This is a presentation given by Rina Mandimbiniaina at #ICCB2017 It is based on a paper by Mahesh Poudyal, O. Sarobidy Rakotonarivo, Neal Hockley, James Gibbons, Bruno S. Ramamonjisoa, Rina Mandimbiniaina, Alexandra Rasoamanana, Nilsen S. Andrianantenaina, Julia P.G. Jones