No abstract

Invasive Indo-Pacific lionfish (Pterois volitans) have rapidly expanded in the Western Atlantic over the past decade and have had a significant negative impact on reef fish biodiversity, habitat, and community structure, with lionfish out-competing native predators for resources. In an effort to reduce this population explosion, lionfish have been promoted for human consumption in the greater Caribbean region. This study examined whether the geographical expansion of the lionfish into a known ciguatera-endemic region can pose a human health threat for ciguatera fish poisoning (CFP). More than 180 lionfish were collected from waters surrounding the US Virgin Islands throughout 2010 and 2011. Ciguatoxin testing included an in vitro neuroblastoma cytotoxicity assay for composite toxicity assessment of sodium-channel toxins combined with confirmatory liquid chromatography tandem mass spectrometry. A 12% prevalence rate of ciguatoxic lionfish exceeding the FDA guidance level of 0.1 µg/kg C-CTX-1 equivalents was identified in fish from the U.S. Virgin Islands, highlighting a potential consumption risk in this region. This study presents the first evidence that the invasive lionfish, pose a direct human health risk for CFP and highlights the need for awareness and research on this food safety hazard in known endemic areas.

Virtual reality (VR) and augmented reality (AR) programs have proliferated significantly in recent years and they are finding their way into different educational and therapeutic purposes. This systematic review aims at analyzing the virtual reality and augmented reality programs designed to promote the development of social skills in individuals with intellectual disability. Searches were carried out in the Scopus, Science Direct, Springer and Web of Science databases in the period from 2005 to 2020. A total of six articles met the inclusion criteria. A descriptive data analysis was performed. The results show that the clinical profile of the individuals who participated in the interventions is diverse. It can be concluded that there is some scientific evidence that points to the usefulness of VR and AR in the development of intervention programs to improve the social skills of individuals diagnosed with developmental deficits. However, it is necessary to acknowledge methodological limitations such as the lack of control groups, follow-up measures and of generalization of the results.

New uses for social networks are emerging in educational fields offering endless materials for the teaching–learning process. Skills development therefore leads to an education focused on sustainable development. Proper use of social media is especially important to achieve Sustainable Development Goal (SDG) 4 of the 2030 Agenda, which proclaims inclusive and equitable quality education and promotes lifelong learning opportunities for all—a trend that implies large data volumes that can be manipulated and adapted to the needs of each student, thus opening up new perspectives. This study aims to identify the differences between the use of social networks among students classed into two generations, X and Y. With that aim in mind, the results of a survey administered to 338 university students engaged in online studies showed significant differences, mainly in relation to social issues. Both generations nevertheless agreed on the benefits and uses of social networks within the academic field. The conclusions reaffirm the use of these resources for improving teaching and learning processes within online environments.

Evaluación entre iguales en entornos de educación superior online mediante el taller de Moodle.