Dim-light colour vision in the facultatively nocturnal Asian giant honeybee, Apis dorsata.

We discovered nocturnal colour vision in the Asian giant honeybee Apis dorsata-a facultatively nocturnal species-at mesopic light intensities, down to half-moon light levels (approx. 10-2 cd m-2). The visual threshold of nocturnality aligns with their reported nocturnal activity down to the same light levels. Nocturnal colour vision in A. dorsata is interesting because, despite being primarily diurnal, its colour vision capabilities extend into dim light, while the 'model' European honeybee Apis mellifera is reported to be colour-blind at twilight. By employing behavioural experiments with naturally nesting A. dorsata colonies, we show discrimination of the trained colour from other stimuli during the day, and significantly, even at night. Nocturnal colour vision in bees has so far only been reported in the obligately nocturnal carpenter bee Xylocopa tranquebarica. The discovery of colour vision in these two bee species, despite differences in the extent of their nocturnality and the limitations of their apposition compound eye optics, opens avenues for future studies on visual adaptations for dim-light colour vision, their role in pollination of flowers at night, and the effect of light pollution on nocturnal activity in A. dorsata, a ubiquitous pollinator in natural, agricultural and urban habitats in the Asian tropics and sub-tropics.

"Healthy Heart, Healthy You": Ten-Year Cardiovascular Disease (CVD) Risk among Adults in Anekal Taluk Hospital, Bangalore Urban District, Karnataka.

Background: Cardiovascular Disease (CVD) is the leading cause of mortality globally. Over 75% of CVD deaths occur in low- and middle-income countries. Objectives: To assess the 10-year CVD risk among adults aged 30 years and above attending the outpatient department at a Taluk Hospital, Bangalore Urban District, Karnataka. Methods: A cross-sectional study was conducted among 217 subjects above 30 years of age attending the hospital. They were selected by consecutive sampling and administered a face-validated interview schedule. WHO/ISH CVD risk assessment tool was used to categorize them into four categories of CVD risk. Additional risk factors like alcohol use and smoking were also assessed. Results: The mean age of the subjects was 55.7 ± 12.3 years. About 65% of the study population had low risk (<10%), 21.2% had mild risk (10%-20%), 9.7% had moderate risk (20%-30%) and 4.1% had high risk (>30%) according to the World Health Organization/International Society of Hypertension (WHO/ISH) CVD risk assessment tool. In the study population, 4.6% were abusing alcohol as per the CAGE questionnaire. Conclusion: The burden of CVD risk among the adults interviewed was high. The WHO/ISH chart is an inexpensive tool that can be used for screening in a regular OPD.