scholarly journals Factors Affecting Fin Damage of Farmed Rainbow Trout

2015 ◽  
Vol 38 (1) ◽  
pp. 61-71 ◽  
Author(s):  
Aleksandar Cvetkovikj ◽  
Miroslav Radeski ◽  
Dijana Blazhekovikj-Dimovska ◽  
Vasil Kostov ◽  
Vangjel Stevanovski
Keyword(s):  
Regression Analysis ◽  
Rainbow Trout ◽  
Water Temperature ◽  
Production Systems ◽  
Stocking Density ◽  
Fish Welfare ◽  
Factors Affecting ◽  
Pectoral Fins ◽  
Main Factors ◽  
Trout Farms

Abstract The aims of this study were to determine the influence of the factors affecting fin damage under different rainbow trout production systems and to compare the findings with the known experimental reports. The study was based on a questionnaire that included information about the main factors i.e. oxygen level in exit water, water temperature, stocking density, daily feed ration, number of meals and grading frequency on seven rainbow trout farms. Standard multiple regression analysis, based on a previously published fin damage dataset, was used to assess the relationship between the level of fin damage per fin and the factors. Daily feed ration received the strongest weight in the model for the caudal, anal and both pectoral fins, whereas number of meals received the strongest weight in the model for both pelvic fins. Grading frequency received the strongest weight only in the dorsal fin model. Lower levels of daily feed ration and number of meals combined with higher water temperature increased the level of fin damage, whereas stocking density had no effect. The results conform to the experimental research on fin damage in rainbow trout. The research model contributes to the overall assessment of fish welfare and the regression analysis used in this study could be used on rainbow trout farms to evaluate the effect of the main factors on the level of fin damage.

Stocking density practices of commercial UK rainbow trout farms

Aquaculture ◽  
2006 ◽  
Vol 259 (1-4) ◽  
pp. 260-267 ◽  
Author(s):  
B.P. North ◽  
T. Ellis ◽  
J.F. Turnbull ◽  
J. Davis ◽  
N.R. Bromage
Keyword(s):  
Rainbow Trout ◽  
Stocking Density ◽  
Trout Farms

scholarly journals The profitability of second-tier banks: essence and main influencing factors

2021 ◽  
Vol 101 (1) ◽  
pp. 36-47
Author(s):  
Zh.T. Yeveskina ◽  
Keyword(s):  
Regression Analysis ◽  
Pair Correlation ◽  
Correlation Coefficients ◽  
Net Income ◽  
Testing Hypotheses ◽  
Factors Affecting ◽  
Main Factors ◽  
Second Tier ◽  
The Republic ◽  
The Relationship

Object. In this article, based on the aggregate indicators of second-tier banks of the Republic of Kazakhstan, what factors and how they affect the net income of the bank is determined. Methods. During the analysis, a correlation-regression analysis of banking data was carried out using the Stata statistical package, and conclusions were drawn. Findings. To identify the factors that affect the profitability of banks, the interdependencies between the selected indicators were identified. The correlation analysis revealed the relationship between the selected factors and the bank's net income. The density of bonds was determined by testing hypotheses calculated based on pair correlation coefficients. Conclusions. The factor analysis carried out made it possible to identify the main factors affecting the bank's activities and assess the degree of their impact. As a result of the analysis of factors affecting the bank's income in the aggregate indicator of second-tier banks of the Republic of Kazakhstan, the compliance of the results obtained with the expected results was determined.

scholarly journals Research on the Influencing Factors of Russian Foreign Trade Based on R Language Regression Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Shuna Zhou ◽  
Chengwen Kang
Keyword(s):  
Regression Analysis ◽  
Foreign Trade ◽  
Influencing Factors ◽  
Real Effective Exchange Rate ◽  
Total Import ◽  
Factors Affecting ◽  
R Language ◽  
Import And Export ◽  
Main Factors ◽  
Language Regression

Based on the systematic analysis of the development of Russian foreign trade and the characteristics of the regional distribution structure of trade, this work further studies the influencing factors of Russia’s foreign trade by using the R language regression analysis method and constructs three econometric models from import, export, and total import and export. The real effective exchange rate and various instruments and equipment and accessories are the main factors affecting Russia’s import trade, energy, minerals, timber, and related products are the main factors affecting its export trade, and Russia’s GDP and international oil prices are the major factors affecting the total import and export volume. A correct understanding of the factors affecting Russia’s foreign trade will help to understand Russia’s economic and trade development and its changing trend and provide a reliable reference value for the further expansion and optimization of economic and trade cooperation between other economies and Russia.

scholarly journals ASSESSMENT OF THE DEVELOPMENT OF FOREIGN TRADE IN HIGH-TECH PRODUCTION OF UKRAINE UNDER THE ASSOCIATION WITH THE EU

2020 ◽  
Vol 18 (1) ◽  
pp. 157-182
Author(s):  
Igor Matyushenko ◽  
Serhii Hlibko ◽  
Mariana Mateeva Petrova ◽  
Maryna Serhiivna Pasmor ◽  
Maryna Loktionova
Keyword(s):  
Regression Analysis ◽  
Foreign Trade ◽  
Development Strategy ◽  
Industrial Revolution ◽  
World Market ◽  
High Tech ◽  
Factors Affecting ◽  
Main Factors ◽  
Practical Implications ◽  
The Eu

Purpose – the purpose of article should assess the main factors affecting the development of trade in high-tech products of Ukraine in the context of association with the EU and the spread of a new industrial revolution. Research methodology – the scheme of research of trade of high-tech products of Ukraine from the EU on the basis of qualitative and quantitative economic-statistical analysis, analysis of comparative advantages and correlation-regression analysis. Findings – the results of the analysis show that the main factors determining the low presence of Ukraine in the world market of high-tech products are the outdated structure of production, a low level of R&D costs, and a decrease in the innovative activity of Ukrainian enterprises. The article presents the author’s recommendations on improving the effectiveness of foreign trade in high-tech products of Ukraine in the EU market. Research limitations – the absence of a state development strategy for the production of hightech products does not make it possible to accurately determine indicators of scientific research of the potential of Ukraine. Practical implications – correlation-regression analysis results can be used in the private and state sectors of the economy of Ukraine. Originality/Value – the original combination of schemes and methods allowed us to identify new critical places for export development in the context of the association of Ukraine with the EU.

scholarly journals The Effect of Feeding Frequency on the Fin Condition in Rainbow Trout (Oncorhynchus mykiss)

2018 ◽  
Vol 66 (3) ◽  
pp. 669-675 ◽  
Author(s):  
Ondřej Klíma ◽  
Lukáš Kohút ◽  
Jan Mareš ◽  
Radovan Kopp
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Flow Direction ◽  
Feeding Frequency ◽  
Pectoral Fin ◽  
Fish Welfare ◽  
Pectoral Fins ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Significant Difference ◽  
The Right

Fin condition was assessed in the rainbow trout (Oncorhynchus mykiss) at an experimental recirculating facility using manual feeding 2 and 3 meals per day. Fin Index (FI) was used as an indicator of the find condition. Comparing the feeding frequencies 2 and 3 meals per day, a statistically significant difference was found (p < 0.05) for the FI of the pectoral, pelvic, anal, and caudal fins. For the 3 meals per day feeding frequency, a greater decrease of the FI was found compared to the feeding frequency 2 meals per day. In both pelvic fins the FI decreased by 53 %, in the caudal fins the FI decreased by 18 % and by 11 % in the anal fins, in the left pectoral fin the FI decreased by 6 % and by 12 % in the right one. Statistically significant difference was found between both pectoral fins for the feeding frequency of 3 meals per day. The left pectoral fin showed a FI higher by 8 % compared to the right one; the reason for the asymmetry being the water flow direction in the circular tanks. It follows from the results that in terms of fish welfare, it is more advisable to administer the feed 2 meals per day at maximum, in order to lower the risk of random biting by other individuals and to obtain a better fin condition.

Empirical Study of Credit Rating’s Factors Based on the Buyer’s Perspective in the Netshop of Small and Micro Enterprises in TianJin

2014 ◽  
Vol 697 ◽  
pp. 499-503
Author(s):  
Chen Xing Bai
Keyword(s):  
Factor Analysis ◽  
Regression Analysis ◽  
Empirical Study ◽  
Credit Rating ◽  
Specific Structure ◽  
Factors Affecting ◽  
Main Factors ◽  
Micro Enterprises

Researching on the factors affecting the level of credit rating in the netshop of small and micro enterprises in TianJin, the seven main factors are extracted through factor analysis; And then the paper does the regression analysis between the seven main factors and the credit rating levels, so does between each of the main factors and their specific structure. Finally, it calculates the order of importance and the value of impacting. So it can provide a reference for the network shop of small and micro enterprises to enhance the credit rating level.

Egtved Virus: Demonstration of Neutralizing Antibodies in Serum from Artificially Infected Rainbow Trout (Salmo gairdneri)

1971 ◽  
Vol 28 (6) ◽  
pp. 875-877 ◽  
Author(s):  
P. E. Vestergård Jørgensen
Keyword(s):  
Cell Culture ◽  
Rainbow Trout ◽  
Water Supply ◽  
Water Temperature ◽  
Neutralizing Antibodies ◽  
Tap Water ◽  
Natural Infection ◽  
Salmo Gairdneri ◽  
Trout Farms

Rainbow trout (Salmo gairdneri) kept in a tank with tap water supply for 18 months at a water temperature of 8–13 C were given monthly intraperitoneal injections of nonpathogenic cell-culture-derived Egtved virus. After 1 year, a low titer of neutralizing antibodies to Egtved virus could be demonstrated in the trout serum. Such antibodies could not be demonstrated by the method applied in sera from rainbow trout exposed to natural infection with Egtved virus at two Danish trout farms.

Analysis of Factors Affecting Customer Satisfaction Using Eucalyptus Oil on Walbarua Kettle in Ubung Village

2020 ◽  
Vol 1 (1) ◽  
pp. 1-6
Author(s):  
Firman Gazali Djunaidi ◽  
R.S. Masna Hatuwe ◽  
A. Yusdianti Tenriawali ◽  
Heny Irnayanti Umagapy ◽  
M Chairul Basrun Umanailo
Keyword(s):  
Regression Analysis ◽  
Consumer Satisfaction ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Oil Price ◽  
Factors Affecting ◽  
Eucalyptus Oil ◽  
Main Factors ◽  
Quantitative Descriptive ◽  
Research Period

This study aims to determine what factors influence consumer satisfaction in using eucalyptus oil in a Walbarua kettle in Ubung village, Buru Regency. This research is quantitative descriptive. The research is located in the kettle Walbarua in Ubung village. The research object is consumers having bought eucalyptus oil repeatedly in a Walbarua kettle in Ubung Village. The research period is a month from April to May 2020. The data collection techniques in this study are observation and questionnaires. Data analysis in this study using multiple linear regression analysis. The results showed that there was an effect of product quality on consumer satisfaction who had used eucalyptus oil in a Walbarua kettle in Ubung village of 41.9%, and there was an effect of price on consumer satisfaction who had used eucalyptus oil in a Walbarua kettle in Ubung village of 38.1 %. Therefore, the affordable eucalyptus oil price is one of the main factors to attract the attention of consumers for buying eucalyptus oil in Ubung Village.

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