С целью изучения микрофлоры леща оз. Виштынецкого, исследованием которого
 ранее никто не занимался, произведен микробиологический анализ его кожи, жабр и
 внутренних органов. Обнаружено доминирование в бактериоценозе Виштынецкого
 бактерий рода Bacillus. Результаты наших исследований были сравнены с данными по
 микрофлоре Куршского залива, полученными сотрудником АтлантНИРО...

The distribution and reproductive success of fish were examined in Dutch soft waters of varying pH. In total, 20 fish species were encoun­ tered. The lowest pH-values at which fish species were observed varied remarkably. Umbra pygmaea and Tinea tinea appeared to be extremely acid tolerant and occurred in waters with pH-values below 4.0. Abramis brarna, Cyprinus carpio, E’sox iucius, Misgumus f...

During the present investigation, 23 species of fish in Lithuanian inner waters were examined for helminth parasites. Of these, 63 taxa helminths – 56 Plathyhelminthes, five Nematoda, and two Acanthocephales found. Monogenea Gyrodactylus truttae was registered Lithuania first time. Metacercariae flukes Diplostomum sp., Posthodiplostomum cuticula, Tylodelphys clavata found highest number host sp...