Invasive American crayfish Pacifastacus leniusculus (Decapoda: Astacidae) in the Morava River (Slovakia)

Biologia ◽  
2007 ◽  
Vol 62 (3) ◽  
Author(s):  
Adam Petrusek ◽  
Tereza Petrusková
Keyword(s):  
Czech Republic ◽  
Pacifastacus Leniusculus ◽  
The Czech Republic ◽  
Potential Vector ◽  
Signal Crayfish ◽  
Morava River ◽  
Native Crayfish ◽  
Near Future ◽  
Crayfish Species ◽  
Invasive Capability

AbstractThe signal crayfish, Pacifastacus leniusculus (Dana, 1852), was recorded in the Slovak-Austrian stretch of the Morava (March) River in the Záhorie region in August 2006. This is the first confirmed record of a non-indigenous crayfish species of American origin in Slovakia. Most likely, signal crayfish were intentionally released to the river by Austrian fishermen, or invaded from adjacent water bodies in Austria. As this species has a substantial invasive capability and is a potential vector of the crayfish plague pathogen, it represents a threat to the native crayfish species and its spread should be monitored. Its invasion upstream to the territory of the Czech Republic is not unlikely in near future.

Relaxed attitude towards spreading of alien crayfish species affects protection of native crayfish species: case studies and lessons learnt from a Fennoscandian viewpoint

2020 ◽  
Vol 25 (1) ◽  
pp. 39-46
Author(s):  
Japo Jussila ◽  
Lennart Edsman
Keyword(s):  
Competitive Advantage ◽  
Pacifastacus Leniusculus ◽  
Astacus Astacus ◽  
Signal Crayfish ◽  
Aphanomyces Astaci ◽  
Noble Crayfish ◽  
Native Crayfish ◽  
Chronic Carrier ◽  
Highly Virulent ◽  
Crayfish Species

Abstract The spreading of the alien signal crayfish (Pacifastacus leniusculus) is posing an ongoing threat to native European crayfish species in Fennoscandia, like the native noble crayfish (Astacus astacus). The signal crayfish is commonly a chronic carrier of the crayfish plague (Aphanomyces astaci), thus, in addition to being more competitive than noble crayfish, it also has a competitive advantage in this disease over the noble crayfish. The challenges rising from the introduction of the alien signal crayfish to Sweden, Finland and finally also Norway, are similar in nature. The licensed and unlicensed spreading of this species also has a similar history in these countries. In this paper we describe some of the patters of the spread of alien signal crayfish and highlight the detrimental nature of an alien crayfish, accompanied by a highly virulent disease, to native Fennoscandian crayfish and also to native Fennoscandian ecosystems. A halt to the further spreading of alien signal crayfish in Fennoscandia is the only means to ensure successful conservation outcomes for the noble crayfish.

scholarly journals Native European branchiobdellids on non-native crayfishes: Report from the Czech Republic

2017 ◽  
Vol 77 (1) ◽  
Author(s):  
Martin Bláha ◽  
Filip Ložek ◽  
Miloš Buřič ◽  
Antonín Kouba ◽  
Pavel Kozák
Keyword(s):  
Native Species ◽  
Invasive Alien Species ◽  
Pacifastacus Leniusculus ◽  
Astacus Astacus ◽  
The Czech Republic ◽  
Orconectes Limosus ◽  
The Mean ◽  
Global Threat ◽  
Native Crayfish ◽  
Crayfish Species

Invasive alien species present a global threat to biodiversity, particularly where pathogens and symbionts are involved. Non-native crayfish species can increase their impact on the host ecosystem through introductions of symbiotic fauna. Conversely, non-native crayfishes could serve as hosts for native epibionts, thus substituting for disappearing native crayfishes as well. Here we report the presence of native branchiobdellids on naturalized populations of non-native crayfish Orconectes limosus and Pacifastacus leniusculus living in sympatry with native Astacus astacus. The native crayfish species probably served as a source of Branchiobdella spp. for non-native crayfishes. Two species of Branchiobdella (B. parasita and B. pentadonta) were found on P. leniusculus while only B. parasita was found on O. limosus. The level of colonization of inspected specimens and species was also evaluated. The mean number of branchiobdellids found on P. leniusculus and O. limosus was 26.0±15.9, and 64.8±27.7, respectively. Orconectes limosus was more heavily colonized by Branchiobdella despite being significantly smaller than P. leniusculus. Non-native species were corroborated as suitable to host the native epibionts. 

scholarly journals Strategic Challenges of Human Resources Allocation in Industry 4.0

Information ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 120
Author(s):  
Majid Ziaei Nafchi ◽  
Hana Mohelská
Keyword(s):  
Czech Republic ◽  
Human Resources ◽  
Industry 4.0 ◽  
Industrial Revolution ◽  
High Tech ◽  
Economic Sectors ◽  
The Czech Republic ◽  
Services Sector ◽  
Productivity And Competitiveness ◽  
Near Future

The emergence of the fourth industrial revolution (Industry 4.0, hereinafter I 4.0) has led to an entirely fresh approach to production, helping to enhance the key industrial processes and therefore increase the growth of labor productivity and competitiveness. Simultaneously, I 4.0 compels changes in the organization of work and influences the lives of employees. The paper intends to construct a model for predicting the allocation of human resources in the sectors of the national economy of the Czech Republic in connection with I 4.0. The model used in this research visualizes the shift of labor in the economic sectors of the Czech Republic from the year 2013 to the following years in the near future. The main contribution of this article is to show the growth of employment in the high-tech services sector, which will have an ascending trend.

scholarly journals The performance of the Czech labour market after the 2004 EU enlargement

2013 ◽  
Vol 58 (197) ◽  
pp. 79-94
Author(s):  
Wadim Strielkowski ◽  
Jan Hněvkovský
Keyword(s):  
Czech Republic ◽  
Labour Market ◽  
Eu Enlargement ◽  
Foreign Workers ◽  
Eu Accession ◽  
The Czech Republic ◽  
Eu Membership ◽  
Significant Change ◽  
Near Future ◽  
The Eu

This paper examines whether there has been a significant change in the performance of the Czech labour market after the Czech Republic?s EU Accession in May 2004. We analyse methodological changes of measuring unemployment caused by inevitable legislative adjustments and follow the development of the Czech labour market and the inflows of foreign workers to the Czech Republic over the past two decades. Our results show that the EU Accession resulted in simplifying foreigners? access to the Czech labour market and did not cause a significant change in its performance. Our findings might be of some relevance for the countries seeking EU Membership in the near future (e.g., Serbia or Montenegro).

scholarly journals Estimation of land loss in the Czech Republic in the near future  

2016 ◽  
Vol 11 (No. 3) ◽  
pp. 155-162
Author(s):  
J. Janků ◽  
O. Jakšík ◽  
J. Kozák ◽  
A.M. Marhoul
Keyword(s):  
Czech Republic ◽  
Land Loss ◽  
The Czech Republic ◽  
Near Future

scholarly journals  Expected impacts of climate change on forests: Czech Republic as a case study

2011 ◽  
Vol 57 (No. 10) ◽  
pp. 422-431 ◽  
Author(s):  
T. Hlásny ◽  
J. Holuša ◽  
ŠtěpánekP ◽  
TurčániM ◽  
SitkováZ ◽  
...  
Keyword(s):  
Czech Republic ◽  
Forest Tree ◽  
Forest Vegetation ◽  
Limiting Factor ◽  
The Czech Republic ◽  
Distant Future ◽  
Vegetation Season ◽  
Fundamental Information ◽  
Near Future

  We provide fundamental information about the future development of selected climate elements in relation to anticipated threat to forests in the Czech Republic. All analyses were carried out in relation to four elevation zones with specific potential forest vegetation – up to 350 m a.s.l. (oak dominance), 350–600 m a.s.l. (beech dominance), 600–900 m a.s.l. (beech-fir dominance), 900–1,100 m a.s.l. (spruce dominance). We found out that while the projected increase in mean annual air temperature is almost constant over the Czech Republic (+3.25–3.5°C in the distant future), the frequency of heat spells at lower elevations is expected to increase dramatically compared to higher elevations. The precipitation totals during the vegetation season are projected to increase in the near future by up to 10% and to decrease in the distant future by up to 10% over all vegetation zones. In general, drought is presumed to become a key limiting factor at lower elevations, while increased temperature along with the prolonged vegetation season at higher elevations can be beneficial to forest vegetation. Consequently, northward progression of forest tree species and retraction of the species lower distribution range are a generic response pattern. Such impacts are presumed to be accompanied by changes in the distribution and population dynamics of pests and pathogens. Mainly the impacts on two key forest pests, Ips typographus and Lymantria dispar, are discussed.  

scholarly journals Geographical variability of sprucebark beetle development under climate change in the Czech Republic

2011 ◽  
Vol 57 (No. 6) ◽  
pp. 242-249 ◽  
Author(s):  
T. Hlásny ◽  
L. Zajíčková ◽  
M. Turčáni ◽  
J. Holuša ◽  
Z. Sitková
Keyword(s):  
Climate Change ◽  
Czech Republic ◽  
Bark Beetle ◽  
Ips Typographus ◽  
The Czech Republic ◽  
Distant Future ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
Generation Regime ◽  
Near Future

Climate change is expected to influence the distribution and population dynamics of many insect pests, with potential severe impacts on forests. Spruce bark beetle Ips typographus (L.) (Col.: Curculionidae, Scolytinae) is the most important forest insect pest in Europe whose development is strictly regulated by air temperature. Therefore, climate change is anticipated to induce changes in the pest's distribution and development. We used the PHENIPS model to evaluate climate change impacts on the distribution and voltinism of spruce bark beetle in the Czech Republic. Two future time periods – 2025–2050 (near future) and 2075–2100 (distant future) – are addressed. The period 1961–1990 is used as the reference. We found that while a two-generation regime dominated in the Czech Republic in the reference period, significant three-generation regime regions are projected to appear in the near future. In the distant future, the three-generation regime can be expected to occur over all existing coniferous stands in the Czech Republic. The analysis of altitudinal shift of n-generation regime regions indicates noticeable expansion of Ips typographus development to higher elevations, leading for example to disappearance of one-generation regime regions in the distant future. Uncertainties and limitations of the presented findings are discussed as well.

scholarly journals Evaluation of sanitary status of grapevines in the Czech Republic

2011 ◽  
Vol 49 (No. 2) ◽  
pp. 63-66 ◽  
Author(s):  
P. Komínek ◽  
V. Holleinová
Keyword(s):  
Czech Republic ◽  
Grapevine Virus ◽  
Arabis Mosaic Virus ◽  
The Czech Republic ◽  
Grapevine Virus A ◽  
Grapevine Virus B ◽  
Near Future ◽  
Infected Grapevine ◽  
Das Elisa ◽  
Propagation Material

A survey was made to evaluate sanitary status of grapevines in the Czech Republic with regard to occurrence of economically important viruses. Propagation material of 109 grapevine clones was tested for presence of Grapevine fanleaf virus, Arabis mosaic virus, Grapevine leafroll-associated virus 1, Grapevine leafroll-associated virus 3, Grapevine virus A, Grapevine virus B and Grapevine fleck virus. Dormant canes were collected and cortical scrappings were analyzed by DAS-ELISA. All seven viruses tested were found to be widely spread in Czech propagation material of grapevine. From 330 individual vines tested, 148 vines were found to be infected with at least one virus. From 109 clones tested, in 98 clones at least one vine negative for tested pathogens was found. Such vines were promoted as candidate plants into screenhouse in Faculty of Horticulture Lednice and will be further tested by other methods. Sanitation of infected grapevine clones is needed in near future.

scholarly journals Treatment of Biogas for Use as Energy

10.14311/1173 ◽  
2010 ◽  
Vol 50 (2) ◽  
Author(s):  
J. Koller
Keyword(s):  
Renewable Energy ◽  
Czech Republic ◽  
Natural Gas ◽  
Biogas Production ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
The Czech Republic ◽  
Agriculture Industry ◽  
Biogas Plants ◽  
Near Future

The biogas generated in biogas plants offers significant potential for the production of energy from renewable energy sources. The number biogas plants in the Czech Republic is expected to exceed one hundred in the near future. Substrates from agriculture, industry and municipal wastes are used for biogas production. Biogas plants usually use co-generation units to generate electricity and heat. Increased effectiveness can be achieved by using heat as a source of energy for producing renewable natural gas.

scholarly journals Changes in consumer behavior on the market with food

2009 ◽  
Vol 57 (3) ◽  
pp. 173-178 ◽  
Author(s):  
Jana Turčínková ◽  
Jana Stávková
Keyword(s):  
Czech Republic ◽  
Consumer Preferences ◽  
Food Products ◽  
Fats And Oils ◽  
Added Value ◽  
Alcoholic Beverages ◽  
The Czech Republic ◽  
Consumer Expenditures ◽  
Total Milk ◽  
Near Future

Czech Republic has experienced significant changes on the market with food in last two decades. The paper presents summary of results of conducted analyses focusing on changes in levels of most important food categories, changes in consumer preferences, and suggests what trends we can expect in the near future. The analyses were based on date from Czech Statistical Office Yearbooks, EUROSTAT, INCOMA and GfK, and data from primary researches conducted on sample of total 2522 households in the Czech Republic through questionnaire researches in 2005, 2006 and 2007. The results show that in the Czech Republic, the ratio of expenditures for food out of total consumer expenditures is slowly decreasing and advances to (still lower) level typical for traditional EU countries. We have experienced growth of demand for products with higher added value; customers put more emphasis on perceived quality, longer durability and special product characteristics. Czech con­su­mers increase their consumption of vegetables and fruit, bottled beverages, wine and alcoholic beverages, cheese, they decreased their consumption of meat (in total), milk and potatoes, stagnation was typical for bakery products, sugar and fats and oils. Development in all social classes was very similar. For the future, we can expect growing interest for food products in smaller packages and targeted at specific needs, growing demand for food products with higher added value, consumption of food formerly unusual for the Czech, more frequent out-of-home eating, and growing differences between individual segments of social groups, mainly due to uneven income distribution.

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