Effectiveness of an educational intervention on health risks of vaping for high school-aged adolescents.

OBJECTIVE: The primary objective of this research was to identify if an educational intervention increased the knowledge of high school adolescents on the social and health risks associated with vaping. The secondary objectives included measuring the prevalence of vaping habits and the attitudes of adolescents on the safety of vaping. METHODS: This research was conducted with adolescents at a single high school. An evidence-based educational intervention was provided on the health risks associated with vaping PRODUCTS: Data were collected using a pre- and postsurvey tool. The material presented was targeted on the basis of age and making the information relevant and easy to understand. RESULTS: A total of 235 participants showed a 14% increase in scores from the pre- to postsurvey, indicating an increase in knowledge (P < 0.001). Gender was not a predictor for vaping behavior, but grade level was. A significantly higher proportion of participants who vaped reported vaping being safer than smoking than those who did not vape (χ2 = 13.31, P = 0.001). The most common reason for vaping was stress reduction. For the participants who reported vaping, the most common reason indicated that would motivate them to stop the use of vaping products was concern regarding the negative impact on personal or family health (n = 43). CONCLUSION: An educational intervention was successful in improving high school students' knowledge on the risks associated with vaping. Knowledge on health risk was the most common reported reason for which students would stop vaping.

Is extinction forever?

Mistrust of science has seeped into public perception of the most fundamental aspect of conservation-extinction. The term ought to be straightforward, and yet, there is a disconnect between scientific discussion and public views. This is not a mere semantic issue, rather one of communication. Within a population dynamics context, we say that a species went locally extinct, later to document its return. Conveying our findings matters, for when we use local extinction, an essentially nonsensical phrase, rather than extirpation, which is what is meant, then we contribute to, if not create outright, a problem for public understanding of conservation, particularly as local extinction is often shortened to extinction in media sources. The public that receives the message of our research void of context and modifiers comes away with the idea that extinction is not forever or, worse for conservation as a whole, that an extinction crisis has been invented.

The tree of life and a new classification of bony fishes.

The tree of life of fishes is in a state of flux because we still lack a comprehensive phylogeny that includes all major groups. The situation is most critical for a large clade of spiny-finned fishes, traditionally referred to as percomorphs, whose uncertain relationships have plagued ichthyologists for over a century. Most of what we know about the higher-level relationships among fish lineages has been based on morphology, but rapid influx of molecular studies is changing many established systematic concepts. We report a comprehensive molecular phylogeny for bony fishes that includes representatives of all major lineages. DNA sequence data for 21 molecular markers (one mitochondrial and 20 nuclear genes) were collected for 1410 bony fish taxa, plus four tetrapod species and two chondrichthyan outgroups (total 1416 terminals). Bony fish diversity is represented by 1093 genera, 369 families, and all traditionally recognized orders. The maximum likelihood tree provides unprecedented resolution and high bootstrap support for most backbone nodes, defining for the first time a global phylogeny of fishes. The general structure of the tree is in agreement with expectations from previous morphological and molecular studies, but significant new clades arise. Most interestingly, the high degree of uncertainty among percomorphs is now resolved into nine well-supported supraordinal groups. The order Perciformes, considered by many a polyphyletic taxonomic waste basket, is defined for the first time as a monophyletic group in the global phylogeny. A new classification that reflects our phylogenetic hypothesis is proposed to facilitate communication about the newly found structure of the tree of life of fishes. Finally, the molecular phylogeny is calibrated using 60 fossil constraints to produce a comprehensive time tree. The new time-calibrated phylogeny will provide the basis for and stimulate new comparative studies to better understand the evolution of the amazing diversity of fishes.