| 
1997-2012 | 
Ekologia, registered in Current Contents Connect (TM) database Slovak Academy of Sciences, Slovak Academic Press Editorial Board Member  | 
| 
1991-1999 | 
Biologia, registered in Current Contents Connect (TM) database  Slovak Academy of Sciences, Slovak Acadenic Press Editorial Board Member  | 
| 
1989-2012 | 
BIOS Aristotle University of Thessaloniki, Greece Editorial Board Member  | 
| 
1991-2002 | 
Environmental Biology of Fishes, registered in Current Contents Connect (TM) database Kluwer Academic Publishers Advisory Editor  | 
| 
1992-1997 | 
Acta Zoologica Universitatis Comenianae Comenius University, Bratislava Editorial Board Member  | 
| 
1990-1991 | 
Acta Facultatis Rerum Naturalium Universitatis Comenianae - Zoologia Slovak Pedagogical Publishing, later Comenius University, Bratislava Editorial Board Member  | 
| 
1971-1979 | 
Akvarium a Terarium Orbis Praha, later Panorama, Praha Editorial Board Member  | 
| 
1996-2020 | 
Scientific Board of Natural History Museum of Slovak National Museum member  | 
| 
1990-1998 | 
Scientific Board of Institute of Zoology, Comenius University member  | 
| 
1991-2000 | 
Scientific Board of Faculty of Natural Sciences, Comenius University member (1991-2000), chairman (1991-1994)  | 
| 
1990-1993 | 
Scientific Board of Institute of Zoology and Ecososology, Slovak Academy of Sciences external member  | 
| 
1991-1992 | 
Scientific Collegium for Biology of Organisms, Populations and Communities, Czechoslovak Academy of Sciences member  | 
| 
1990-1999 | 
Scientific Collegium for Biological and Ecological Sciences, Slovak Academy of Sciences member (1990-1999), vice-chairman (1990-1995)  | 
| 
2000-2020 | 
Advisory Board of the Director of the Slovak Environment Agency for Nature Protection member  | 
| 
1999-2020 | 
Advisory Council to the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) member  | 
| 
1997-2010 | 
Joint Committee for Doctoral (PhD) Studies in Zoology, Comenius University member  | 
| 
1997-2020 | 
Section for Animal Introductions of the Advisory Board of the Slovak Environment Agency for Fauna Protection member  | 
| 
1996-1998 | 
Commission for Doctoral (PhD) Dissertations Defence in Zoology, Institute of Zoology, Slovak Academy of Sciences member  | 
| 
1996-2020 | 
Curatorium of the Slovak National Museum in Bratislava member  | 
| 
1994-xxxx | 
Group for Fish Protection, Slovak Environment Agency member  | 
| 
1991-1995 | 
Scientific Grant Agency (VEGA) Commission for Biological and Environmental Sciences member  | 
| 
1991-2001 | 
Committee for Doctoral (PhD) Dissertations Defence in the Field of Zoology member  | 
| 
1991-1995 | 
Working Group for Assessing the Competence of University for PhD Studies in the field of Biology - Zoology chairman  | 
| 
1990-1991 | 
Expert Grant Board for Biological and Ecological Sciences of the Slovak Academy of Sciences member  | 
| 
1990-2001 | 
Commission for Defense of Doctoral Dissertations in Zoology, Faculty of Natural Sciences, Charles University member  | 
| 
1977-1985 | 
Commission (later Section) for Evaluation of Fishing Trophies, General Committee of the Slovak Fishermen's Association, 
Zilina member  | 
| 
1991-1994 | 
Head of the Biological Section Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia  | 
| 
1991-1994 | 
Vice-Dean for Foreign Relations Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia  | 
| 
1990-1991 | 
Deputy Head of the Department of Zoology Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia  | 
| 
1991-2010 | 
Guarantee of PhD Study Program - Biology Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia  | 
| 
1998-1999 | 
 
Guarantee of Bachelor Study Program - Biology  |