Abstract
Results of work have been summarized on use of some morphofunclional indices at fish health control in aquaculture. Their use helps efficiently and intravitally estimate and reject sick specimen having a low immune status. It has been revealed that the most important but labour-intensive indices are hematological ones which can be changeable at deseases of various nature and may be used at appraisal of stress-response. Indices of hemoglobin content, erythrocytes and leukocytes numbers, erythropoeitic activities, leukocytal formula as well as the absolute quantity of different leukocytes groups are informative characteristics for efficient control. The express-method of fish stress aiagnostics has been developed and worked through with application of gluco-and multisticks for estimation of 10 biochemical parameters in mucus and of glucose in blood within 2 or 3 minutes. It has bees shown that the level of a non-specific resistance and adaptive possibilifies of some specimen affect heterogeneity of indices values determined what allows to reveal the part of weakened specimen and to estimate necessity of correcting activities as well as to predict the result of the situation formed with reared fish.
Highlights
Great attention is paid to aquaculture development in the Russian Federation
The near functional relationship of fish blood with metabolic processes in organism allows to reveal changes connected with breach of piscicultural-normative requirements of rearing biotechnic, deterioration of water quality as well as with stress situations formed at manipulation
We suggest to bring into use with «physiological norm», the conception of «technological norm» which supplements the size-age standard and is attached to fish cultivation technology
Summary
Great attention is paid to aquaculture development in the Russian Federation. Stress factors lead to decrease of non-specific organism’s resistance, receptivity to opportunistically pathogenic infestants which result mostly in chronic desease leading to decrease of growth rate and even to fish death [7,8,9]. In these circumstances, clinical signs would not always develop, but the delay of prophylactic measures and therapy leads to loss of fish production [10,11]
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