The first set of findings from our long-term beetle populations are now out! In a massive effort, collating data across over 5 years, Vrinda and other lab members monitored flour beetle populations exposed to a new, poor habitat — corn flour — instead of the optimal ancestral wheat flour. While we expected some extinction, nearly all... Continue Reading →
Some of the most famous time series in population ecology describe beautiful oscillations in population size, including our favourite flour beetles. Even in the absence of external forces (such as predation) such oscillations are not uncommon, and are typically attributed to negative density dependence. As populations become more crowded, the growth rate drops, and this... Continue Reading →
Several years ago, Arun Prakash and Imroze Khan set up an ambitious experimental evolution study in the lab, infecting populations of flour beetles with the pathogen Bacillus thuringiensis (Bt). They found that different selection regimes led to the evolution of mutually exclusive immune responses – beetles either evolved better basal resistance to Bt, or immune priming... Continue Reading →
We are starting 2023 on a great footing, with a new paper reporting a lot of really nice work by Vrinda and Gaurav. For a long time we have been puzzled by seemingly maladaptive oviposition behaviours of female flour beetles faced with different resource options. By carefully manipulating egg allocation across resource patches, we were... Continue Reading →
Arun's paper reporting the detailed costs and benefits of evolved immune priming is now published! In an exciting earlier study, we had found that flour beetles exposed to the pathogen Bacillus thuringiensis adapted rapidly via the evolution of either immune priming or pathogen resistance. The new work – led by Arun (now at Edinburgh University)... Continue Reading →
Shantanu's work on female colour variation in the widespread, tiny damselfly Agriocnemis pygmaea is now out! Females of this damselfly (seen at the campus pond) come in two colors: red and blue, as well as a bunch of intermediate forms. We wondered whether these colours represent allelic forms, or ontogenic (age-related) change. From laboratory studies... Continue Reading →
Kruttika's work testing the impact of butterfly caterpillar microbiomes on growth and survival is published! This was a major collaborative effort with Krushnamegh Kunte, and very new kind of work for our lab. The results were puzzling because unlike patterns from other insects, butterflies seem to be just fine without their bacteria. But in conjunction... Continue Reading →
Rittik Deb and Ashwin Nair's paper on the gut bacterial communities of dragonflies is out! We sampled several species of dragonflies from different locations in India, and found that gut bacterial communities varied across host species, location, and season. For some of the dragonflies, we were also able to analyse gut contents, and found that... Continue Reading →
AdaptationLab 