Permits
Orsinigobius croaticus is legally protected by law as an
endangered taxon in Croatia (Official Gazette of the Republic of
Croatia, 2016). In addition, it is an endemic species with very limited
distribution. As a result, the number of individuals employed in the
laboratory experiments was kept to a minimum (less than 15) to prevent
possible effects on the natural population of this species. The sampling
by electrofishing for scientific purposes in the natural habitat was
approved by the Ministry of Agriculture (permit number
525-13/0545-19-2), while all laboratory experimental protocols were
approved by the Bioethics and Animal Welfare Committee of the Faculty of
Science, University of Zagreb (permit number 251-58-10617-21-147).