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The effect of dietary inclusion of amaranth meal on hematology and blood biochemistry, of rainbow trout Oncorhynchus mykiss was examined. The fish (mean length 35.2 ± 0.6 cm; mean weight 524.8 ± 28.5 g) were divided into three groups: a reference group (RF) fed commercial trout pellet and two experimental groups (EF5 and EF10) fed feeds containing 5.0% and 10.0% of amaranth meal respectively. Determined...
This article contains results of a study the objective of which has been to identify the effect of socio-economic characteristics of consumers on: frequency of fish consumption, preferred form and place of fish purchase. Additionally, the degree to which the above properties affected fish purchase was estimated. Moreover, subjective opinions of consumers on the circumstances of fish consumption were...
The aim of the this study was the to assessment of use the amaranth meal in feed for rainbow trout Oncorhynchus mykiss. Two experimental feeds contained 5.0% and 10.0% of amaranth meal were prepared and compared to reference diet (commercial feed) containing similar amountsof specific nutrients. Initial body wet weight of experimental trout was 524.8±28.5 g and mean lengthof 35.2±0.6 cm. Feed was...
A rearing experiment was focused on the effect of the type and diet composition on the European grayling (Thymallus thymallus L.) eggs quality, expressed by the embryos survival to the eyed-egg stage. Three feeding variants were analyzed. Spawners from group I were fed exclusively trout feed, group II received trout feed with maggots and fish in group III foraged on natural feed. A statistically significantly...
The objective of this study has been to determine the chemical composition of fish which are used to make traditional dishes in Warmia and Mazury. The material for our analyses consisted of lake fish (roach, tench, pike, vendace, burbot) and cultured fish (carp) from north-eastern Poland. The highest protein content was found in muscles of vendace (19.2 ÷ 21.9%) and roach (20.5%), and the lowest one...
The aim of this study was to test the possibilities of rearing European grayling (Thymallus thymallus L.) under controlled conditions to the autumn fingerlings stage. Experimental fish originated from the farmed broodstock. Juvenile graylings were reared in plastic tanks with a bottom area of 1 m² and a depth of 0.5 m. Dan-Pel 1656 (Dana Feed) feed was used in the experiment. The mean body weight...
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