Habitat and respiratory strategy effects on hypoxia performance in anuran tadpoles.

A critical component of animal conservation in a changing world is an understanding of the physiological resilience of animals to different conditions. In many aquatic animals, hypoxia (low environmental oxygen levels) is a regular occurrence, but the likelihood and severity of hypoxia varies across habitats. Fast-flowing, stream-like habitats are never hypoxic, so long as flow is maintained. Do animals from such habitats retain the capacity to survive hypoxic conditions? We use aquatic frog tadpoles to test the effects of natural habitat on performance in hypoxia in an experimental framework, finding that stream-living tadpoles have reduced performance in hypoxia. Tadpoles also vary in lung presence, with some species able to breathe air during hypoxia. We found that among lunged tadpoles, air-breathing rates increase in hypoxia in pond-living species but not stream-living species. Lung presence was also found to influence hypoxia performance, as lungless, stream-living tadpoles were found to be especially vulnerable to hypoxia, while pond-living, lungless tadpoles appeared largely resilient to hypoxia. We consider the ramifications of our findings on conservation outlooks and strategies for frogs and their tadpoles, suggesting that stream-living tadpoles, and especially lungless, stream-living tadpoles, may be particularly at risk to factors that reduce stream flow. Thus, a primary goal for conservation and management of species with stream-living tadpoles should be the maintenance of year-round streamflow, which oxygenates waters and prevents hypoxia.

A Psychosocial Care Model for Families Affected by Congenital Heart Disease.

OBJECTIVES: To develop a model of family-based psychosocial care for congenital heart disease (CHD). DESIGN: Qualitative study using crowdsourced data collected from parents of young children with CHD who received care across 42 hospitals. SETTING: Yammer, a social networking platform used to facilitate online crowdsourcing and qualitative data collection. SUBJECTS: Geographically diverse sample of 100 parents (72 mothers and 28 fathers) of young children with CHD. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Parents joined a private group on Yammer and responded to 37 open-ended study questions over a 6-month period. Qualitative data were coded and analyzed using an iterative process. Three broad themes corresponding to pillars of family-based psychosocial care were identified: pillar 1) parent partnership in family-integrated medical care, pillar 2) supportive interactions focused on parent and family wellbeing, and pillar 3) integrated psychosocial care and peer support for parents and families. Each pillar was supported by subthemes corresponding to specific intervention strategies. Most parents described the need for intervention strategies across multiple pillars, with almost half reporting needs across all three pillars of psychosocial care. Parents' preferences for psychosocial support changed over time with changes to their child's medical status and across care settings (e.g., hospital, outpatient clinic). CONCLUSIONS: Results support a model of family-based psychosocial care that is multidimensional and flexible to meet the needs of families affected by CHD. All members of the healthcare team play an important role in providing psychosocial support. Future research incorporating components of implementation science is needed to promote uptake of these findings, with the goal of optimizing family-based psychosocial support in the hospital setting and beyond.

A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic.

The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about a situation. Participants from 87 countries and regions (n = 21,644) were randomly assigned to one of two brief reappraisal interventions (reconstrual or repurposing) or one of two control conditions (active or passive). Results revealed that both reappraisal interventions (vesus both control conditions) consistently reduced negative emotions and increased positive emotions across different measures. Reconstrual and repurposing interventions had similar effects. Importantly, planned exploratory analyses indicated that reappraisal interventions did not reduce intentions to practice preventive health behaviours. The findings demonstrate the viability of creating scalable, low-cost interventions for use around the world. PROTOCOL REGISTRATION: The stage 1 protocol for this Registered Report was accepted in principle on 12 May 2020. The protocol, as accepted by the journal, can be found at https://doi.org/10.6084/m9.figshare.c.4878591.v1.