Tilhi a76 Oulu, Syynimaa 2.2. klo 13.20 /EAa Esa Aalto Student University of Oulu, Department of biology tel. +358 - (0)40 865 2926 addresses: Tirolintie 2B 204, 90530 Oulu (15.1.-30.4. , 10.9.-15.12.), Korpelantie 153, 42800 Haapamäki (1.5.-10.9. , 15.12.-15.1.) e-mail: esaaalto at paju.oulu.fi, esaalto at hotmail.com