28 documents found, page 1 of 3
Nutrient input from green turtle eggs and hatchlings in a west Africa Island an...
Ferreira Raposo, Cheila Sofia; Patrício, Ana Rita; Catry, Paulo; Barbosa, Castro; Camará, Assana; Regalla, Aissa; Rebelo, RuiSea turtle nesting brings marine-derived nutrients into sandy beach ecosystems, potentially influencing their dynamics. We investigated nutrient input from green turtle <jats:italic>Chelonia mydas</jats:italic> 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...
The relevance of Evolutionary Significant Units for the conservation of island-...
Rato, Catarina; Oliveira, Paulo; Menezes, Dília; Funk, Stephan M.; Rebelo, Rui; Nogales, Manuel; Rocha, RicardoWithin vertebrates, reptiles are good island colonisers, often leading to considerable levels of intraspecific diversity among populations inhabiting different islands/archipelagos. This study explores the mitochondrial phylogeographic structure of Tarentola boettgeri, a gecko species endemic to the Macaronesian archipelagos of Selvagens and the Canary Islands. Our research introduces a novel monophyletic group...
Spatial distribution of inter-nesting green turtles from the largest Eastern At...
Raposo, Cheila; Mestre, Julie; Rebelo, Rui; Regalla De Barros, Aissa; Davies, Alasdair; Barbosa, Castro; Patrício, Ana RitaUnderstanding the spatial distribution of wildlife is fundamental to establish effective conservation measures. Tracking has been key to assess movement patterns and connectivity of sea turtles, yet some regions of great significance are largely understudied. We tracked 44 green turtles from the largest rookery in the Eastern Atlantic, on Poilão Island, Guinea-Bissau, during 2018 through 2020, to assess their i...
Increasing biological knowledge for better management of by-catch species: Age,...
Sequeira, Vera; Sousa, Inês; Neves, Ana; Vieira, Ana Rita; Silva, Elisabete; Silva, Frederica; Duarte, Ana Marta; Mendes, Susana; Ganhão, RuiGurnards are a valuable by-catch of mixed demersal fisheries and are commercially important in European waters, but they are often discarded, reported under “mixed gurnards” and with incomplete biological information by species. In the present work, a total of 558 piper gurnard specimens of between 10.9 and 44.4 cm (1 to 11 years) and 425 red gurnard specimens of between 10.2 and 42.1 cm (0 to 9 years) from the...
Spatial distribution of inter-nesting green turtles from the largest Eastern At...
Raposo, C; Mestre, J; Rebelo, Rui; Regalla, A; Davies, A; Barbosa, C; Patrício, ARUnderstanding the spatial distribution of wildlife is fundamental to establish effective conservation measures. Tracking has been key to assess movement patterns and connectivity of sea turtles, yet some regions of great significance are largely understudied. We tracked 44 green turtles from the largest rookery in the Eastern Atlantic, on Poilão Island, Guinea-Bissau, during 2018 through 2020, to assess their i...
Using and Creating Microclimates for Cork Oak Adaptation to Climate Change
Vizinho, André; Príncipe, Adriana; Vasconcelos, Ana Cátia; Rebelo, Rui; Branquinho, Cristina; Penha-Lopes, GilIn Mediterranean climate regions, climate change is increasing aridity and contributing to the mortality rate of Quercus suber, reducing the success of reforestation efforts. Using and creating microclimates is a recommended climate adaptation strategy that needs research. Our hypothesis is that planting Q. suber in north-facing slopes and water lines results in a higher survival rate than those that are plante...
Fine-scale foraging segregation in a green turtle (Chelonia mydas) feeding grou...
Madeira, Fernando Miguel; Rebelo, Rui; Catry, Paulo; Neiva, João Guilherme; Barbosa, Castro; Regalla De Barros, Aissa; Patrício, Ana RitaGreen turtles (Chelonia mydas) are highly dependent on neritic foraging areas throughout much of their life. Still, knowledge of recruitment dynamics, foraging habits, and habitat use in these areas is limited. Here, we evaluated how the distribution and food preferences of green sea turtles from different life stages varied within a foraging aggregation. We focused on two islands in Guinea-Bissau, Unhocomo and...
Seasonal study of the nutritional composition of unexploited and low commercial...
Duarte, Ana M.; Silva, Frederica; Mendes, Susana; Pinto, Filipa R.; Barroso, Sonia; Silva, Elisabete; Neves, Ana; Sequeira, VeraTarget species diversification is essential for fisheries sustainability and fish market revitalization. Fish discards are a widely recognized problem resulting from fisheries worldwide, and are of major concern for all sector players, from administrations, to fishermen, and scientists. However, non-target species are seldom studied, and information on nutritional profiles and seasonal changes in nutritional pr...
Reproduction of the Blue Jack Mackerel, Trachurus picturatus, in Western Portug...
Neves, Ana; Sequeira, Vera; Vieira, Ana Rita; Silva, Elisabete; Silva, Frederica; Duarte, Ana Marta; Mendes, Susana; Ganhão, Rui; Assis, CarlosBlue jack mackerel, Trachurus picturatus, is the fifth most landed fish species in mainland Portugal, but information on its reproductive biology is scarce. From September 2018 to August 2019, 626 specimens were collected from commercial vessels to clarify the reproductive strategy of the T. picturatus population off the west coast of Portugal. The proportion and length range of males and females were similar. ...
Modelling fish growth with imperfect data: The case of Trachurus picturatus
Neves, Ana; Vieira, Ana Rita; Sequeira, Vera; Silva, Elisabete; Silva, Frederica; Duarte, Ana Marta; Mendes, Susana; Ganhão, Rui; Assis, CarlosGrowth modelling is essential to inform fisheries management but is often hampered by sampling biases and imperfect data. Additional methods such as interpolating data through backcalculation may be used to account for sampling bias but are often complex and time-consuming. Here, we present an approach to improve plausibility in growth estimates when small individuals are under-sampled, based on Bayesian fittin...