Tuesday, October 7, 2014
Tuesday, August 20, 2013
Friday, July 26, 2013
Tuesday, July 16, 2013
Dan Scantlebury’s paper on Madagascan diversification was just published in the Proceedings of the Royal Society B. The cover features Dan’s photo of an undescribed species of Pareodura licking its eye. Congratulations to Dan on a job well done. Here’s the abstract of Dan’s paper: “The evolutionary origins of Madagascar’s biodiversity remain mysterious despite the fact that relative to land area, there is no other place with consistently high levels of species richness and endemism across a range of taxonomic levels. Most efforts to explain diversification on the island have focused on geographical models of speciation, but recent studies have begun to address the island’s accumulation of species through time, although with conflicting results. Prevailing hypotheses for diversification on the island involve either constant diversification rates or scenarios where rates decline through time. Using relative-time-calibrated phylogenies for seven endemic vertebrate clades and a model-fitting framework, I find evidence that diversification rates have declined through time on Madagascar. I show that diversification rates have clearly declined throughout the history of each clade, and models invoking diversity-dependent reductions to diversification rates best explain the diversification histories for each clade. These results are consistent with the ecological theory of adaptive radiation, and, coupled with ancillary observations about ecomorphological and life-history evolution, strongly suggest that adaptive radiation was an important formative process for one of the most species-rich regions on the Earth. These results cast the Malagasy biota in a new light and provide macroevolutionary justification for conservation initiatives.”
Sunday, June 23, 2013
I am very happy and proud to announce that Julienne Ng successfully defended her PhD dissertation on June 14th. Julienne put together an excellent thesis on the evolution of Anolis distichus, and its spectacularly polymorphic dewlap in particular. Julienne is the the Glor Lab’s first PhD and she has set a high standard for those to follow.
Monday, June 17, 2013
Check out the article about Guigy and his research in The Buzz!
Monday, April 29, 2013
Our senior undergraduate, Ben Desch, will be presenting his Honours thesis “Phylogeography and population structure of the Anolis chlorocyanus species group” this Wednesday at 2:30pm in Hylan 305. Everyone is welcome, so come and support Ben to hear the exciting results from his work in the lab this last year!
Sunday, April 28, 2013
We’re going to change directions a bit and talk about some QTL studies of Heliconius.
Baxter, S. W., S. E. Johnston and C. D. Jiggins 2009. Butterfly speciation and the distribution of gene effect sizes fixed during adaptation. Heredity 102(1): 57-65 [doi]
Papa, R., D. D. Kapan, B. A. Counterman, K. Maldonado, D. P. Lindstrom, R. D. Reed, H. F. Nijhout, T. Hrbek and W. O. McMillan 2013. Multi-Allelic Major Effect Genes Interact with Minor Effect QTLs to Control Adaptive Color Pattern Variation in Heliconius erato. Plos One 8(3) [doi]
Sunday, April 21, 2013
Lab meeting discussions this semester have moved from mice to flycatchers to sticklebacks. Guiggy and I are going to end the semester with a bang with papers on Heliconius butterflies this week and the next. For this week, we’ll be discussing the following two papers:
Dasmahapatra KK et al. 2012 Butterfly genome reveals promiscuous exchange of mimicry adaptations among species. Nature 487: 94–98 [doi]
Brower, A. V. Z. 2013. Introgression of wing pattern alleles and speciation via homoploid hybridization in Heliconius butterflies: a review of evidence from the genome. Proceedings of the Royal Society B: Biological Sciences 280 [doi]
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