Topmouth gudgeon Pseudorasbora parva: a side effect of fish stocking.

摘要: The topmouth gudgeon Pseudorasbora parva is an eastern-Asian cyprinid species, which in relatively short time has colonised nearly the whole Europe. In some regions it become a notable reproduction success and significantly disrupted native ecosystems. Such fast expansion most probably caused by uncontrolled transfers of stocking fish, mainly Asian carps, i.e., Ctenopharyngodon idella, Hypophthalmichthys spp. case P. invasion demonstrates risk translocations as well urgent need more caution prevention order to avoid further such unexpected guests.