scholarly journals Purification and properties of biologically active rainbow trout testis protamine mRNA.

1976 ◽  
Vol 251 (5) ◽  
pp. 1455-1463 ◽  
Author(s):  
L Gedamu ◽  
G H Dixon
Keyword(s):  
Rainbow Trout ◽  
Biologically Active ◽  
Purification And Properties

scholarly journals Morphometric estimation of Rainbow Trout for feeding Aller Aqua and Aquafeed Fischfutter

2019 ◽  
Vol 21 (90) ◽  
pp. 21-25
Author(s):  
I. Y. Bobel ◽  
J. I. Pivtorak
Keyword(s):  
Rainbow Trout ◽  
Growth And Development ◽  
Natural Waters ◽  
The Body ◽  
Biologically Active ◽  
Predatory Fish ◽  
Main Task ◽  
Active Growth ◽  
Alternative Source ◽  
Vital Functions

Scientific research was based on certain morphometric indices of various trout groups, which allows us to draw conclusions about the effectiveness of fish feeding with Aller Aqua and Aquafeed Fischfutter. The main task of trout farming is to obtain a commodity trout for the shortest possible time. In this case, the intensity of the growth of rainbow trout leads to the absence of feed, which is used in its cultivation. For active growth and development of fish, a high level of protein in the stern is required, which should be used specifically for plastic exchange, and not for the energy organism. Inner-shell left arms inviting them to optimize their chemical composition of feed, but they are energetic, perform in the body of fish a number of other vital functions: structure, regulatory and others, and serve as precursors of many biologically active substances that have validity and hormones. While growing rainbow trout, it is necessary to take into account its phenotypes of characteristics, which show that the level of breeding stability of the fish population and determines the attractiveness of products on the consumer market. The composition of feed primarily affects the metabolism of fish, which determines the intensity of their growth and development, and is also realized by trout. Fodder for the cultivation of salmon fish are made from industrial fishing waste. An economically viable alternative source of raw materials serves vegetal products (oils, sunflower proteins, soybeans, maize glutenin, and others), which, however, do not have a forage base of predatory fish appearing in natural waters. At present, the influence of different compositions on the morphometric and physiological biochemical characteristics of the culture, especially salmon, is actively studied, but these problems remain unchanged. The dynamics of the intensity of growth and development of rainbow trout is ensured by the feeding regime of fish. The publication of the published differences in the nature of the massif and the flow of rainbow trout species, which ensure the use of Aller Aqua and Aquafeed Fischfutter mixed fodders.

Relationship between hepatic deiodination of thyroxine and early oocyte development in rainbow trout, Oncorhynchus mykiss

1999 ◽  
Vol 77 (3) ◽  
pp. 509-513 ◽  
Author(s):  
Sylvia M Ruby ◽  
J Geoffrey Eales
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Gonadosomatic Index ◽  
Stage Iv ◽  
Biologically Active ◽  
Stage Ii ◽  
Oocyte Development ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Yolk Globule ◽  
Thyroidal Status

We examined the relationship between five stages of ovarian growth and development and hepatic microsomal thyroxine (T4) deiodinating activity in rainbow trout, Oncorhynchus mykiss, held in the laboratory at 11.5°C. Thyroxine outer-ring deiodination (T4ORD) activity, which forms biologically active 3,5,3'-triiodothyronine (T3), was low when the gonadosomatic index (GSI = (ovary mass X 100) / body mass) was below 0.2 (stage I, previtellogenesis), but rose sharply between GSI values of 0.2 and 0.3 (stage II), when oocyte Balbiani activity, RNA synthesis, and endogenous vitellogenesis were maximal. Hepatic T4ORD activity was again low during exogenous vitellogenesis at GSI values of 0.3-12, which correspond to stages III-V. Hepatic T4 inner-ring deiodination (T4IRD), which forms biologically inactive 3,3',5'-triiodothyronine, was detected only at stage II. Plasma T3 concentrations were significantly higher at stage II than at stage IV (primary yolk globule formation). Our data indicate changes in systemic thyroidal status at stage II and are consistent with a role for T3 in early oogenesis in trout. Enhanced hepatic T3 production at the late Balbiani stage may be required for oocyte development.

scholarly journals Rainbow trout proteins as potential source of biologically active peptides

2015 ◽  
Vol 21 (3) ◽  
pp. 322-327
Author(s):  
Justyna Borawska ◽  
Monika Pliszka ◽  
Monika Świtaj ◽  
Małgorzata Darewicz
Keyword(s):  
Rainbow Trout ◽  
Biologically Active ◽  
Active Peptides ◽  
Potential Source ◽  
Biologically Active Peptides

scholarly journals STUDY OF THE INFLUENCE OF BIOLOGICALLY ACTIVE ADDITIVE USING MICROALGAE ON THE GROWTH AND MICROFLORA OF RAINBOW TROUT

2019 ◽  
Vol 3 (333) ◽  
pp. 39-47
Author(s):  
B. K. Zayadan ◽  
◽  
N. R. Akmukhanova ◽  
D. N. Matorin ◽  
A. K. Sadvakasova ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Biologically Active ◽  
Active Additive

Evaluation of the composition of essential fatty acids in the tissues of rainbow trout (Oncorhynchus mykiss) grown in closed water supply units

2021 ◽  
Vol 325 (4) ◽  
pp. 495-501
Author(s):  
E.A. Zykina ◽  
M.V. Gurin
Keyword(s):  
Fatty Acids ◽  
Rainbow Trout ◽  
Water Supply ◽  
Oncorhynchus Mykiss ◽  
Fish Oil ◽  
Essential Fatty Acids ◽  
The Body ◽  
Biologically Active ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Aquaculture Products

Recently, the task of artificial cultivation of especially valuable fish species in aquaculture has become more and more urgent. The value of salmon fish, and in particular rainbow trout Oncorhynchus mykiss (Walbaum, 1792) available for breeding, is largely determined by the high content of biologically active essential and polyunsaturated fatty acids of the group ω-6 and ω-3, necessary for vital activity and not synthesized by the human body. Since the natural stocks of many popular fatty fish have decreased, farmed fish can help meet consumer demand for this product. Based on this, the assessment of the content of the main ω-6 and ω-3 fatty acids in the fat of rainbow trout grown in closed-loop water supply installations (USV) was made. The fat was extracted from the fish by thermal method with further distillation by supercritical fluid extraction on the SFT-150 unit. The ratio of fatty acids in the fish oil sample was determined using the Chromatek-Kristall-5000 M hardware and software complex. The results obtained were compared with the standard for salmon fish oil “Aquaculture products” and “Wild fish”. It is established that trout cultivated in the UZV in the Penza region, in terms of the content of the main essential fatty acids, is not inferior to the quality indicators of the standard in terms of the requirements for salmon fish of “Aquaculture products”. In fish, all essential fatty acids are present in sufficient quantities, the ratio of ω-6 to ω-3 is 2.6:1, which indicates a high nutritional value of the product and allows it to be used in human food to provide the body with essential fatty acids, as well as a raw material for obtaining therapeutic and preventive products.

Morphometric parameters of rainbow trout when the use of probiotic feed additive Enzimsporin

2020 ◽  
pp. 54-64
Author(s):  
Yu. Yesavkin ◽  
A. Zhigin ◽  
A. Maksimenkova ◽  
S. Grikshas ◽  
A. Pavlov
Keyword(s):  
Rainbow Trout ◽  
Drug Dose ◽  
Morphometric Parameters ◽  
Biologically Active ◽  
Feed Additive ◽  
Control Group ◽  
Minimum Height ◽  
And Control ◽  
Spore Forming Bacteria ◽  
Practical Recommendations

The main objective of commercial trout farming is to grow fish in the shortest possible time and with minimal costs, while the most important factor for effective cultivation is the completeness of feeding. The study of the effectiveness of the use and influence of biologically active additives on growth, development and product quality is the basis for practical recommendations for the use of biologically active substances in compound feed for rainbow trout. Enzimsporin is a feed probiotic additive for optimizing the digestive processes, increasing the productivity and livability of fi sh and contains a complex of spore-forming bacteria of the genus Bacillus. The purpose of the research was to evaluate the influence of the probiotic feed additive Enzimsporin on the morphometric parameters of rainbow trout when it is reared in cages. As the main diet, the production feed for commercial trout cultivation LimKorm 42/17 has been used. In the other two versions of the experiment the addition of Enzimsporin in the amount of 0,5 g/kg and 1,0 g/kg of feed has been added to it. As the result of the research, the tendency of differences in the indices of large-headedness, maximum and minimum height, and body thickness between the experimental and control groups of rainbow trout has been revealed. There were statistically significant differences in the indices of the length of the intestine and stomach, and the significant increase in the index of filling the gastrointestinal tract in experimental trout compared to the control group. The doubling of the drug dose resulted in the statistically significant increase in the feed consumed in variant 2 (1 g/kg of feed) compared to variant 1 (0,5 g/kg of feed). The drug Enzimsporin contributed to the increased appetite of fi sh and the intensity of the metabolism. Other morphophysiological parameters were within the normal range and did not diff er significantly. It has been shown that Enzimsporin in the composition of compound feed (0,5–1,0 g/kg of feed) is effective for feeding rainbow trout.

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