Morphofunctional features of organs of Volga lamprey

With habitats shrinking (e.g. due to construction projects that prevent access areas upper the Volgograd Reservoir), changes in environment, or illegal fishing some areas, there is registered a sharp decrease of population Volga lamprey. Studying histomorphological structure this species has significant impact on prediction and assessment state their internal organization. Problems such sections as comparative embryology histology lamprey have been poorly studied, which complicates research. The aim research study morphofunctional features organs Caspian object (Volga) (Caspiomyzon wagneri), endemic Sea basin. tissues were treated for accordance with methods generally accepted histology. Microscopy fixed, stained preparations was performed using light microscope immersion. Lampreys differ from other fish. gill apparatus, skin structural features, digestive system organs, excretory reproductive systems considered. most intense pathological processes characteristic gills, organ actively contacts environment. studied showed signs epithelial hyperplasia, vascular disorders, change shape lamellae.