РАЗВИТИЕ ОСНОВНЫХ СИСТЕМ ОРГАНОВ СУДАКА STIZOSTEDION LUCIOPERCA (PERCIFORMES: PERCIDAE) В РАННЕМ ОНТОГЕНЕЗЕ

Abstract

The article describes the features of developing major organ systems in pre-larvae and larvae of pikeperch at different stages. In the period of transition to exogenous feeding the nervous, musculoskeletal and digestive systems in pre-larvae body were the most developed. At the same time, cardiovascular, respiratory, excretory systems developed slower. In the beginning of active feeding the digestive, nervous and musculoskeletal systems in pike perch larvae were completely developed: there emerged taste buds, teeth in the oral cavity, were formed cartilaginous tissues, particularly at the skull base. In the cardiovascular system of larvae there continued process of differentiating the heart valves. The research results showed uneven development of main organ systems in pike perch pre-larvae and larvae, which is connected to the development of swim bladder and digestive system during transition to active feeding.