya; Roldán-Jiménez, Cristina; Csaba Laszlo; Degi, Gökçe Işcan; Arslan, Sevban; Boer, Angela G E M de; Celebic, Aleksandar; Doñate-Martínez, Ascensión; Alhambra-Borrás, Tamara; Mitrevski, Boce; Marzorati, Chiara; Pravettoni, Gabriella; Grasso, Roberto; Nazik, Evsen; Pawlowska, Ewa; Mucalo, Iva; Patrick, John; Tripkovic, Katica; Vojvodic, Katarina; Karekla, Maria; Moschofidou, Maria; Bayram, Sule Biyik; Brandão, Tânia; Arndt, Volker; Jaswal, Poonam Jaswal; Semerci, Remziye Semerci; Bozkul, Gamze; Sahin, Eda; Toygar, Ismail; Frountzas, Maximos; Martins, Rui Miguel; Jefford, Michael; Keane, Danielle; Hegarty, Josephine

IntroductionCancer and its treatments can lead to a wide range of side-effects that can persist long after treatments have ended. Across Europe, survivorship care is traditionally hospital-based specialist-led follow-up, leading to gaps in supportive care. Improved screening, diagnosis and treatment increase survival rates. With more individuals living with, through and beyond cancer, the predominance of the hospital-based specialist model is unsustainable, costly and resource-intensive. An understanding of what alternative Models of Care are available and the barriers and facilitators to their implementation is a first step towards enhancing supportive care across the cancer journey. The aim of this scoping review is to source and synthesise information from studies evaluating patient-oriented models of cancer survivorship supportive care for adults in Europe.Methods and analysisThe scoping review will be reported in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses—Scoping Review Extension guidelines and will be guided by a six-stage methodological framework. A search strategy has been developed according to the Population, Concept and Context structure and will be applied to seven databases. A targeted search of grey literature will be completed. All identified records will be screened using predefined eligibility criteria by at least two researchers and undergo full-text review for inclusion. Data pertaining to the conceptualisation, evaluation and implementation of sourced Models of Care will be extracted.Ethics and disseminationAs there is no primary data, ethical approval is not required. This review will be conducted as part of the EU COST Action CA21152—Implementation Network Europe for Cancer Survivorship Care. The protocol and subsequent scoping review will be published in a peer-reviewed journal. The Action involves representatives from most countries across Europe which will assist with the dissemination of the work to key stakeholders.

2025-02Journal article

Open access

Portuguese Version of a Value Beliefs Scale: Psychometric properties among vocational secondary school students

Publication . Pipa, Joana; Silva, Pedro Leite; Peixoto, Francisco

The subjective task value (STV) aspect of Expectancy-Value Theory has recently gained significance in achievement motivation research. It posits that students are motivated to engage in a particular task due to its intrinsic value, attainment value, utility value, and perceived cost. More recently, these components have been divided into more specific facets. This study aimed to adapt Gaspard et al. (2017) value beliefs scale for Portuguese vocational secondary school students in the subjects of Portuguese and Mathematics. The confirmatory factor analysis conducted with 1859 students (Mage = 16.02) suggested that a hierarchical structure of STV fits the data adequately, with ten specific facets organized into four second-order components. Construct reliability, as well as convergent and discriminant validity, was also achieved. This instrument offers a useful tool for assessing students’ STV

2025-05-09Journal article

Open access

Exploring the factor structure of criminogenic cognitions in incarcerated males: Psychometric evaluation of the Criminogenic Cognitions Scale (CCS)

Publication . Pereira, Teresa; Oliveira, Catarina; Basto Pereira, Miguel

Despite the importance of criminogenic thinking in addressing criminal behavior, validated instruments to measure these cognitions in Portuguese forensic settings are scarce. Therefore, the main aim of this study was to explore the psychometric properties of the Criminogenic Cognitions Scale (CCS) in a sample of 364 Portuguese incarcerated males (Mage = 37.88, SD = 10.88). An exploratory factor analysis was conducted, indicating a 15-item, two-factor structure (KMO = 0.82; Bartlett’s test, χ2 = 1841.2, df = 105, p < 0.001). The CCS dimensions, comprising Short-Term Orientation and Responsibility Evasion and Authority Resistance, demonstrated satisfactory psychometric properties, including convergent validity with antisocial traits, moral disengagement, and self-control dimensions, as well as internal consistency (omega coefficient = 0.60–0.77; composite reliability = 74–91; coefficient H = 89–95), and sensitivity of items. The CCS is a valuable tool within prison settings for assessing criminogenic thinking patterns, supporting risk assessment, the development of targeted rehabilitation programs, and monitoring cognitive changes over time to reduce recidivism, thereby promoting inmates’ safer reintegration into society. Overall, our findings suggest the CCS is a promising tool for assessing criminogenic cognitions in the forensic Portuguese population.

2025-02-21Journal article

Open access