EJPAU, 2018, Volume 21, Issue 2

No /
Available Online
Sort By:
Date - Discipline - Title
Hide Abstracts
21(2) #01
15 Jun 2018
citation  abstract  html 

Development of aquaculture has resulted in the need to develop a tool to assess fish production efficiency. This study proposes a method using selected attributes which can be changed and adapted in dependence on the purpose of the assessment. The attributes are also provided with an importance level, expressed in percentage terms, due to which an attribute considered by the assessors as more significant can have a stronger impact on the final results. The usefulness of the method was tested on the results obtained for production from six fish farms using three different carp breeding technologies and from six rainbow trout farms carrying out production in flowing or recirculated water. The following attributes were applied: slaughter output, content of protein and fat, fatty acids n-3/n-6 ratio and results of organoleptic analysis. Carp bred by semi-extensive technology, next, the one bred by low-intensive method, gained the best GZS value. Also, dependence of GZS value of carp to the season of netting was confirmed. Presented results did not show influence of different farming system on the GZS value of trout bred with OOH and RAS systems. It has been shown that the method can be a useful tool for selecting the optimal technology of fish production for specified environmental conditions, as well as a supervision or reporting tool for state and non-state institutions.

21(2) #02
15 Jun 2018
citation  abstract  html 

Cereals contain 5-n-alkylresorcinols that are potent antimicrobials. Despite of this fact various bacteria effectively colonize cereals. The aim of this study was to determine whether the tolerance of strain PO150, isolated from wheat rhizosphere, to orcinol could play a role in wheat colonization. The formation of the petite-sized and non-fluorescent colonies of this strain was observed already at a dose of 1.0 mg cm-3 orcinol. Its proliferation, in turn, was completely inhibited by 1.5 mg cm-3 of this phenolic compound. A Tn5 mutant with reduced tolerance to orcinol more weakly colonized both wheat kernels and the 24-h-old germinating seeds than the parent strain. Moreover, both the mutant and wild-type strain adhered more effectively to grains of the cultivar which contained less 5-n-alkylresorcinols. Thus, our results suggest that resistance to wheat seed alkylresorcinols can be important for the early stages of its colonization by this rhizobacteria of the genus Pseudomonas.

Legend:  Citation Citation Information     Abstract View Abstract     Article (HTML) View Article (HTML)     Article (PDF) View Article (PDF)