scholarly journals Picromerus bidens (Heteroptera: Pentatomidae) as predator of the Checkerspot Euphydryas aurinia (Lepidoptera: Nymphalidae)

2005 ◽  
Vol 16 (4) ◽  
Author(s):  
Martin Konvička ◽  
Vladimir Hula ◽  
Zdenek Fric
Keyword(s):  
Czech Republic ◽  
Mortality Factor ◽  
Euphydryas Aurinia ◽  
Local Populations ◽  
Western Bohemia ◽  
Widespread Phenomenon ◽  
Heteroptera Pentatomidae ◽  
Marsh Fritillary

The predatory bug Picromerus bidens is reported as a regular predator of the Marsh Fritillary Euphydryas aurinia from the region of western Bohemia, Czech Republic. Adult bugs attack pre-diapause larvae, either exposed or hidden in protective silken webs, and exhibit efficient behaviour, including returning to previously attacked webs. We observed predation in six out of 28 and eleven out of 21 local populations in 2003 and 2004, respectively. In addition, we observed two attacks by nymphs on handicapped adult butterflies. Predation of Melitaeinae by Heteroptera seems to be a widespread phenomenon, and P. bidens can act as a substantial mortality factor in small colonies of E. aurinia.

scholarly journals Marsh Fritillary (Euphydryas aurinia) in the Czech Republic: monitoring, metapopulation structure, and conservation of an endangered butterfly

2004 ◽  
Vol 15 (4) ◽  
Author(s):  
Vladimir Hula ◽  
Martin Konvička ◽  
Alois Pavlicko ◽  
Zdenek Fric
Keyword(s):  
Czech Republic ◽  
The Czech Republic ◽  
Euphydryas Aurinia ◽  
Local Dynamics ◽  
Metapopulation Structure ◽  
Western Bohemia ◽  
Structure Patterns ◽  
Marsh Fritillary

Thirty colonies of the Marsh Fritillary (Euphydryas aurinia) have recently been recorded in Western Bohemia, Czech Republic. The majority of colonies are small, their total area are 1.5 km2. Small size and intensive grazing/mowing were positively associated with observed declines/extinctions, while abandonment threatens the colonies in the longer term. Short distances to nearest colonies buffered against declines. High colony turnover, asynchronous local dynamics pointed and the species’ biotope requirements all point to a dynamic metapopulation structure; patterns of connectivity revealed that there are several metapopulations within the region. Because conserving the species within its extant sites seems unsustainable in the long term, restoration of its habitats is proposed.

scholarly journals Demography of adults of the Marsh fritillary butterfly, Euphydryas aurinia (Lepidoptera: Nymphalidae) in the Czech Republic: Patterns across sites and seasons

2011 ◽  
Vol 108 (2) ◽  
pp. 243-254 ◽  
Author(s):  
Kamil ZIMMERMANN ◽  
Pavla BLAZKOVA ◽  
Oldrich CIZEK ◽  
Zdenek FRIC ◽  
Vladimir HULA ◽  
...  
Keyword(s):  
Czech Republic ◽  
The Czech Republic ◽  
Euphydryas Aurinia ◽  
Marsh Fritillary

Newly identified Pleistocene maars in Western Bohemia (Czech Republic)

2019 ◽  
Author(s):  
Jan Hošek ◽  
Jan Valenta ◽  
Vladislav Rapprich ◽  
Tomáš Hroch ◽  
Veronika Turjaková ◽  
...  
Keyword(s):  
Czech Republic ◽  
Western Bohemia

scholarly journals Caterpillars of the marsh fritillary butterfly Euphydryas aurinia can extend their life-cycle in Scotland

2021 ◽  
Author(s):  
Neil O. M. Ravenscroft
Keyword(s):  
Life Cycle ◽  
Conservation Status ◽  
Northern Europe ◽  
First Year ◽  
Winter Mortality ◽  
Closely Related Species ◽  
Euphydryas Aurinia ◽  
High Conservation ◽  
The Uk ◽  
Marsh Fritillary

AbstractThe marsh fritillary Euphydryas aurinia is declining across Europe and is of high conservation interest. Its ecology has been defined and its conservation status assessed primarily from the affinities and populations of young caterpillars in the autumn, before hibernation and high winter mortality. The possibility that caterpillars of E. aurinia can overwinter more than once was investigated on the Isle of Islay, Scotland after caterpillars were found to occur at some locations in the spring despite a pre-hibernation absence. Closely-related species in North America and Northern Europe can prolong larval development by diapausing for a year as does E. aurinia in Scandinavia. Measurements of development and manipulations of distribution confirmed that some caterpillars do extend the life-cycle in Scotland and may occur in areas devoid of larvae in their first year. Caterpillars attempting this life-cycle develop slowly in spring, attain the normal penultimate spring instar and then enter diapause while other caterpillars are pupating. They moult just before diapause, construct highly cryptic webs and on emergence the following spring are 5–6 times heavier than larvae emerging in their first spring, or the equivalent of a month or so ahead. They attain a final, extra instar as larvae in their first spring reach the penultimate instar. Knowledge of this life-cycle is confined in the UK to Islay but its occurrence in this mild climate implies that it is more widespread.Implications for insect conservation Conditions that permit long diapause are probably precise and may not be reflected in recognised qualities of habitat. The species may also be present despite a perceived absence in autumn, the standard period for monitoring. Assessments of the prevalence of the life-cycle and its contribution to the persistence of E. aurinia are required. Populations of E. aurinia are known to fluctuate greatly and do occur below the observation threshold for long periods.

“The older I got, it wasn’t a problem for me anymore”: Language brokering as a managed activity and a narrated experience among young Vietnamese immigrants in the Czech Republic

Multilingua ◽  
2017 ◽  
Vol 36 (1) ◽  
pp. 1-29 ◽  
Author(s):  
Tamah Sherman ◽  
Jiří Homoláč
Keyword(s):  
Czech Republic ◽  
Language Brokering ◽  
Management Theory ◽  
Language Management ◽  
Family Responsibilities ◽  
Methodological Innovation ◽  
The Czech Republic ◽  
Transnational Communities ◽  
Widespread Phenomenon ◽  
Policy And Planning

AbstractLanguage brokering (LB) practices are a widespread phenomenon in transnational communities. This paper aims to add to the description and analysis of these practices within a community which has not been extensively studied – the Vietnamese in the Czech Republic, as well as show how LB is embedded in other sociolinguistic aspects of community life. Based on language biographies of 13 Vietnamese female brokers, we explore LB by focusing on the respondents’ descriptions and summaries of their beginnings with it, the difficulties that occurred, and how they were overcome. The findings suggest that, among others, the brokers gradually perceive brokering as a normal practice and as one of their family responsibilities. A methodological innovation is the use of Language Management Theory (Nekvapil, Jiří & Tamah Sherman. 2015. An introduction: Language Management Theory in Language Policy and Planning.

The collapse of marsh fritillary ( Euphydryas aurinia ) populations associated with declining host plant abundance

2017 ◽  
Vol 211 ◽  
pp. 117-124 ◽  
Author(s):  
Ane Kirstine Brunbjerg ◽  
Toke Thomas Høye ◽  
Anne Eskildsen ◽  
Bettina Nygaard ◽  
Christian Frølund Damgaard ◽  
...  
Keyword(s):  
Host Plant ◽  
Plant Abundance ◽  
Euphydryas Aurinia ◽  
Marsh Fritillary

scholarly journals Cyclic abundance fluctuations in a completely isolated population of Euphydryas maturna

2021 ◽  
Vol 44 ◽  
pp. 213-222
Author(s):  
Václav John ◽  
Alois Pavlíčko ◽  
Vladimír Vrabec ◽  
Veronika Rybová ◽  
Miloš Andres ◽  
...  
Keyword(s):  
Time Series ◽  
Czech Republic ◽  
Natural Enemies ◽  
Single Site ◽  
Ex Situ ◽  
Isolated Population ◽  
Peak Period ◽  
Local Populations ◽  
Harmonic Means ◽  
Abundance Fluctuations

A highly isolated and the last autochthonous Czech Republic population of the endangered Euphydryas maturna (Lepidoptera: Nymphalidae) is monitored since 2001 by larval nests counts. The 20 years` time series displays remarkable abundance fluctuations with peak-to-peak period 11 years, peak numbers >150 and bust numbers <15 larval nests (arithmetic and harmonic means: 92.6 and 36.3). Establishment of more favourable management of the site probably heightened and prolonged the boom phase but did not alter the overall pattern. We attribute the cycling to pressures of natural enemies. Climatically unfavourable years appear deepening the bust phase. Species displaying such fluctuations cannot be conserved within a single site, which is being addressed by ex-situ breeding of the Czech stock and recent reestablishment of two additional populations, with the aim to achieve asynchronous dynamics of the local populations and eventually stabilise the regional metapopulation.

scholarly journals Deraeocoris schach, a new predator of Euphydryas aurinia and other heteropteran feeding habits on caterpillar web (Heteroptera: Miridae; Lepidoptera: Nymphalidae)

2016 ◽  
Vol 48 (1) ◽  
pp. 77 ◽  
Author(s):  
Manuela Pinzari
Keyword(s):  
Field Study ◽  
Feeding Habits ◽  
Central Italy ◽  
Euphydryas Aurinia ◽  
Preliminary Results ◽  
Marsh Fritillary

In this paper, preliminary results on a field study aiming to identify predators of the Marsh Fritillary<em> Euphydryas aurinia</em> (Rottemburg, 1775) in Central Italy are presented. Several heteropterans were found on the larval nests of <em>E. aurinia</em> for dietary reasons: <em>Deraeocoris schach</em> (Fabricius, 1781) that is a predator of Marsh Fritillary larvae, <em>Palomena prasina</em> (Linnaeus, 1761) and <em>Spilostethus saxatilis</em> (Scopoli, 1763) that feed on the droppings of larvae; <em>Graphosoma lineatum</em> <em>italicum</em> (Müller, 1766) that visits the larval web during winter diapause.

Petrogenesis of contrasting granitoid plutons in western Bohemia (Czech Republic)

1999 ◽  
Vol 65 (3-4) ◽  
pp. 207-235 ◽  
Author(s):  
W. Siebel ◽  
K. Breiter ◽  
I. Wendt ◽  
A. H�hndorf ◽  
F. Henjes-Kunst ◽  
...  
Keyword(s):  
Czech Republic ◽  
Western Bohemia
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