University of Groningen ecologist
made the cover of the scientific journal Physiological and Biochemical Zoology with his study of Bermudian bluebirds. His work shows the vulnerability of this iconic island species, which graces the two-dollar note in Bermuda.
‘This project was a follow-up from my PhD project, which compared island and continental birds more generally’, Matson explains. He wanted to better understand the differences between the ordinary bluebird living on the American continent and the island population.
Other researchers have used genetics to show the island population was established just a few hundred generations ago, which is not very long in term of evolutionary time. Yet Matson showed the birds on Bermuda are lighter weight than their continental cousins and have longer wings. ‘That’s peculiar because island birds are typically larger than continental counterparts and would be expected to have shorter wings.’
He also found increased mortality of island bluebird chicks. ‘That may be caused by seasonal dry spells, but recently introduced predators like feral cats and recently introduced competitors like house sparrows may also play a role. Furthermore, the use of insecticides may affect the birds’ diet.’
Matson’s advice to Bermudans is to counteract chick mortality by providing and maintaining nest boxes. ‘That’s been done in America when bluebirds were on the decline, and it worked well.’ A press release covering the project resulted in an
in the Bermudian newspaper The Royal Gazette. ‘That was really my aim in seeking publicity for my paper. The Bermudans care a lot about their bluebirds, so I wanted them to hear about my work.’
In Groningen, where Matson has worked since 2006 (and where he got a NWO Veni grant in 2008), his focus is now on homing pigeons. ‘I have a flock in the Linnaeusborg aviary, which I study as a comparison for work done in the field. With fieldwork, you often only get small windows of time for sampling each year, but my pigeons can be studied and sampled regularly throughout the year.’
Matson aims to combine fieldwork and lab work. ‘That is the style of the group I work in, led by Irene Tieleman, and it is a style that really suits me. Fieldwork is exciting, but lab work is stimulating as well It gives you the opportunity to work out more details on physiology.’
K.D. Matson, R.A. Mauck, S.E. Lynn, and B.I. Tieleman, “Island Life Shapes the Physiology and Life History of Eastern Bluebirds (Sialia sialis),” Physiological and Biochemical Zoology 87(1), January/February 2014.
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