A histochemical study of acid mucopolysaccharides in the gills of the eel Anguilla anguilla (L.)

In this histochemical study the occurrence and distribution of acid mucopolysaccharides in the gills of the eel Anguilla anguilla (L.) have been determined and their differentiation into acid mucopolysaccharides containing carboxyl groups and those containing sulphate groups has been carried out

Tissular respiration of liver and kidney from bream Abramis brama (L.) in reversible anaesthesia

Investigations were performed on changes of respiration intensity of kidney and liver of bream resulting from reversible anaesthesia. Each fish was subjected to test of 1.8 V direct current during 5 minutes remaining in homogenous electric field. Reversible anaesthesia increased the intensity of respiration of both organs. The investigations proved also the existing correlation between the weight of body and the extent of metabolic changes of liver and kidney in reversible anaesthesia. Sensitivity of fish to current test decreased in relation to increase of its weight

Seasonal and daily variations of respiratory metabolism of liver and kidney of bream Abramis brama (L.)

The investigations related to seasonal and daily variations of oxygen consumption by liver and kidney of bream with consideration of sex. The results obtained indicate to more intensive respiratory metabolism in autumn in comparison to summer season. Highest metabolic intensity ascertained at males during autumn season. Daily variations became also very distinct. Increased respiratory metabolism in liver and in kidney was apparent during the evening; highest respiratory metabolism noted at males during evening

Water temperature effects on cardiographic changes in Salmo trutta (L.)

Investigations upon the lability of frequency and strength of heart systoles in Salmo trutta (L.) influenced by water temperature changes were carried out. There was showed the considerable lability of heart work when artificially decreasing and then increasing water temperature

Method of cardiography in fishes under aquarium conditions

There was worked out the method or studying heart functional changes in fish in aquarium experiments. In consequence of the operation a rubber balloon was placed in immediate heart neighbourhood and in connection with Marey&prim

The effect of sulphates and phosphates (industrial wastes) on the mucopolysaccharides content of the gills of the eel Anguilla anguilla (L.)

Industrial wastes, the main components of which were sulphates and phosphates, induced a decrease in the intensity of staining reactions for mucopolyaaccharides (MPS) in the gills of eels. The changes in the MPS content were positively correlated with the vital changes in fishes kept in waste water with an increased sulphate content at a raised pH value

Changes of tissular respiration of bream Abramis brama (L.) adapted to aquarium conditions

Studies on oxygen metabolism dynamics of liver and kidney of bream Abramis brama (L.) from Zalew Szczeciński prove that adaptation period of bream transferred into aquarium conditions is characteristic for increased respiration of liver and kidney during first days of adaptation. A tendency for respiratory metabolism in liver is noted to stabilize from 6th day and in kidney from 7th day of adaptation to aquarium conditions

Heart conditioned response in Salmo trutta (L.) In the field of inductive current

Heart conditioned responses in Salmo trutta (L.) in the field of inductive current were investigated by means of the cardiographic method. High excitability grade was proved. Heart responses appeared after the use of subthreshold stimuli for smooth muscles

Effect of crude oil on tissue respiration of eel, Anguilla anguilla (L.) kept in water at 18° and 24°C

The paper describes studies on the effect of the Kamień Pomorski crude oil on tissue respiration of eel, Anguilla anguilla (L.). The crude oil concentration of 250 mg/l was tested at 18 and 24°C, the fishes being exposed for 5 hrs and 6 days. A very considerable reduction in eel tissue respiration was observed. Under the experimental circumstances, the oxygen uptake was at its minimum and maximum in gills and liver, respectively