The dynamics of fishery science development in the Belarus for 80 years, problems of market fish production and intensification ways are expounded. Raised the questions of economy of re- sources and next researches directions.
Influence of wheat grains slop on the development of aquatic organisms important as fish fodder in fingerling fish pond is investigated. It is proved that single discharge into the fingerling fish pond of 2 ton/ha of wheat grains slop in spring is more effective than using manure for zoo- plankton structure formation.
There has been analyzed current state of silver bream of the Kremenchuk reservoir. With the aid of cohort analysis, there were estimated fishing mortality, possible number, and biomass of commercial stock of this species for 2005–2006. There were modelled yields per recruits of silver bream using a Thompson and Bell type model.
The influence of amateur fishery on general and trade ichthyofauna Kahovska reservoir is determined. Fixed, that the volumes by the angling of separate protected kinds of fishes on mass come nearer to trade, and by quantity of the caught copies exceed them.
The possibility of usage the scale index, which was proposed for gold fish (Carrasius auratus gibelio Bloch), for roach slow-growing form identification was estimated. The scales Length-weight proportion are variable depending on place on body, so only scales placed above lateral line (N 12–23 counting from head) should be used.
Longstanding studies found that major ways of increasing efficiency of Chinese carps intro- duction into Kakhovka reservoir is optimization of their species structure by excluding hybrids from the stock and introduction into commercial harvest a selective catch of older-aged groups conjointly with meliorative harvest of clupeonella.
It was shown that rise in acidity of freshwater ecosystems and soils was caused by binding mineral components (mainly calcium and magnesium) by carbon dioxide and organic acids and their carryover to seas and oceans. Particularly actively this process goes in the zone with humid and cold climate because aggressiveness of carbon dioxide increases with temperature decrease. Speed of calcium pumping currently significantly increased due to increased content of sulphur in the biosphere. Thus, natural geological process of fresh waters acidification is intensified by acidic pollution of anthropogenic origin.
Analyze of change of structure of ichtyofauna of river Desna in limits of Ukraine in XX-th century and firsts years XXI century carried out. Most species structure of ichtyofauna of this river is presented.
The research is dedicated to hydro-biologic and hydro-chemical state of wintering, spawning and feeding ponds including the influence of some indicators on physiological state of breeding fish during spawning
Influencing of carp planting stock weight at fattening ponds stocking, density of larvae and one-year on the size of market fish, physical and chemical indexes, and presence of edible parts, calorie content of carcasses is studied.
The preliminary estimate of several preparations for artificial stimulation of maturation of the fish sexual product is sown. The insignificant advantage of traditional hypophysial injecting in females of silver and bighead carps in comparing with existing releasing–hormones.
The scheme of crossing, the desirable type, the main of targeted standards and the methods of approaching to breeding of the new type of the mirror of common carp of Ukrainian frame breed is shown. The dynamics of numbers of the pedigree core of the breeders in the main basic fish-farms is presented.
There are presented results of studies on evaluation of development of crossed Ukrainian-Ro- manian carps on early stages of ontogenesis after thermoshock effect. It was observed an increase of resistance of thermoshocked embryos against unfavorable environmental factors. It was shown а possibility for forecasting heterosis effect in more heatresistant embryos.
The article are consist the results of introduction of enzymic preparation of “Magrozim” in the ration of larvae of catfish from the first days of transition to the exogenous feed. It is set that the explored preparation gives most fish-breeder and biological effect at the dose of introduction 1 kg of preparation on 1 tone of the mixed fodder.
There are presented data on quantity of separate populations of T- and quantity of B-lymphocytes in blood of 2-year old Lubin frame carps and Amur wild carps and their hybrid forms grown at stocking density of 2500 and 1000 fish/ha. Differences in quantity of T- and B-lymphocytes and their activity in fish of studied genotypes are insignificant. It was found a significantly higher quantity of T-lymphocytes and lower quantity of B-lymphocytes in blood of fish of all genotypes grown at lower stocking density.
The complex of problems of fishery devel- opment in Russian Federation is presented. In modern terms the creation of competitive fish industry is determined by efficiency of innova- tive home and foreign developments application. Especially it is important in aquaculture.