О биологической структуре ихтионейстона Чёрного моря

Abstract

В составе ихтионейстона Черного моря можно выделить ихтионейстон неритический, или прибрежный, и ихтионейстон открытого моря. В зависимости от связи рыб на ранних стадиях развития с приповерхностным слоем (0—50 см) выделены голоихтионейстон, мероихтионейстон, ксеноихтионейстон и, наконец, никтоихтионейстон.The Black Sea ichthyoneuston may be divided into the neritic, or littoral, and the Ichthyoneuston of the open sea. Depending on the relation of fishes on early stages of their development to the superficial water layer (0-50 cm), the following neuston groups are outlined: holoichthyoneuston (fishes that all their life normally spend on the border between air and water), Ineroichthyoneuston (fishes that spend in the ichthyoneuston only a part of their life; this group, however, form the main ichthyoneuston biomass, as surfacing is necessary for their normal development), Xenoichthyoneuston (accidentally occurring species), and nektOichthyoneuston (large larvae surfacing at the night time, and fries of some fishes).