Effects of Certain Climatic Factors on the Daily Abundance of the European Earwig, Forficula auricularia L. (Dermaptera: Forficulidae), in Vancouver, British Columbia

1952 ◽  
Vol 84 (6) ◽  
pp. 174-180 ◽  
Author(s):  
D. A. Chant ◽  
J. H. McLeod
Keyword(s):  
British Columbia ◽  
Climatic Factors ◽  
Forficula Auricularia ◽  
European Earwig

During September, 1950, 23,180 specimens of the European earwig, Forficula auricularia L., were collected in Vancouver, British Columbia, for the purpose of recovering the imported parasite Bigonicheta setipennis (Fall.). Great fluctuations were observed in the number of insects caught from day to day. This paper is an attempt to assess the role of various climatic factors in these fluctuations.

Potential role of seed treatments in the management of emerging arthropod pests of canola

2019 ◽  
Vol 70 (10) ◽  
pp. 890 ◽  
Author(s):  
Paul A. Umina
Keyword(s):  
Potential Role ◽  
Conservation Agriculture ◽  
Seed Treatments ◽  
Management Options ◽  
Forficula Auricularia ◽  
Stubble Retention ◽  
Plant Chemical ◽  
Lambda Cyhalothrin ◽  
European Earwig

Conservation agriculture has changed the farming landscape. Reduced tillage, stubble retention and changes in crop agronomy have provided considerable benefits to farmers and the environment, but such practices have also influenced arthropod communities residing in these landscapes. Within Australia, there has been an increase in the pest status of several introduced arthropods including Armadillidium vulgare (common pillbug), Forficula auricularia (European earwig) and Ommatoiulus moreleti (black Portuguese millipede). In the present study, the role of insecticide seed treatments in managing these species was examined. Species differed in their responses when exposed to seedlings coated with four commercially-available seed treatments. F. auricularia numbers were reduced by treatments of fipronil (Cosmos) and a mixture of clothianidin and imidacloprid (Poncho Plus). These treatments also reduced A. vulgare numbers, as did a third product, a mixture of thiamethoxam and lambda-cyhalothrin (Cruiser Opti). Mortality of O. moreleti was affected by all four seed treatments. Importantly, arthropod mortality did not always correlate with the levels of protection conferred by each treatment. This points to a complexity of interactions between plant, chemical and pest feeding behaviour. These results are discussed in the context of developing pest management options for these widespread arthropods.

Notes on the Parasitism and Food Habits of the European Earwig, Forficula auricularia L. (Dermaptera: Forficulidae)

1952 ◽  
Vol 84 (11) ◽  
pp. 343-345 ◽  
Author(s):  
J. H. McLeod ◽  
D. A. Chant
Keyword(s):  
British Columbia ◽  
Food Habits ◽  
Forficula Auricularia ◽  
Abundance And Distribution ◽  
European Earwig

In 1936, 1937, and 1938 several colonies of Bigonicheta setipennis (Fall.), a dipterous parasite, were liberated in Vancouver, British Columbia, to aid in the control of the European earwig, Forficula auricularia L. During September and October, 1950, an investigation was initiated to determine the abundance and distribution of this parasite and, if possible, to obtain colonies for release in Newfoundland. Approximately 6,000 of B. setipennis were reared from 50,000 trapped earwigs.

Epigeal phase of the biological cycle of Forficula auricularia Linnaeus (Dermaptera: Forficulidae) in eastern Canada

2017 ◽  
Vol 149 (5) ◽  
pp. 600-606 ◽  
Author(s):  
Jean-Claude Tourneur
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
New Brunswick ◽  
Sibling Species ◽  
Climatic Conditions ◽  
Biological Cycle ◽  
Eastern Canada ◽  
Forficula Auricularia ◽  
Other World ◽  
European Earwig

AbstractThe population structure of the European earwig, Forficula auricularia Linnaeus (Dermaptera: Forficulidae), was investigated in three sites in eastern Canada (Montréal, Québec; Fredericton, New Brunswick; Truro, Nova Scotia), with two goals; describe the seasonal trends of the epigeal phase, and ascertain if the three studied populations belong to sibling species “A”, as opposed to sibling species “B” found in Vancouver, British Columbia, Canada. Insects were collected using wooden grooved traps placed on lawns and tree trunks; traps were checked weekly from the first spring melt of the frost barrier until after autumn first frost (epigeal phase). The epigeal phase was short, about five months. The different instars and adults showed a single peak of abundance. No first instars, few second instars, and mostly fourth instars and adults were collected in the arborescent stratum. The data demonstrated that these three populations have the same epigeal phenology. The interbreeding experiment established that the three studied populations belong to the same sibling species (A) of F. auricularia, and differ from sibling species (B) from Vancouver. I suggest that the climatic conditions in eastern Canada are like those in other world regions where sibling species “A” is present, and that these regions represent the edge of the bioclimatic environment of this species because of its limits on reproduction.

scholarly journals A meta-analysis of the literature on climate change and migration

2021 ◽  
pp. 1-52
Author(s):  
Michel Beine ◽  
Lionel Jeusette
Keyword(s):  
Climate Change ◽  
Climatic Factors ◽  
Human Mobility ◽  
Meta Analysis ◽  
Empirical Studies ◽  
Displacement Effect ◽  
Methodological Choices ◽  
Econometric Methods ◽  
And Migration

Abstract Recent surveys of the literature on climate change and migration emphasize the important diversity of outcomes and approaches of the empirical studies. In this paper, we conduct a meta-analysis in order to investigate the role of the methodological choices of these empirical studies in finding some particular results concerning the role of climatic factors as drivers of human mobility. We code 51 papers representative of the literature in terms of methodological approaches. This results in the coding of more than 85 variables capturing the methodology of the main dimensions of the analysis at the regression level. These dimensions include authors' reputation, type of mobility, measures of mobility, type of data, context of the study, econometric methods, and last but not least measures of the climatic factors. We look at the influence of these characteristics on the probability of finding any effect of climate change, a displacement effect, an increase in immobility, and evidence in favor of a direct vs. an indirect effect. Our results highlight the role of some important methodological choices, such as the frequency of the data on mobility, the level of development, the measures of human mobility and of the climatic factors as well as the econometric methodology.

Characterizing spatial structures of larval fish assemblages at multiple scales in relation to environmental heterogeneity in the Strait of Georgia (British Columbia, Canada)

2018 ◽  
Vol 75 (11) ◽  
pp. 1902-1914 ◽  
Author(s):  
Lu Guan ◽  
John F. Dower ◽  
Pierre Pepin
Keyword(s):  
British Columbia ◽  
Environmental Heterogeneity ◽  
Multiple Scales ◽  
Larval Fish ◽  
Critical Role ◽  
Multiscale Approach ◽  
Spatial Structures ◽  
Strait Of Georgia ◽  
Medium Scale

Spatial structures of larval fish in the Strait of Georgia (British Columbia, Canada) were quantified in the springs of 2009 and 2010 to investigate linkages to environmental heterogeneity at multiple scales. By applying a multiscale approach, principal coordinate neighborhood matrices, spatial variability was decomposed into three predefined scale categories: broad scale (>40 km), medium scale (20∼40 km), and fine scale (<20 km). Spatial variations in larval density of the three dominant fish taxa with different early life histories (Pacific herring (Clupea pallasii), Pacific hake (Merluccius productus), and northern smoothtongue (Leuroglossus schmidti)) were mainly structured at broad and medium scales, with scale-dependent associations with environmental descriptors varying interannually and among species. Larval distributions in the central-southern Strait were mainly associated with salinity, temperature, and vertical stability of the top 50 m of the water column on the medium scale. Our results emphasize the critical role of local estuarine circulation, especially at medium spatial scale, in structuring hierarchical spatial distributions of fish larvae in the Strait of Georgia and suggest the role of fundamental differences in life-history traits in influencing the formation and maintenance of larval spatial structures.

Molecular and Reproductive Characterization of Sibling Species in the European Earwig (Forficula auricularia)

Evolution ◽  
1998 ◽  
Vol 52 (1) ◽  
pp. 260 ◽  
Author(s):  
Thierry Wirth ◽  
Rene Le Guellec ◽  
Michel Vancassel ◽  
Michel Veuille
Keyword(s):  
Sibling Species ◽  
Forficula Auricularia ◽  
European Earwig

Calibrated Radiocarbon Dating at Keatley Creek: The Chronology of Occupation at a Complex Hunter-Gatherer Village

2003 ◽  
Vol 68 (4) ◽  
pp. 719-735 ◽  
Author(s):  
William C. Prentiss ◽  
Michael Lenert ◽  
Thomas A. Foor ◽  
Nathan B. Goodale ◽  
Trinity Schlegel
Keyword(s):  
British Columbia ◽  
Radiocarbon Dating ◽  
Climatic Factors ◽  
Climatic Warming ◽  
Radiocarbon Dates ◽  
Population Aggregation ◽  
Selective Environment

This paper provides an analysis of radiocarbon dates acquired during earlier and recent field seasons at the Keatley Creek site, southern British Columbia. Results indicate that early occupations predating 1900 cal. B.P. occurred, but were not likely associated with population aggregation and large housepits. The aggregated village appears to have emerged by approximately 1700 cal. B.P. and was abandoned at approximately 800 cal. B.P. A break in the occupational sequence is recognized at 1450-1350 cal. B.P. and one other short break may have occurred shortly after 1250 cal. B.P. Peak socioeconomic complexity appears to have been achieved between 1350 and 800 cal B.P. Climatic warming may have provided a selective environment favoring population aggregation and intensification during this time. The final abandonment of the Keatley Creek village appears to have been part of a regional phenomenon suggesting the possibility that climatic factors were important in this case as well.

“Boil them Hearts”

2016 ◽  
Vol 46 (1) ◽  
pp. 50-74
Author(s):  
Jason Redden
Keyword(s):  
Nineteenth Century ◽  
British Columbia ◽  
Indigenous Peoples ◽  
Scholarly Literature ◽  
Material Resources ◽  
Theoretical Inquiry ◽  
Critical Exploration ◽  
Coastal British Columbia ◽  
Academic Study

This paper addresses the academic conversation on Protestant missions to the Indigenous peoples of coastal British Columbia during the second half of the nineteenth century through a consideration of the role of revivalist piety in the conversion of some of the better known Indigenous Methodist evangelists identified in the scholarly literature. The paper introduces the work of existing scholars critically illuminating the reasons (religious convergence and/or the want of symbolic and material resources) typically given for Indigenous, namely, Ts’msyen, conversion. It also introduces Methodist revivalist piety and its instantiation in British Columbia. And, finally, it offers a critical exploration of revivalist piety and its role in conversion as set within a broader theoretical inquiry into the academic study of ritual and religion.

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