Friday, April 09, 2010
Only Known Living Population Of Rare Dwarf Lemur Found
Researchers have discovered the world's only known living population of Sibree's Dwarf Lemur, a rare lemur known only in eastern Madagascar. The discovery of approximately a thousand of these lemurs was made by Mitchell Irwin, a Research Associate at McGill University, and colleagues from the German Primate Centre in Göttingen Germany; the University of Antananarivo in Madagascar; and the University of Massachusetts.
The species was first discovered in Madagascar in 1896, but this tiny, nocturnal dwarf lemur was never studied throughout the 20th century. Following the destruction of its only known rainforest habitat, scientists had no idea whether the species still existed in the wild - or even whether it was a distinct species. The study will be published in the current issue of the journal Molecular Phylogenetics and Evolution.
Irwin first observed dwarf lemurs at Tsinjoarivo, Madagascar, in 2001, shortly after setting up a long-term rainforest research site. "Even then we knew something was unusual about them," Irwin said. "Instead of the rainforest species we expected to see, our lemur resembled the species known from dry western forests, only it was much larger."
In 2006, Irwin began collaborating with Marina Blanco, University of Massachusetts at Amherst who trapped dwarf lemurs at several sites throughout Tsinjoarivo. This work led to the further surprise that two morphologically distinct dwarf lemur species were present, living side-by-side. Further work by geneticist Linn Groeneveld, German Primate Center confirmed the existence of the more common Crossley's dwarf lemur, and the elusive Sibree's dwarf lemur.
Full story here.