9 research outputs found
Preparing for a Bsal invasion into North America has improved multi-sector readiness
Western palearctic salamander susceptibility to the skin disease caused by the amphibian chytrid fungus Batrachochytrium salamandrivorans (Bsal) was recognized in 2014, eliciting concerns for a potential novel wave of amphibian declines following the B. dendrobatidis (Bd) chytridiomycosis global pandemic. Although Bsal had not been detected in North America, initial experimental trials supported the heightened susceptibility of caudate amphibians to Bsal chytridiomycosis, recognizing the critical threat this pathogen poses to the North American salamander biodiversity hotspot. Here, we take stock of 10 years of research, collaboration, engagement, and outreach by the North American Bsal Task Force. We summarize main knowledge and conservation actions to both forestall and respond to Bsal invasion into North America. We address the questions: what have we learned; what are current challenges; and are we ready for a more effective reaction to Bsal’s eventual detection? We expect that the many contributions to preemptive planning accrued over the past decade will pay dividends in amphibian conservation effectiveness and can inform future responses to other novel wildlife diseases and extreme threats
Effects of ophidiomycosis on movement, survival, and reproduction of eastern foxsnakes (Pantherophis vulpinus)
Abstract Ophidiomycosis (snake fungal disease) is caused by the fungal pathogen Ophidiomyces ophidiicola, which causes dermal lesions, occasional systemic infections, and in some cases, mortality. To better understand potential conservation implications of ophidiomycosis (i.e., population-level effects), we investigated its impacts on individual fitness in a population of endangered eastern foxsnakes (Pantherophis vulpinus). We tracked 38 foxsnakes over 6Â years and quantified body condition, movement patterns, oviposition rates, and survival. Body condition, distance travelled, and oviposition rates were similar between snakes with and without ophidiomycosis. Interestingly, snakes that tested positive for the pathogen travelled farther, suggesting that movement through a greater diversity of habitats increases risk of exposure. Ophidiomycosis did not negatively affect survival, and most apparently infected snakes persisted in a manner comparable to snakes without ophidiomycosis. Only one mortality was directly attributed to ophidiomycosis, although infected snakes were overrepresented in a sample of snakes killed by predators. Overall, our results suggest that ophidiomycosis may have sublethal effects on eastern foxsnakes, but do not suggest direct effects on survival, ovipositioning, or viability of the study population
Análise da complexidade, estratégias e aprendizagem em projetos de melhoria contÃnua: estudos de caso em empresas brasileiras Analysis of complexity, strategies, and learning organization in continuous improvement processes: case studies in brazilian companies
O objetivo deste artigo é analisar projetos de melhoria contÃnua desenvolvidos por empresas industriais brasileiras com base na abordagem/programa da Manutenção Produtiva Total (Total Productive Maintenance, TPM) e da Qualidade Total (Total Quality Management, TQM). As variáveis estudadas nas análises dos projetos foram as seguintes: i) complexidade dos projetos; ii) seus objetivos especÃficos; iii) as estratégias competitivas relacionadas; iv) o aprendizado organizacional obtido; e v) as ferramentas e os principais pilares do TPM implementados. Selecionou-se para estudo projetos considerados de sucesso por suas empresas. Ao todo, analisaram-se 42 projetos de 12 diferentes empresas que representaram diversos segmentos industriais do Brasil. Os resultados indicaram correspondência entre a natureza do projeto, em termos da sua complexidade e estrutura organizacional, com a estratégia competitiva adotada.<br>This paper analyses the major goals and results of TPM and TQM processes in companies that adopt these approaches. The main variables considered in this study were: i) complexity of the projects developed by the companies; ii) projects´ specific goals iii) relationship between the projects and the company's strategy; iv) relationship between projects and continuous improvement and organizational learning; v) tools and TPM concepts that support the projects. A descriptive research was carried out using field research strategies. Forty-two processes adopted by 12 companies were analyzed in this study. The processes implemented were considered successful by the companies that adopt them and by outside specialists. The results indicated close relationship between the project`s nature (its complexity and team structure) and the company`s strategy, project goals and organizational learning