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Kornillowicz-Kowalska T.,Lublin University of Life Sciences | Kitowski I.,The State School of Higher Education in Chelm
Mycopathologia | Year: 2013

A study was performed on the numbers and species diversity of thermophilic fungi (growing at 45 °C in vitro) in 38 nests of 9 species of wetland birds, taking into account the physicochemical properties of the nests and the bird species. It was found that in nests with the maximum weight (nests of Mute Swan), the number and diversity of thermophilic fungi were significantly greater than in other nests, with lower weight. The diversity of the thermophilic biota was positively correlated with the individual mass of bird and with the level of phosphorus in the nests. The dominant species within the mycobiota under study was Aspergillus fumigatus which inhabited 95 % of the nests under study, with average frequency of ca. 650 cfu g-1 of dry mass of the nest material. In a majority of the nests studied (nests of 7 bird species), the share of A. fumigatus exceeded 50 % of the total fungi growing at 45 °C. Significantly higher frequencies of the fungal species were characteristic of the nests of small and medium-sized piscivorous species, compared with the other bird species. The number of A. fumigatus increased with increase in the moisture level of the nests, whereas the frequency of occurrence of that opportunistic pathogen, opposite to the general frequency of thermophilic mycobiota, was negatively correlated with the level of phosphorus in the nest material, and with the body mass and length of the birds. The authors indicate the causes of varied growth of thermophilic fungi in nests of wetland birds and, in particular, present a discussion of the causes of accumulation of A. fumigatus, the related threats to the birds, and its role as a source of transmission in the epidemiological chain of aspergillosis. © 2012 Springer Science+Business Media B.V.

Swic A.,Lublin University of Technology | Mazurek L.,The State School of Higher Education in Chelm
Eksploatacja i Niezawodnosc | Year: 2011

The paper introduces a mathematical model of operation of a flexible synchronous production line (FSPL) of multifunctional CNC machines that includes one redundant multifunctional CNC machine which can take over the functions of every FSPL machine. The graph of FSPL state, relations and equations used to calculate reliability and productivity are shown. Maple, the software used for reliability and productivity calculations and modelling, as well as the mathematical results are presented.

Janowski T.,Lublin University of Technology | Holuk M.,The State School of Higher Education in Chelm
Przeglad Elektrotechniczny | Year: 2012

The possibility of use the micro combined heat and power systems with the Stirling engine fed by biomass occurring in lubelskie province is aim of the paper. The consider of micro-cogeneration unit with the Stirling engine is made investigations to prepare experimental system model. The concerning method of biomass in micro combined heat and power system in agricultural farms in the following years.

This study deals with the population size and the distribution of breeding colonies of the rook in rural parks in the eastern part of the Lublin region (Eastern Poland). Large parks with a large number of tree species were appropriate sites for larger rookeries. Small, degraded parks, with few species of trees, were used by smaller rookeries, which showed tendencies to disappear more quickly. Small colonies were irrevocably abandoned if disturbed by man, whereas large ones had a very high reoccupation potential, even after a few years. Unfortunately, ownership changes concerning rural parks in Eastern Poland may endanger the rookeries located there.

Kitowski I.,The State School of Higher Education in Chelm
North-Western Journal of Zoology | Year: 2013

Prey use is compared between barn owl and long-eared owl from pellets sampled at six sites in eastern Poland. Mammals made up 97.3% of long-eared owl diet by biomass. The most important species were voles Microtus spp. and mice Apodemus spp., constituting 79.9% and 13.0% by biomass, respectively. Their average prey weight was 19.9 g. Mammals made up 99.6% of barn owl diet by number and 99.2% by biomass. The most important were voles Microtus spp. and mice Apodemus spp., constituting 79.9% and 13.0% by biomass, respectively. Average prey weight was 12.3g. A significant difference was found in the mean weight of prey taken by the two owl species. barn owls took less avian prey compared to long-eared owls. Birds caught by long-eared owls were also heavier than those caught by barn owls, though the difference was not significant. The median weight of bird prey for barn owls and long-eared owls was 23 g and 32 g, respectively. The similarity of diet of the wintering owls in particular sites was in the range: 9.0%-98.4%. The total prey overlap of the two wintering species was 83.2%. © NwjZ, Oradea, Romania, 2013.

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