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The time required to recover from cold exposure (chill coma recovery time) may represent an important metric of performance and has been linked to geographic distributions of diverse species. Chill coma recovery time (CCRT) has rarely been measured in bumble bees (genus Bombus) but may provide insights regarding recent changes in their distributions. We measured CCRT of Bombus vosnesenskii workers reared in common garden laboratory conditions from queens collected across altitude and latitude in the Western United States. We also compared CCRTs of male and female bumble bees because males are often overlooked in studies of bumble bee ecology and physiology and may differ in their ability to respond to cold temperatures. We found no relationship between CCRT and local climate at the queen collection sites, but CCRT varied significantly with sex and body mass. Because differences in the ability to recover from cold temperatures have been shown in wild-caught Bombus, we predict that variability in CCRT may be strongly influenced by plasticity.
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http://dx.doi.org/10.1007/s00360-021-01385-7 | DOI Listing |
Cureus
August 2025
Neurology, Government Medical College, Amritsar, Amritsar, IND.
Tubercular (TB) meningitis is one of the manifestations of central nervous system tuberculosis, a form of extrapulmonary tuberculosis. Despite the high incidence of TB meningitis in developing countries, there are hardly any reports of associated ventriculitis, making it one of the rare complications. Ventriculitis complicating TB meningitis is devastating not only to the immunocompromised but also to the immunocompetent population.
View Article and Find Full Text PDFJ Exp Zool A Ecol Integr Physiol
August 2025
Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA), Universidad Nacional del Comahue and CONICET, Bariloche, Argentina.
Temperature is a key environmental factor influencing the establishment and spread of insect species. Differences in thermal tolerance may thus explain patterns of geographical distribution and dominance during biological invasions. The native Patagonian bumblebee, Bombus dahlbomii, is being displaced by the exotic Bombus terrestris, which has expanded throughout its range.
View Article and Find Full Text PDFSay is a univoltine, ground-nesting solitary bee and one of the first pollinators to emerge in the North American springtime. Males emerge earlier and are smaller than females. Despite its role as a pollinator of early spring wild plants and crops, the thermal ecology of remains unexplored.
View Article and Find Full Text PDFPest Manag Sci
August 2025
Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou, China.
Background: The Drosophila melanogaster gene CG18314 encodes a DopEcR, which is implicated in various physiological functions. However, genome-wide analyses of insect neurohormone GPCRs have identified CG13579 and its orthologs as putative DopEcRs, whose functions remain largely unexplored.
Results: We here identified an ortholog of CG13579 in the oriental fruit fly, Bactrocera dorsalis.
Sci Rep
July 2025
Department of Biology, Austin Peay State University, Clarksville, TN, 37044, USA.
Western corn rootworm, Diabrotica virgifera virgifera, is one of the most economically important crop pests in the world with estimates of damage and control costing over $1 billion USD annually. Yet despite an abundance of research devoted to studying rootworm biology in the central Corn Belt of the United States, information on key aspects of their thermal biology is still lacking. In this study, we quantified thermal metrics of western corn rootworm populations from across their range in the United States: we measured critical thermal limits, knock-down resistance, and chill coma recovery for male and female rootworm from 13 laboratory colonies that were collected across 1985 km at locations that varied by up to 5.
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