To test whether variation in muscle efficiency contributes to thermal stability during flight in the orchid bee, Euglossa imperialis, we measured CO2 production, heat loss and flight kinematics at different air temperatures (Ta). We also examined the relationship between wingbeat frequency (WBF) and Ta in five additional species of orchid bees. Mean thoracic temperature (Tth) for Eg. imperialis...

First off, bottoms up to you for seeking out strategies to keep your drinking in check! To maintain your safety (and the safety of others), and to make sure you?re not ?that guy? or ?that gal? at a soirée with all your closest friends (you know, the one stuck in the bathroom sick all night), it?s helpful to know strategies for limiting or pacing your drinking. Depending on the type of social si...

The eleventh volume in the series presents two articles on aurora borealis by Friedrich Christoph Mayer (1697–1729), a mathematician at Imperial Academy of Sciences Saint Petersburg. first paper, titled “De Luce Boreali” (On Northern Light), was presented during session newly founded October 1726. It printed years later (1728) very its official periodical, Commentarii Academiae Scientiarum Impe...

Knowledge of the effects of thermal conditions on animal movement and dispersal is necessary for a mechanistic understanding of the consequences of climate change and habitat fragmentation. In particular, the flight of ectothermic insects such as small butterflies is greatly influenced by ambient temperature. Here, variation in body temperature during flight is investigated in an ecological mod...

Fritillaria oranensis (Liliaceae) was described in 1874 by pomel from Algeria. Plant samples have been collected from the mount of Tessala (Sidi-Bel-Abbes). The morphological features of various organs of the plant are described in detail. In the morphological part of the study, features of various organs of the plants such as stem and leaf were determined and illustrated. Ecological studies pr...

The genus Fritillaria comprises of 165 taxa of medicinal, ornamental and horticultural importance. Evolutionary relationships in this genus is an interesting research area, attracting many researchers. In this study, phylogenetic relationships among 18 native to endemic species in Iran belonging to four subgenera Petilium, Theresia, Rhinopetalum and Fritillaria, are assessed using chloroplast t...