Allelic melanism in American and British peppered moths

Parallel evolutionary changes in the incidence of melanism are well documented in widely geographically separated subspecies of the peppered moth (Biston betularia). The British melanic phenotype (f. carbonaria) and the American melanic phenotype (f. swettaria) are indistinguishable in appearance, and previous genetic analysis has established that both are inherited as autosomal dominants. This report demonstrates through hybridizations of the subspecies and Mendelian testcrosses of melanic progeny that carbonaria and swettaria are phenotypes produced by alleles (isoalleles) at a single locus. The possibility of close linkage at two loci remains, but the simpler one-locus model cannot be rejected in the absence of contrary evidence.     

Late Ordovician extinction of North American and British crinoids

After reaching a diversity peak in the Caradocian, North American Ordovician crinoids underwent a gradual decline to a nadir in the early Ashgillian (Maysvillian). This interval, recording extinction of the Cleiocrinidae, Merocrinidae, Ottawacrinidae, Hybocystitidae, and several lineages of camerate crinoids, was apparently caused by major environmental shifts in seas of eastern North America resulting from a westward-prograding wedge of terrigenous clastics derived from the Taconic Highlands, possibly coupled with a marine transgression in the Maysvillian that allowed colder water slope biofacies to invade the craton. Crinoids suffered a major episode of extinction in the late Ashgillian (late Richmondian/Rawtheyan). This event, preceding the end of the Ordovician by at least one stage or 2 to 4 million years, resulted in extinction of 12 families of crinoids including the Xenocrinidae, Tanaocrinidae, Reteocrinidae, Archaeocrinidae, Anthracocrinidae, Cincinnaticrinidae, Iocrinidae, Anomalocrinidae, Carabocrinidae, Cupulocrinidae, Porocrinidae, and Hybocrinidae. Glacio-eustatic lowering of sea level may have triggered this crisis by partially draining the North American craton, resulting in changes in oceanic circulation, salinity, and temperature. Latest Ordovician (Hirnantian) carbonates of the North American mid-continent region contain pelmatozoan assemblages from which Silurian crinoids radiated. These taxa were largely unaffected by a minor extinction event at the Ordovician/Silurian boundary.     

An appraisal of the American and British health-care systems.

1. A dispassionate comparison of the British and American systems of medical care using conventional guidelines (structure, process, and outcomes) as applied to acknowledged national problems in health and medical care (expense, quality, and distribution) has been made. 2. Dissimilarities in the size of the countries, in the attitudes of physicians, and in homogeneity of populations make it unlikely that the two countries should have identical medical-care systems. 3. The "good features" of the NHS, which by implication might benefit the American system if adopted, are seen to be overshadowed by weakness: a) Relative expensiveness or extravagance of American medicine is seen as underfinancing of the British system. b) Quality of care in Britain is threatened by lack of professional stimulation of generalists, inadequate facilities, and rationing of medical care by prolonged waiting times for elective services. c) Distribution of services is a problem in both countries which will not be corrected by administrative controls but "pegged to incentives" as is true in America. 4. Administrative change in NHS in April 1974 is evidence of internal dissatisfaction. It also demonstrates the need for continual revision of the system; a similar need is made evident by recent legislative proposals in America. 5. Dr. Beeson's final recommendation for voluntary organizational effort by the profession in America has merit.     

南岭地区天牛的研究概况及相关地名拼写总结

本文初步总结了文献记录的南岭地区天牛,计有188属392种,其中70种的模式标本采自南岭地区,隶属于4亚科50属,并提供了模式标本产自南岭地区的天牛名单,包括各种模式标本产地和模式标本存放地信息。因为粤语的发音跟标准普通话相差较大,为了方便同行检索历史文献,本文总结了天牛科里涉及到的南岭地区范围内的地名拼写,共涉及四省16县和两座山。     

Allometry of gill dimensions in some British and American decapod crustacea

The gill areas and their component measurements of 16 species of North American crab and seven species of British decapod crustaceans have been analysed in relation to body mass using the method of logarithmic transformation.
A wide range of relationships was found, each of which is typical for a given species. The slope, b , of the log/log regression lines varied from 0·5 to 1·0, the lower values being most commonly found in the Macrura. For the North American species the average slope is about 0·8 whereas for British brachyurans the relationship was close to linear (b=0·97).
The analysis shows that the increase in gill surface body size is mainly due to the increasing area for individual platelets or gill lamellae.
Comparison of weight-specific gill areas for animals of the same body weight suggests that the most active species have larger gill areas. For some of these species the values (900mm²/g) approximate to those of active fish.
As plots for interspecific relationships derived from average values for many individual species have slopes which are not typical for any of the component species, it is concluded that caution must be exercized when interpreting such interspecific plots in Allometric studies.     

Increases in individualistic words and phrases in American books, 1960-2008

Cultural products such as song lyrics, television shows, and books reveal cultural differences, including cultural change over time. Two studies examine changes in the use of individualistic words (Study 1) and phrases (Study 2) in the Google Books Ngram corpus of millions of books in American English. Current samples from the general population generated and rated lists of individualistic words and phrases (e.g., "unique," "personalize," "self," "all about me," "I am special," "I'm the best"). Individualistic words and phrases increased in use between 1960 and 2008, even when controlling for changes in communal words and phrases. Language in American books has become increasingly focused on the self and uniqueness in the decades since 1960.     

Ethnicity and the British Army in Ireland during the American Revolution

People of German‐speaking background have been permanent residents in Australia and Canada for an extensive period of time and are perceived favourably in these multicultural contexts. This has not always been the case. The event of war has the potential to influence the formation of self‐images and stereotypes of ‘others’ and hence to affect the cohesion of ethnic communities. It follows that altered perceptions of ethnicity are likely to alter the ways governments behave towards ethnic minorities. This, in turn, brings a modification in ethnic relations policy. The focus of this article is to examine official attitudes to Germans resident in these countries and external to them during the second world war and in the immediate post‐war period. A particular concern is that of internment. To look comparatively should develop a deeper understanding of its use in two similar (but also different) commonwealth countries.     

Defining difference: the role of immigrant generation and race in American and British immigration studies

Abstract

This article reviews the ways in which Britain and the USA classify and analyse the integration of immigrants and their descendants. While both societies recognize racial differences in their official statistics and in the academic analyses of change over time, the USA tends to classify immigrants and their descendants by immigrant generation much more than Britain does. The importance of the concept of generation in American immigration research is highlighted and it is suggested that studies built on the importance of generation can illuminate social processes of integration in Britain. The complexities of defining and measuring immigrant generation are reviewed, including new developments in the measurement of generation that take into account age at migration, and historical period and cohort effects. Racial and ethnic minority groups formed through immigration may have very different characteristics depending on the average distance of their members from immigration – including the possibility of ‘ethnic leakage’, as more assimilated, later-generation individuals no longer identify with the group.