Canada and Arctic Politics: The Continental Shelf Extension

This article challenges the validity of the commonly held assumption that Canada and other Arctic countries are engaged in a highly competitive scramble to stake claims for extensions to their continental shelves beyond 200 nautical miles, and that Canada may lose out because it is lagging behind in this race to claim as many seabed resources as possible. It argues that the process is orderly; that, under international law, Canada already has sovereign rights over the continental shelf beyond 200 nautical miles; that the process is generally characterized by cooperation; and that the timing of various countries’ submissions to the Commission on the Limits of the Continental Shelf will not be a key determinant of success.     

Diaspora and its discontents: A Caribbean fragment in Toronto in quest of cultural recognition and political empowerment

The essay examines the role of The Ontario Society for Services to the Indo-Caribbean Community [OSSICC], a historic organization that sought to assert the dignity and re-discover the identity of Indo-Caribbean persons as a fragment of the Caribbean diaspora in Toronto, Canada. While it points to the achievement in representing the interests of its members for symbolic cultural recognition, it underscored the limitations in the political arena for empowerment, power sharing, and equality in employment opportunities and for an equitable share of the resources of the state. Further, it describes how the ethnic conflict in the homeland persisted in the new site of the diaspora, about lost opportunities for healing, and about inter-generational discontinuities in the reconstruction of the Caribbean self. On a larger scale, the article is about membership and citizenship in the new homeland of the diaspora, its seductions and betrayals in the new frontier of Canadian multiculturalism.     

The distribution of chydorid Cladocera in Canada

The distribution of chydorid Cladocera in Canada is given based on the examination of 584 samples collected from all the provinces and territories from 1978 through to 1984. Some species show regional distributions, while others are widely distributed. The preferences shown by some species to particular substrates are discussed. Further evidence is presented to show that some taxa previously claimed to be conspecific in Europe and North America may be different. In some instances the adult males tend to be more highly differentiated than the females, particularly in the structure of the postabdomen. The importance of taxonomic and distributional studies in understanding the biogeography of North American chydorids is discussed.     

Comparison of carbon dioxide fluxes over three boreal black spruce forests in Canada

Although mature black spruce forests are a dominant cover type in the boreal forest of North America, it is not clear how their carbon (C) budgets vary across the continent. The installation of an eddy covariance flux tower on an Old Black Spruce (OBS) site in eastern Canada (EOBS, Québec) provided a first opportunity to compare and contrast its annual (2004) and seasonal C exchange with two other pre-existing OBS flux sites from different climatic regions located in Saskatchewan [Southern OBS (SOBS)] and Manitoba [Northern OBS (NOBS)]. Although there was a relatively uniform seasonal pattern of net ecosystem productivity (NEP) among sites, EOBS had a lower total annual NEP than the other two sites. This was primarily because warmer soil under a thicker snowpack at EOBS appeared to increase winter C losses and low light suppressed both NEP and gross ecosystem productivity (GEP) in June. Across sites, greater total annual GEP and ecosystem respiration ( R ) were associated with greater mean annual air temperatures and an earlier beginning of the growing season. Also, GEP at all three sites showed a stronger relationship with air temperature in spring and early summer compared with later in the growing season, highlighting the importance of springtime conditions to the C budget of these boreal ecosystems. The three sites had different parameter estimates describing the responses of R and GEP at the half hour time scale to near surface temperature and light, respectively. On the other hand, the responses of both R and GEP to temperature at the monthly scale did not differ among sites. These results suggest that a general parameterization could be sufficient at coarse time resolutions to model the response of C exchange to environmental factors of mature black spruce forests from different climatic regions.     

Everything and nothing: regulating embryo research in Canada

This article examines how medical and scientific professionals experience and engage with the governance of embryo research in Canada. Drawing on the history of embryo regulation in Canada and the findings of a survey conducted with lab directors in Canadian fertility clinics, we identify a disjuncture between the rules established by legislation, regulations, and research ethics guidelines and the real-life experiences of professionals in the field. This disjuncture, we argue, is the result of both the absence of implementation mechanisms that would give substance to the governing framework, as well as an inability on the part of medical and scientific professionals to engage in robust self-regulation. Overall, we demonstrate that in an ethically charged and highly technical area of policy-making like embryonic research, clarity about the roles and responsibilities of government and professionals in policy-making and implementation is critical to effective governance.     

The flexibility during the juxtaposition of reacting groups and the upper limits of enzyme reactions

The combinations between enzymes and substrates occur only after their reacting groups are in juxtaposition with each other. This will greatly reduce the probability of their effective encounters. However, the results calculated with the finite element method show that the reaction limits will not decrease substantially if van der Waal's forces and a reasonable flexibility during such a juxtaposition are taken into account.     

Politics,Pride, and Precedent: The United States and Canada in the Northwest Passage

The issue of the status of the Northwest Passage has ebbed and flowed in U.S.-Canada relations for decades, but the effect of global warming in the Arctic has moved this issue from the largely academic and legalistic realms to the forefront of bilateral (and international) relations. Intimately linked to Canadian nationalism, U.S. adherence to the doctrine of freedom of the seas, and to politics in both nations, the opposing positions held by the two states can no longer afford to be implacably held. Rather, it is time to put pride and politics aside and return to the “special relationship” between Canada and the United States in order to effect meaningful and mutually beneficial continental security.     

Analysis of mixed leucocyte culture (MLC) reactive cells after in vitro priming. Changes in avidity of T cell receptors.

Mixed leucocyte cultures were examined for populations of T cells responding to secondary stimulation with the priming antigen. Two such populations are described, one of which is stimulated optimally by low, the other by high doses of antigen. Both cell populations are sensitive to anti brain θ serum and complement, but are physically separable by size and by adherence on macrophage monolayers. The anti-brain θ-sensitive population stimulated by low antigen doses consists of larger cells with immunoglobulin-moieties on their surfaces.     

The dilemma posed by minority medical traditions in pluralistic societies: The case of China and Canada

Pluralistic societies such as China and Canada frequently find themselves pursuing potentially contradictory goals. China's contradiction results from a desire to preserve cultural diversity while eliminating ‘backward tendencies’ which work against the economic and social development of the country as a whole. Canada's contradiction results from a desire to preserve cultural diversity while maintaining an emphasis upon equality of rights and responsibilities for all Canadians. Behind these differences in ideology, however, is a more basic structural contradiction ‐ namely, that cultural pluralism, while considered an asset as long as it is restricted to preserving unique cultural traditions, is nevertheless a threat to a strong central government if interpreted to imply the power to set policy at the local level. To explore this issue, this article compares China and Canada in terms of three related topics. First, it briefly examines the multicultural policy of China and Canada. This is followed by a discussion of medical pluralism in China and Canada, with an emphasis upon the health of minority groups and the status of minority healing traditions. Finally, common perceptions of shamanic healing traditions in both China and Canada are considered. It is in relation to shamanism that the dilemma posed by cultural pluralism is most clearly delimited.     

Marine Species at Risk Protection in Australia and Canada: Paper Promises,Paltry Progressions

This article compares the law and policy frameworks for protecting marine species at risk in Australia and Canada. The sea of practical challenges is examined, including achieving listing of threatened commercial species; attaining timely and effective recovery planning; and identifying and protecting critical habitats.     

Regulation of Bt crops in Canada

The Canadian Food Inspection Agency (CFIA) regulates environmental releases of plants with novel traits, which include transgenic plants such as Bt crops. Bt crops are regulated in Canada because they express insect resistance novel to their species. Commercialization of crops with novel traits such as the production of insecticidal Bt proteins requires an approval for environmental release, as well as approvals for use as feed and food. Environmental factors such as potential impacts on non-target species are considered. Insect resistance management (IRM) may be imposed as a condition for environmental release of Bt crops to delay the development of resistance in the target insect. Bt potato and European corn borer-resistant Bt corn have been released with mandatory IRM. The CFIA imposes an IRM plan consisting of appropriate refugia, education of farmers and seed dealers, and monitoring and mitigation. Industry, regulators, government extension staff and public researchers provide expert advice on IRM.     

The great transformation: A long-run perspective on physical well-being in Canada

During the 19th century the physical stature of the Canadian-born stagnated or declined slightly in spite of a substantial increase in income. Stature varied regionally within Canada. The Quebec population was especially short; men in the Atlantic coastal region were taller than their low incomes would lead us to expect. Heights increased dramatically in the 20th Century. The pattern of long-run change is consistent with evidence of age-specific mortality and with the relationship between income and physical well-being envisaged by Preston [Preston, S., 1975. The changing relationship between mortality and the level of economic development. Popul. Stud. 29, 231-248]. The transition from stagnant or declining stature to secular increase points to a dramatic shift ca. 1900 in the evolution of the physical standard of living in Canada.     

A history of physical anthropology and the development of evolutionary thought in Canada

Canada is a large country geographically, but relatively small in terms of population. As a result, our major problem has always been communication. It is expensive and time consuming to get together to discuss problems. For example, a scholar in Newfoundland would find Prague to be as far away as a visit to a university in her own country (British Columbia). Then too, communication is often confounded by language because we are a bilingual country, but relatively few people speak both languages. Understandably, then, it is very difficult to speak of a national identity on such a topic as human evolution. Rather, we find that individuals have influenced the field either through their research or through their teaching. Academic development has been strongly influenced in the past by developments in the United States and Europe, particularly the United Kingdom. Nevertheless, we will attempt to trace the development of evolutionary throught, but not without a preliminary apology for oversights to our colleagues. The task is difficult, and we will surely overlook some names. We hope that our attempt will still be accurate in the wholistic sense. Regardless of the foregoing problems, we do see a broad historical development and the beginning of a Canadian perspective. This is more clearly seen if we trace the development of evolutionary thought within the context of the history of physical anthropology in Canada.     

The exchange hypothesis for the formation of chromatid aberrations: an experimental test using bleomycin

The association between bleomycin-induced chromatid aberrations and BUdR-label exchange between sister chromatids was investigated in order to evaluate Revell's exchange hypothesis for the formation of chromatid aberrations. The results of this study indicate that a larger than expected proportion of chromatid breaks can be accounted for by the exchange hypothesis though not all breaks are the result of incomplete exchange.     

Gender expectations: natural bodies and natural births in the new midwifery in Canada

In this article, I examine the meaning of natural bodies and natural births in contemporary midwifery in Canada and explore the impact of these central concepts on the embodied experiences of pregnant and birthing women. The ideal of a natural birth has been used as a successful rhetorical strategy in scholarly and popular feminist works on childbirth to counter and critique the predominant biomedical or "technocratic" model of the pregnant and birthing body as inherently problematic and potentially dangerous to the fetus. Contemporary Canadian midwifery--which only as recently as 1994 made a historic transition from a grassroots social movement to a full profession within the public health care system--continues to work discursively through the idiom of nature to affect women's knowledge and experience of their bodies and selves in pregnancy and birth. However, my key finding in this ethnographic study, which focused primarily on midwifery in the province of Ontario in the years following professionalization, is that natural birth is being redefined by the personal, political, and pragmatic choices of midwives and their clients. I argue that the construction, negotiation, and experience of natural birth in contemporary midwifery both reflects and promotes a fundamental shift away from essentialized understandings as it makes room for biomedical technology and hospital spaces, underpinned by the midwifery logics of caring and choice. Natural birth in this context also carries important cultural messages--gender expectations--that posit women as persons and bodies as naturally competent and knowing.     

Transgenic Technology meeting 2008 in Toronto, Canada: a meeting report

In a history that goes back to 1999, the Transgenic Technology meetings started out in Sweden and over the years began to attract a growing community of technicians and researchers mainly from Europe. As the meetings started to attract an expanding worldwide audience, the community decided to found the International Society for Transgenic Technologies at the Barcelona meeting in 2005. The 2007 convention was held at Brisbane, Australia, and in 2008, the 8th Transgenic Technology meeting was held for the second time on behalf of ISTT and for the second time outside of Europe in Toronto, Canada. Due to its excellent program with over 400 participants the meeting was able to attract the highest number of delegates of all past TT meetings. With extended times for plenary discussions about technical and organizational aspects, as well as top level scientific presentations, both technicians and scientists enjoyed this as an extremely fruitful meeting from which they could take home solutions for daily routines as well as new insights and ideas for coming projects.     

Evidence for large-scale effects of competition: niche displacement in Canada lynx and bobcat

Determining the patterns, causes and consequences of character displacement is central to our understanding of competition in ecological communities. However, the majority of competition research has occurred over small spatial extents or focused on fine-scale differences in morphology or behaviour. The effects of competition on broad-scale distribution and niche characteristics of species remain poorly understood but critically important. Using range-wide species distribution models, we evaluated whether Canada lynx (Lynx canadensis) or bobcat (Lynx rufus) were displaced in regions of sympatry. Consistent with our prediction, we found that lynx niches were less similar to those of bobcat in areas of sympatry versus allopatry, with a stronger reliance on snow cover driving lynx niche divergence in the sympatric zone. By contrast, bobcat increased niche breadth in zones of sympatry, and bobcat niches were equally similar to those of lynx in zones of sympatry and allopatry. These findings suggest that competitively disadvantaged species avoid competition at large scales by restricting their niche to highly suitable conditions, while superior competitors expand the diversity of environments used. Our results indicate that competition can manifest within climatic niche space across species’ ranges, highlighting the importance of biotic interactions occurring at large spatial scales on niche dynamics.     

Inside the black box: affirmative action and the social construction of race in Brazil

The recent adoption of race-targeted public policies makes Brazil an insightful place to study the social construction of race. This article estimates the effect of racial quotas in college admissions on patterns of racial identification. The authors collected data on persons who matriculated before and after the implementation of quotas at the University of Brasilia, which reserved 20% of admissions slots for persons who self-identified as black. A baseline survey was conducted during college and a follow-up survey was conducted post-college. In sum, the findings suggest that racial quotas had inspired a persistent shift in racial identification from non-black to black and from lighter to darker racial categories. As a whole, the evidence indicates that the policy induced race-making boundary effects, which broadly confirms the insights of social constructionist theories.     

Prevalence of weather sensitivity in Germany and Canada

Several studies have shown that atmospheric conditions can affect well-being or disease, and that some individuals seem to be more sensitive to weather than others. Since epidemiological data on the prevalence of weather-related health effects are lacking, two representative weather sensitivity (WS) surveys were conducted independently in Germany and Canada. The objectives of this paper are: (1) to identify the prevalence of WS in Germany and Canada, (2) to describe weather-related symptoms and the corresponding weather conditions, and (3) to compare the findings in the two countries. In Germany 1,064 citizens (age >16 years) were interviewed in January 2001, and in Canada 1,506 persons (age >18 years) were interviewed in January 1994. The results showed that 19.2% of the German population thought that weather affected their health to a strong degree, 35.3% that weather had some influence on their health (sum of both = 54.5% weather sensitive), whereas the remaining 45.5% did not consider that weather had an effect on their health status. In Canada 61% of the respondents considered themselves to be sensitive to the weather. The highest prevalence of WS (high + some influence) in Germans was found in the age group older than 60 years (68%), which was almost identical in the Canadian population (69%). The highest frequencies of weather-related symptoms were reported in Germany for stormy weather (30%) and when it became colder (29%). In Canada mainly cold weather (46%), dampness (21%) and rain (20%) were considered to affect health more than other weather types. The most frequent symptoms reported in Germany were headache/migraine (61%), lethargy (47%), sleep disturbances (46%), fatigue (42%), joint pain (40%), irritation (31%), depression (27%), vertigo (26%), concentration problems (26%) and scar pain (23%). Canadian weather-sensitive persons reported colds (29%), psychological effects (28%) and painful joints, muscles or arthritis (10%). In Germany 32% of the weather-sensitive subjects reported themselves to be unable to do their regular work because of weather-related symptoms at least once in the previous year, and 22% of them several times. Co-morbidity was significantly higher in weather-sensitive subjects both in Germany and Canada. These results clearly showed the important impact of WS on public health and the economy. These findings prompted us to start studies on the causal factors of weather-related health effects.