scholarly journals The recent development of melanism in the larvæ of certain species of Lepidoptera, with an account of its inheritance in Selenia bilunaria esp

1932 ◽  
Vol 111 (770) ◽  
pp. 188-200 ◽  
Keyword(s):  
United States ◽  
Central Europe ◽  
The United States ◽  
Eastern United States ◽  
Evolutionary Processes ◽  
Number Of Species ◽  
The North ◽  
North Eastern ◽  
Geometrid Moth ◽  
State Of Affairs

One of the most remarkable evolutionary processes, the more striking since it has occured before our eyes, has been the rise and spread of melanism and melanochroism amongst the Lepidopetera. Commencing about 1850 in the Manchester area in England with the Geometrid moth Amphidasys betularia L., which yielded the black form carbonaria Jord. ( doubledayaria Mill.), this development has proceeded so rapidly, and become so widespread, that now there is scarcely a country in Northern and Central Europe which does not produce its quota of melanic insects. Moreover, the same state of affairs exists in the North-Eastern United States, although there the number of species affected, up to the present, is not so great as in Europe. Another important feature about these changes lies in the circumstance that, almost uniformly, in Europe and in the United States, the first species to exhibit melanism in any given area have been Amphidasys betularia and Tephrosia crepuscularia . From the beginning, the Geometridæ, more especially the subfamily Boarmiinæ, have provided not only the bulk of the melanic varieties, but also the greatest numbers of individuals. In many areas, as for example in the case of A. betularia and Y psipetes trifasciata , only black examples occur. Nevertheless, other groups include species which have gone black; for instance, the Noctuidæ present black forms of Aplecta nebulosa Hufn., the Cymatophoridæ of Cymatophora or F., the Arctiidæ of Spilosoma lubricipeda L., the Gelechiidæ of Chimabacche fagella F., and so on.

scholarly journals The experience of guestworkers at a United States tourist resort

2013 ◽  
Vol 10 (2) ◽  
pp. 198-228
Author(s):  
Guilherme Mansur Dias
Keyword(s):  
United States ◽  
The United States ◽  
Temporary Employment ◽  
Eastern United States ◽  
Labour Relations ◽  
The North ◽  
North Eastern ◽  
The Us ◽  
Ethnographic Analysis

This article examines temporary employment among foreign workers at the Okemo Mountain Resort, a tourist ski complex located in Vermont state in the north-eastern United States. I discuss the meanings associated with the international displacement of these workers, focusing especially on the ideas and imagery surrounding 'mobility', 'work,' 'travel' and 'youth.' By describing their experiences, along with the practices and discourses of the employer and the US State, the case study shows how Okemo's strategy of hiring a flexible foreign workforce is connected to the multiple meanings through which these groups represent their experience of temporary migration to the United States in the context of increasingly precarious labour relations. The ethnographic analysis proposed by the research provides a counterpoint to the 'macro-analytical' approach employed by most studies on the issue of foreign temporary work in the United States.

Detections of Directional Dynamic Triggering in Intraplate Regions of the United States

2021 ◽  
Author(s):  
Vivian Tang ◽  
Kevin Chao ◽  
Suzan van der Lee
Keyword(s):  
United States ◽  
Surface Waves ◽  
Seismic Activity ◽  
Active Regions ◽  
The United States ◽  
North American Plate ◽  
Western Boundary ◽  
Eastern United States ◽  
Dynamic Triggering ◽  
The North

ABSTRACT We report tremor or local earthquake signals that occurred during the propagation of Love and Rayleigh waves from the 2012 Mw 8.6 Sumatra earthquake in three intraplate regions: Yellowstone, central Utah, and Raton basin (Colorado). These surface waves likely also dynamically triggered seismic activity along the western boundary of the North American plate, and did not trigger seismic activity in the central and eastern United States. We report additional potential dynamic triggering in the three aforementioned intraplate regions by surface waves from 37 additional large earthquakes, recorded between 2004 and 2017. These surface waves’ transient stresses generally appear to trigger tremor in seismically, volcanically, and hydrothermally active regions, such as Yellowstone, if the waves also arrive from favorable directions. These stresses do not appear to be decisive factors for triggering local earthquakes reported for the Raton basin and central Utah, whereas, surface waves’ incidence angles do appear to be important there.

A Sibling Species Group of Hydractinia in the North-Eastern United States

1989 ◽  
Vol 69 (4) ◽  
pp. 857-874 ◽  
Author(s):  
Leo W. Buss ◽  
Philip O. Yund
Keyword(s):  
United States ◽  
Sibling Species ◽  
Host Species ◽  
Larval Dispersal ◽  
Phylogenetic Reconstruction ◽  
Species Group ◽  
Eastern United States ◽  
The North ◽  
North Eastern ◽  
Symbiotic Organisms

Many symbiotic organisms are narrowly distributed on one or a few host species. These associations are intriguing, as they invite the development of hypotheses regarding the pattern and process of speciation and serve as laboratories for the testing of methods of phylogenetic reconstruction (Kraus, 1978; Futuyma & Slatkin, 1983; Stone & Hawks worth, 1986). The evolution of host-specificity in the sea may be expected to be severely constrained by the difficulty of achieving reproductive isolation in taxa whose gametes are freely released into the water column and/or whose larvae are potentially widely distributed (Scheltema, 1977). Yet this difficulty may well be overestimated, given the recent demonstrations of limited gamete (Pennington, 1985; Yund, in press) and larval dispersal (Knight-Jones & Moyse, 1961; Ryland, 1981; Olsen, 1985; Jackson & Coates, 1986; Grosberg, 1987). Indeed, if gamete and larval dispersal are as limited as has recently been contended (Jackson, 1986), local isolation of populations may be a routine occurence, offering repeated opportunities for speciation.

Dependence in Sociology: An Empirical Study of Asian Countries

1981 ◽  
Vol 9 (1) ◽  
pp. 100-122 ◽  
Author(s):  
Krishna Kumar ◽  
Sripada Raju
Keyword(s):  
United States ◽  
The United States ◽  
Asian Countries ◽  
Sociological Knowledge ◽  
The North ◽  
Professional Journals ◽  
The Social ◽  
Six Nations ◽  
Science Community ◽  
State Of Affairs

AbstractSince the late sixties and seventies, there has been a well articulated concern in Asian countries about the "all pervasive" intellectual influence of Europe and the United States on social sciences in general and sociology in particular (Ashraf 1975; Alatas 1972, 1974; Kothari 1968; Kumar 1978; Goonatilake 1975; Singh 1973). A section of the social science community has suggested that while the diffusion of sociological knowledge-frameworks, paradigms, concepts, theories, methodologies, and substantive findings-from Europe and the United States has undoubtedly laid the foundations of sociology in Asia, it has also contributed to her intellectual dependence in the discipline. As a result of this diffusion process, the parameters of sociological reflection and research in Asia are being largely set by sociologists based in the North American and West European nations. Such a state of affairs, according to this view, stifles the creativity of Asian sociologists and comes in the way of the growth of sociological knowledge relevant to their needs and aspirations. The main purpose of the present paper is to examine with empirical data two questions related to the above concern: first, whether there is any intellectual dependence of sociology in Asia on Western nations, particularly the United States; second, whether this intellectual dependence, if it does exist, is increasing or decreasing over time. Bibliometric reference data from professional journals of six nations have been used to investigate these two questions.

Arab gripes pose challenges for Syrian Kurds’ control

2019 ◽  
Keyword(s):  
United States ◽  
Decision Making ◽  
Saudi Arabia ◽  
The United States ◽  
Content Type ◽  
Power Dynamic ◽  
North East ◽  
The North ◽  
North Eastern ◽  
Underlying Causes

Subject Kurdish-Arab tensions in north-east Syria Significance Significant protests between April and June by Arab tribes in north-eastern Syria against Kurdish governance have subsided in north-eastern Syria after Saudi Arabia intervened to encourage de-escalation. However, the underlying causes, including grievances over economic distribution, heavy-handed security methods and a lack of Arab representation in decision-making, have not been resolved. Impacts A deterioration in cooperation between Arab tribes and the SDF may facilitate the operations of IS sleeper cells. The United States and partners will look for further ways to alleviate the concerns of Arab tribes in the area. Ankara and Damascus, which both have designs on the north-east, will play up protests to justify intervention. A mooted Turkish invasion of the border area could radically shift the power dynamic in the region.

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