32 documents found, page 1 of 4

Inter-island nesting dynamics and clutch survival of green turtles Chelonia myd...

Understanding spatial heterogeneity in reproductive success among at-risk populations facing localised threats is key for conservation. Sea turtle populations often concentrate at one nesting site, diverting conservation efforts from adjacent smaller rookeries. Poilão Island, Bijagós Archipelago, Guinea-Bissau, is a notable rookery for green turtles Chelonia mydas within the João Vieira-Poilão Marine National P...

Limb malformations in a 1982 museum collection of Pleurodeles waltl larvae

Non-Lethal Detection of Ranavirus in Fish

Using and Creating Microclimates for Cork Oak Adaptation to Climate Change

In 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...

Increasing biological knowledge for better management of by-catch species: age,...

Gurnards 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 spe-cies. 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 th...

Using fuorescent paint as an effective short-term marker in a high-density rook...

We report on a short-term marking protocol that uses weather-resistant high-contrast fuorescent dyes and nondisruptive ultraviolet lights to effectively mark and distinguish between individual green turtles (Chelonia mydas). We feldtested our method in the largest green turtle nesting location in Africa, on Poilão Island i Guinea-Bissau, where it proved to be quick to apply and easy to detect, and non-disruptiv...

How to map potential mesovoid shallow substratum (MSS) habitats? A case study ...

Understanding habitat extension that limits species distribution is a crucial tool for management and conservation, in which habitat mapping plays a pivotal role. The mesovoid shallow substratum (MSS) is a type of shallow subterranean habitat with an important conservation value for invertebrate communities, functioning as climatic/reproductive refuge, biogeographic corridor and/or permanent habitat. Methodolog...

What can genetics tell us about the history of a human-mediated introduction of...

The golden-striped salamander is a streamside species endemic to the northwestern corner of the Iberian Peninsula. In the first half of the twentieth century, an undisclosed number of individuals of this species were reportedly captured in Buçaco, Central Portugal, and deliberately introduced in Sintra Mountains, 170 km south of its native distribution range. The discovery of a breeding population of this salam...

Contrasting patterns from two invasion fronts suggest a niche shift of an invas...

Background The accuracy of predictions of invasive species ranges is dependent on niche similarity between invasive and native populations and on our ability to identify the niche characteristics. With this work we aimed to compare the niche dynamics of two genetically related invasive populations of Vespa velutina (an effective predator of honeybees and wild pollinators), in two distinct climatic regions, one ...

Fine-scale foraging segregation in a green turtle (Chelonia mydas) feeding grou...

Green 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...