International audienceThe symposium was organised by the Department of Animal biology I of Madrid's complutense university and the society to save the sturgeon. More than forty delegates from France, Germany, Greece, Hungary, Poland, Portugal, Romania, Russia, Slovakia, Spain, Ukraine and the USA attented and contributed to the scientific discussions during the sessions. The main objectives of the Symposium were to bring together those concerned with or working on conservation of A. sturio, and to produce a book of proceedings, including an overview of the present knowledge on the subject