Stefan Kazakov Институт по биоразнообразие и екосистемни изследвания, Българска Академия на Науките Institute of biodiversity and ecosystem research, Bulgarian Academy of Sciences Website Type of organization: school_university/research/institute Current Events Upcoming Events Past Events There are currently no events. There are currently no events. 22 May 22 May - 22 May World Fish Migration Day 2022 2022-05-22 @ 10:00 (GMT+0000) - 2022-05-22 @ 17:00 (GMT+0000) Ogosta dam, Montana, Bulgaria Fish and/or river monitoring demonstration