PHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN CASPIAN SPRAT (CLUPEONELLA DELICATULA CASPIA SVETOVIDOV) DURING DIFFERENT PERIODS OF ANNUAL CYCLE

The article considers studying the physiological and biochemical parameters of common sprat (Clupeonella delicatula caspia Svetovidov) taken in western part Middle Caspian Sea at different periods annual cycle. There were studied species pre-spawning state, beginning spawning, feeding stage pre-wintering stage. 
 In fish muscle tissue content water-soluble protein total lipids was determined. period, male recorded a positive correlation (p < 0.05) between weight fishes, fishing length muscles (r = +0.5206) +0.5039), respectively. females no statistically significant dependence size-weight lipid recorded, which is probably due to fact that their bodies spent for energy needs, greater extent than males - generative function. comparative aspect, differences period found. At decrease noted associated with an increase consumption sweeping out sexual products. During characterized by intensive accumulation reserves; increased increasing individuals. pre-winter stabilization reserves necessary ensure normal existence subsequent stages