The Australian desert shrubEremophila (myoporaceae): Mmedicinal,cultural, horticultural and phytochemical uses

Traditional, current and potential uses of 83 Eremophila species are documented. In Australia, some Eremophila species are regarded as invasive woody weeds. There are documented cases in which Eremophila species have been reported as poisonous to travelling and drought-stricken stock, but certain species are valued as fodder. Traditionally, this genus has been valued for medicinal and cultural purposes by Aboriginal people. The reported uses as a cure of medical disorders are documented for 18 species. Many of the 210 Eremophila species are recognised for their horticultural potential. They are also useful in revegetation programs because of their drought, fire, frost and grazing tolerances.Eremophila species produce resin, composed of terpenes and flavones, which may be useful in the naval stores industry or as sources for specialty chemicals.     

Factors Related to the Recovery of Subalpine Woodland on Mauna Kea,Hawaii1

We measured mature tree and sapling density, tree associations, crown size, age structure, recovery from ungulate browsing, and grass cover at four study sites in two types of subalpine woodland on Mauna Kea volcano, island of Hawaii. Beginning in 1981, introduced ungulates were reduced in number to allow regeneration of Sophora chrysophylla (mamane) in habitat supporting the endangered Hawaiian finch, Loxioides bailleui (palila). We found Sophora regeneration at all four study sites, but regeneration was higher in mixed species woodland with codominant Myoporum sandwicense (naio) than in areas where Sophora dominated. Regeneration of Myoporum was uniformly very low in comparison. Invasive grass cover, which suppresses Sophora germination, was highest in mid-elevation woodland where Sophora dominated. The distribution of mature and sapling Sophora were both related to study site, reflecting previous ungulate browsing and uneven recovery due to grasses. Densities of Sophora snags were not different among any of the sites, suggesting a more even distribution in the past. Selective browsing before ungulate reduction may have favored Myoporum over Sophora, leading to high densities of mature Myoporum in codominant woodland. After ungulate reduction, however, we found no pattern of competitive inhibition by Myoporum on regeneration of Sophora. Reduction of Myoporum is not likely to enhance habitat for Loxioides as much as supplemental plantings of Sophora, glass control, and continued ungulate eradication. Mid-elevation Sophora woodland areas, where Loxioides forage and nest in high densities, would benefit the most from these management actions.     

Medical ethnobotany of the Albanian Alps in Kosovo

Background

The boreal forest of Canada is home to several hundred thousands Aboriginal people who have been using medicinal plants in traditional health care systems for thousands of years. This knowledge, transmitted by oral tradition from generation to generation, has been eroding in recent decades due to rapid cultural change. Until now, published reviews about traditional uses of medicinal plants in boreal Canada have focused either on particular Aboriginal groups or on restricted regions. Here, we present a review of traditional uses of medicinal plants by the Aboriginal people of the entire Canadian boreal forest in order to provide comprehensive documentation, identify research gaps, and suggest perspectives for future research.

Methods

A review of the literature published in scientific journals, books, theses and reports.

Results

A total of 546 medicinal plant taxa used by the Aboriginal people of the Canadian boreal forest were reported in the reviewed literature. These plants were used to treat 28 disease and disorder categories, with the highest number of species being used for gastro-intestinal disorders, followed by musculoskeletal disorders. Herbs were the primary source of medicinal plants, followed by shrubs. The medicinal knowledge of Aboriginal peoples of the western Canadian boreal forest has been given considerably less attention by researchers. Canada is lacking comprehensive policy on harvesting, conservation and use of medicinal plants. This could be explained by the illusion of an infinite boreal forest, or by the fact that many boreal medicinal plant species are widely distributed.

Conclusion

To our knowledge, this review is the most comprehensive to date to reveal the rich traditional medicinal knowledge of Aboriginal peoples of the Canadian boreal forest. Future ethnobotanical research endeavours should focus on documenting the knowledge held by Aboriginal groups that have so far received less attention, particularly those of the western boreal forest. In addition, several critical issues need to be addressed regarding the legal, ethical and cultural aspects of the conservation of medicinal plant species and the protection of the associated traditional knowledge.     

Epidemiology of severe trauma among status Aboriginal Canadians: a population-based study

Background

Aboriginal Canadians are considered to be at increased risk of major trauma. However, population-based studies characterizing the distribution, determinants and outcomes of major trauma in this group are lacking. We sought to measure the impact of ethnicity, as reflected by Aboriginal status, on the incidence of severe trauma and to broadly define the epidemiologic characteristics of severe trauma among status Aboriginal Canadians in a large health region.

Methods

This population-based, observational study involves all adults (people ≥ 16 years) resident in the Calgary Health Region between Apr. 1, 1999, and Mar. 31, 2002. Stratification of the population into status Aboriginal Canadians and the reference population was performed by Alberta Health and Wellness using an alternate premium arrangement field within the personal health care number. Injury incidence was determined by identifying all injuries with severity scores of 12 or greater in the Alberta Trauma Registry, regional corporate data and the Office of the Medical Examiner.

Results

Aboriginal Canadians were at much higher risk than the reference population in the Calgary Health Region of sustaining severe trauma (257.2 v. 68.8 per 100 000; relative risk [RR] 3.7, 95% confidence interval [CI] 3.0–4.6). Aboriginal Canadians were found to be at significantly increased risk of injuries resulting from motor vehicle crashes (RR 4.8, 95% CI 3.5–6.5), assault (RR 11.1, 95% CI 6.2–18.6) and traumatic suicide (RR 3.1, 95% CI 1.4–6.1). A trend toward higher median injury severity scores was observed among Aboriginal Canadians (21 v. 18, p = 0.09). Although the case-fatality rate among Aboriginal Canadians was less than half that in the reference population (14/93 [15%] v. 531/1686 [31%], p < 0.0001), population mortality was almost 2 times greater (RR = 1.8, 95% CI 1.0–3.0, p = 0.046).

Interpretation

Severe trauma disproportionately affects Aboriginal Canadians.In Canada, injury is the leading cause of death among people under the age of 45 and the leading cause of potential years of life lost.¹ Although difficult to quantify, the cost of injury was estimated to be at least $12.7 billion in 1998.² Trauma has been known, even in industrialized countries, to disproportionately affect the most marginalized members of society.³ Aboriginal Canadians are considered to be particularly at risk, and data showing alarming patterns of trauma mortality in this group are beginning to emerge. Unfortunately, the number of studies looking at injury risk among Aboriginal Canadians is small,⁴ and little attention has been paid to quantifying the risk of nonfatal injury. Better understanding of the nature of trauma risk and outcome among Aboriginal Canadians could lead to more effective prevention and treatment strategies.In this study, we used a population-based design in an attempt to quantify the impact of injury, both fatal and nonfatal, on the Aboriginal community in a large, heterogeneous Canadian region with over 1 million urban and rural inhabitants. We sought to measure the impact of ethnicity (defined by registered status within the definition of the Indian Act⁵) on the incidence of severe trauma and to broadly define the epidemiologic characteristics of severe trauma among status Aboriginal Canadians.     

The appropriation of an Aboriginal landscape in northern New South Wales

The attachment of Australian Aboriginal people to land has not only been amply documented by anthropologists since the late 19^th century, it is also one of their own enduring tropes of differentiation from non‐Aboriginal and “official” Australian state society. In the face of widespread and concerted alteration of the pre‐settlement landscape engendered by industrial and commercial development, Aboriginal people seek to reclaim or reappropriate remnants of a pristine environment untransformed by modern development. Alteration of the landscape, as far as Aboriginal people are concerned, also goes hand in hand with the progressive decimation of Aboriginal populations in the 19^th and early 20^th centuries through violence and disease. Contemporary Aboriginal communities seek to protect the sites of violent death, believed heavily populated with the frustrated spirits of the deceased, from disturbance, particularly by non‐Aboriginal people. In this chapter I discuss some of the anthropological implications of seeing landscape as a terrain of intercultural conjunction in such a bifold society in northern New South Wales, and what levels of transformation are and are not acknowledged by a marginal, minority indigenous population seeking to insulate their historical landscape from development.     

Aboriginal preparation ofCycas seeds in Australia1

The seeds of cycad plants are a toxic food used by many Aboriginal groups in northern Australia. Acute symptoms produced after consumption of untreated Cycas seeds are due to azoxyglycosides, especially cycasin, although the toxic dose depends on the animal species tested. There are three traditional methods used to treat these seeds: brief leaching in water; prolonged leaching in water; and aging. Aboriginal people living at Donydji outstation in northeast Arnhem Land, most regularly consume aged seeds ofCycas angulata R.Br. Analyses of fresh seeds and seeds prepared at Donydji and in the laboratory indicate that cycasin is effectively removed by all the traditional preparation techniques, although each technique has an end product with different storage and handling properties. The social implications of processing need further elaboration, but these techniques have a long history and archaeological remains of seeds in Australia may date back to the Pleistocene.     

Ecohealth and Aboriginal Testimony of the Nexus Between Human Health and Place

The spread of industrial civilizations has been particularly traumatic for the last remaining hunter-gatherer societies. Manifestations of this include expatriation from ancestral lands, sickness, poverty, and environmental degradation. Northern Australia has been no exception despite remaining a stronghold of Aboriginal cultures and still containing vast areas of relatively intact landscapes. Most Aboriginal people reside in remote settlements where they remain on the negative extreme of basic indicators such as life expectancy and educational attainment. In addition, biodiversity declines are being documented from loss of Aboriginal fire management and invasion by feral species. There has been little consideration of potential health, social, economic, or environmental benefits of routinely hunting, gathering or being on their land. This reflects a Western philosophical position that segregates land management and health policy, a view at odds with Aboriginal peoples’ testimony of the indivisibility of people and land. Here we report perspectives from Arnhemland gathered through observation and unstructured and semistructured interviews. Themes that emerged included the high level of detailed, complex knowledge of their traditionally owned lands, the perceived urgency about passing this on to younger people, and the need that both land and people have for each other for the well-being of both. Primary motivations for returning to traditional lands were gathering food, escaping from stresses, and educating young people. The many barriers included no transport, family problems, frequent funerals, and other cultural or family obligations. This work forms part of a larger transdisciplinary research program that aims to inform policy about sustainable futures in northern Australia.     

Recent epidemiologic trends of diabetes mellitus among status Aboriginal adults

Background:

Little is known about longitudinal trends in diabetes mellitus among Aboriginal people in Canada. We compared the incidence and prevalence of diabetes, and its impact on mortality, among status Aboriginal adults and adults in the general population between 1995 and 2007.

Methods:

We examined de-identified data from Alberta Health and Wellness administrative databases for status Aboriginal people (First Nations and Inuit people with treaty status) and members of the general public aged 20 years and older who received a diagnosis of diabetes mellitus from Apr. 1, 1995, to Mar. 31, 2007. We calculated the incidence and prevalence of diabetes and mortality rate ratios by sex and ethnicity in 2007. We examined the average relative changes per year for longitudinal trends.

Results:

The average relative change per year in the prevalence of diabetes showed a smaller increase over time in the Aboriginal population than in the general population (2.39 v. 4.09, p < 0.001). A similar finding was observed for the incidence of diabetes. In the Aboriginal population, we found that the increase in the average relative change per year was greater among men than among women (3.13 v. 1.88 for prevalence, p < 0.001; 2.60 v. 0.02 for incidence, p = 0.001). Mortality among people with diabetes decreased over time to a similar extent in both populations. Among people without diabetes, mortality decreased in the general population but was unchanged in the Aboriginal population (−1.92 v. 0.11, p = 0.04). Overall, mortality was higher in the Aboriginal population than in the general population regardless of diabetes status.

Interpretation:

The increases in the incidence and prevalence of diabetes over the study period appeared to be slower in the status Aboriginal population than in the general population in Alberta, although the overall rates were higher in the Aboriginal population. Mortality decreased among people with diabetes in both populations but was higher overall in the Aboriginal population regardless of diabetes status.The health of Aboriginal people in Canada is generally poorer than their non-Aboriginal counterparts, and diabetes mellitus is a significant contributor.^1,2 Studies have shown that type 2 diabetes and its complications occur at rates two to five times higher in Canada’s Aboriginal population than in the general population.^3–7 In response, diverse diabetes programs have materialized, including various community-based prevention and screening projects.^8–10 The federally funded Aboriginal Diabetes Initiative was created to emphasize health promotion and diabetes prevention.¹¹ In addition, numerous Aboriginal communities have established their own diabetes and health programs.¹²Accurate diabetes surveillance data are essential for governments and health care organizations to plan health care delivery and translate knowledge into policy and funding decisions. However, research into the longitudinal trends of diabetes in Aboriginal populations is scarce. For the most part, data have come from small, community-based studies and self-reported surveys. Population-based studies of primary data are few and have been conducted only for limited periods. Even less is known about outcomes, mortality in particular, among Aboriginal individuals with diabetes.The use of administrative data is becoming more common for tracking diabetes in Canada.¹³ The National Diabetes Surveillance System uses administrative health data to document the burden of the disease, but it has little information on Aboriginal people. Dyck and colleagues recently used the methodology of the National Diabetes Surveillance System to examine the incidence and prevalence of diabetes among Aboriginal people in the province of Saskatchewan,¹⁴ and similar analyses were conducted in Manitoba and Ontario.^15,16As part of the Alberta Diabetes Surveillance System, we conducted this study to compare the incidence and prevalence of diabetes among people 20 years and older in the status Aboriginal population (First Nations and Inuit people with treaty status) and the general population in the province of Alberta between 1995 and 2007. We also compared trends in mortality in the two populations among people with and without diabetes.     

New Genetic and Linguistic Analyses Show Ancient Human Influence on Baobab Evolution and Distribution in Australia

This study investigates the role of human agency in the gene flow and geographical distribution of the Australian baobab, Adansonia gregorii. The genus Adansonia is a charismatic tree endemic to Africa, Madagascar, and northwest Australia that has long been valued by humans for its multiple uses. The distribution of genetic variation in baobabs in Africa has been partially attributed to human-mediated dispersal over millennia, but this relationship has never been investigated for the Australian species. We combined genetic and linguistic data to analyse geographic patterns of gene flow and movement of word-forms for A. gregorii in the Aboriginal languages of northwest Australia. Comprehensive assessment of genetic diversity showed weak geographic structure and high gene flow. Of potential dispersal vectors, humans were identified as most likely to have enabled gene flow across biogeographic barriers in northwest Australia. Genetic-linguistic analysis demonstrated congruence of gene flow patterns and directional movement of Aboriginal loanwords for A. gregorii. These findings, along with previous archaeobotanical evidence from the Late Pleistocene and Holocene, suggest that ancient humans significantly influenced the geographic distribution of Adansonia in northwest Australia.     

Ranking buffel: Comparative risk and mitigation costs of key environmental and socio‐cultural threats in central Australia

Changed fire regimes and the introduction of rabbits, cats, foxes, and large exotic herbivores have driven widespread ecological catastrophe in Australian arid and semi‐arid zones, which encompass over two‐thirds of the continent. These threats have caused the highest global mammal extinction rates in the last 200 years, as well as significantly undermining social, economic, and cultural practices of Aboriginal peoples of this region. However, a new and potentially more serious threat is emerging. Buffel grass (Cenchrus ciliaris L.) is a globally significant invader now widespread across central Australia, but the threat this ecological transformer species poses to biodiversity, ecosystem function, and culture has received relatively little attention. Our analyses suggest threats from buffel grass in arid and semi‐arid areas of Australia are at least equivalent in magnitude to those posed by invasive animals and possibly higher, because unlike these more recognized threats, buffel has yet to occupy its potential distribution. Buffel infestation also increases the intensity and frequency of wildfires that affect biodiversity, cultural pursuits, and productivity. We compare the logistical and financial challenges of creating and maintaining areas free of buffel for the protection of biodiversity and cultural values, with the creation and maintenance of refuges from introduced mammals or from large‐scale fire in natural habitats. The scale and expense of projected buffel management costs highlight the urgent policy, research, and financing initiatives essential to safeguard threatened species, ecosystems, and cultural values of Aboriginal people in central Australia.     

Differences in cancer incidence by age at diagnosis between Aboriginal and non-Aboriginal people for cancer types included in Australian national screening programs

BackgroundThis study examined age distributions and age-specific incidence of screened cancers by Aboriginal status in New South Wales (NSW) to consider the appropriateness of screening target age ranges.MethodsThe NSW Cancer Registry identified invasive (female) breast, cervical and bowel cancers in people diagnosed in 2001–2014.ResultsAboriginal people were younger at diagnosis with higher proportions of breast and bowel cancers diagnosed before the screening target age range (<50 years) compared with non-Aboriginal people (30.6% vs. 22.8%, and 17.3% vs. 7.3%, respectively). Age-specific incidence rate ratios (IRRs) were lower/similar for breast and bowel cancers in younger and higher in older Aboriginal than non-Aboriginal people. All age-specific cervical cancer IRRs were higher for Aboriginal compared with non-Aboriginal people.ConclusionAlthough higher proportions of breast and colorectal cancers were diagnosed before screening commencement age in Aboriginal people, this does not necessarily indicate a need for earlier screening commencement. Other aspects needing consideration include benefits, harms and cost-effectiveness.     

Human impacts on Persoonia falcata. Perspectives on post-contact vegetation change in the Keep River region, Australia, from contemporary vegetation surveys

Persoonia falcata R. Br. and Buchanania obovata Engl. seeds are consistently preserved in abundance from archaeological sites across the Keep River region from 3500 b.p. up until the contact period. Although artefacts continued to be deposited after establishment of the pastoral industry, remains of these two plant species disappear in the upper levels of all excavated deposits. The contemporary vegetation in the vicinity of these sites appears to lack P. falcata, although B. obovata remains in abundance. These observations raise questions regarding (1) the impact of changing land-use and fire regimes, (2) the impact of Aboriginal land management on particular plant species and (3) the reorientation of Aboriginal site use across the region after settlement. These issues are explored in this paper using a comparative analysis of stand structure of the contemporary vegetation around previously excavated sites, as well as from published information on recent regional fire history. Results show improved recruitment of P. falcata (that is, seedlings are recruited into adult life stages) in the only site where Aboriginal people have re-introduced customary management. Both the timing of burning and significant unburnt periods appear important to the post-contact decline and also in the future success of populations of P. falcata in the region.     

Wabusk of the Omushkegouk: Cree-Polar Bear (Ursus maritimus) Interactions in Northern Ontario

In order to understand wabusk (polar bear, Ursus maritimus) behaviours and interactions with people in the Hudson Bay lowlands of northern Ontario we conducted this collaborative study of Cree kiskayndamowin/knowledge. Our findings reveal that Cree knowledge supports previously published information on polar bears, while adding further contextual findings: that male polar bears travel greater distances into the muskeg than previously recorded; that wabusk prey on amisk (beaver, Castor canadensis); that wabusk interact with muskwa (black bears, Ursus americanus); and that human-polar bear interactions occur in this region of northern Canada. Bearing in mind that Cree knowledge has been recognized in wildlife management strategies (i.e., for beaver, caribou and moose) elsewhere in Canada, this particular body of information is timely, especially since polar bears are considered threatened under the Ontario Endangered Species Act, and the province is developing a recovery strategy for the Southern Hudson Bay polar bear population. The federal government is also contemplating listing polar bears in Canada as a “species of special concern” under the Species at Risk Act (SARA). While it is unclear as to how these decisions will impact the Cree-polar interactions, the listing of polar bears by both governments, but especially the provincial government of Ontario, must recognize treaty and Aboriginal rights, acknowledge its duties to consult and properly accommodate Aboriginal people’s views, incorporate Cree kiskayndamowin/knowledge of wabusk, and re-examine the proposed Wabusk Co-Management Agreement draft developed by the Ontario Ministry of Natural Resources (OMNR) and Coastal Cree First Nations of Northern Ontario in 1994. The article provides recommendations that highlight how the Northern Cree First Nations, through the development of the Recovery Strategy for Polar Bear in Ontario, can become engaged in the management of wabusk in Ontario and throughout Canada.     

Appropriateness of current thresholds for obesity-related measures among Aboriginal people

Background

Despite the high prevalence of obesity and diabetes in the Canadian Aboriginal population, it is unknown whether the current thresholds for body mass index and waist circumference derived from white populations are appropriate for Aboriginal people. We compared the risk of cardiovascular disease among Canadian Aboriginal and European populations using the current thresholds for body mass index and waist circumference.

Methods

Healthy Aboriginal (n = 195) and European (n = 201) participants (matched for sex and body mass index range) were assessed for demographic characteristics, lifestyle factors, total and central adiposity and risk factors for cardiovascular disease. Among Aboriginal and European participants, we compared the relation between body mass index and each of the following 3 factors: percent body fat, central adiposity and cardiovascular disease risk factors. We also compared the relation between waist circumference and the same 3 factors.

Results

The use of body mass index underestimated percent body fat by 1.3% among Aboriginal participants compared with European participants (p = 0.025). The use of waist circumference overestimated abdominal adipose tissue by 26.7 cm² among Aboriginal participants compared with European participants (p = 0.007). However, there was no difference in how waist circumference estimated subcutaneous abdominal and visceral adipose tissue among the 2 groups. At the same body mass index and waist circumference, we observed no differences in the majority of cardiovascular disease risk factors among Aboriginal and European participants. The prevalence of dyslipidemia, hypertension, impaired fasting glucose and metabolic syndrome was similar among participants in the 2 groups after adjustment for body mass index, waist circumference, age and sex.

Interpretation

We found no difference in the relation between body mass index and risk of cardiovascular disease between men and women of Aboriginal and European descent. We also found no difference between waist circumference and cardiovascular disease risk among these groups. These data support the use of current anthropometric thresholds in the Canadian Aboriginal population.The Canadian Aboriginal population has undergone a rapid social and environmental transition over the past several decades, which has led to a marked increase in the prevalence of obesity. In the general Canadian population, the prevalence of obesity (body mass index ≥ 30 kg/m²) is 23%;¹ however, the prevalence in the Aboriginal population is double that amount.^2–4 The increased prevalence of obesity among Aboriginal people is important because obesity is an independent risk factor for a number of chronic illnesses.^5,6 Indeed, many of these illnesses are already more common in the Aboriginal population than in other Canadian populations.^3,7Obesity, which is defined as an excess of body fat, is assessed by use of body mass index and waist circumference as indirect measures of total and central adiposity.⁸ Current thresholds for body mass index and waist circumference are based on data predominantly from white people of European descent.^9,10 However, these thresholds may not be suitable for all populations. Specific thresholds have been suggested for Asian people,¹¹ because those of Asian descent generally have more risk factors and a greater amount of body fat and visceral adipose tissue than Caucasians of the same body mass index and waist circumference.^12–17 Specific thresholds may also be required for Canadian Aboriginal people because their ancestors are believed to have come from Asia more than 10 000 years ago.It is unknown whether the current thresholds for body mass index and waist circumference are relevant for Canadian Aboriginal people with respect to body fat distribution and cardiovascular disease risk factors. Thus, we investigated the relation between body mass index and total and central adiposity among people of Aboriginal and European descent. We also investigated the relation between waist circumference and total and central adiposity in these 2 groups. In addition, we examined the prevalence of risk factors among Aboriginal and European people using the current thresholds for body mass index and waist circumference.     

Preparation and use of plant medicines for farmers' health in Southwest Nigeria: socio-cultural,magico-religious and economic aspects

Background

Little is known about the use of bush medicine and traditional healing among Aboriginal Australians for their treatment of cancer and the meanings attached to it. A qualitative study that explored Aboriginal Australians' perspectives and experiences of cancer and cancer services in Western Australia provided an opportunity to analyse the contemporary meanings attached and use of bush medicine by Aboriginal people with cancer in Western Australia

Methods

Data collection occurred in Perth, both rural and remote areas and included individual in-depth interviews, observations and field notes. Of the thirty-seven interviews with Aboriginal cancer patients, family members of people who died from cancer and some Aboriginal health care providers, 11 participants whose responses included substantial mention on the issue of bush medicine and traditional healing were selected for the analysis for this paper.

Results

The study findings have shown that as part of their healing some Aboriginal Australians use traditional medicine for treating their cancer. Such healing processes and medicines were preferred by some because it helped reconnect them with their heritage, land, culture and the spirits of their ancestors, bringing peace of mind during their illness. Spiritual beliefs and holistic health approaches and practices play an important role in the treatment choices for some patients.

Conclusions

Service providers need to acknowledge and understand the existence of Aboriginal knowledge (epistemology) and accept that traditional healing can be an important addition to an Aboriginal person's healing complementing Western medical treatment regimes. Allowing and supporting traditional approaches to treatment reflects a commitment by modern medical services to adopting an Aboriginal-friendly approach that is not only culturally appropriate but assists with the cultural security of the service.     

Niche construction and Dreaming logic: aboriginal patch mosaic burning and varanid lizards (Varanus gouldii) in Australia

Anthropogenic fire is a form of ecosystem engineering that creates greater landscape patchiness at small spatial scales: such rescaling of patch diversity through mosaic burning has been argued to be a form of niche construction, the loss of which may have precipitated the decline and extinction of many endemic species in the Western Desert of Australia. We find evidence to support this hypothesis relative to one keystone species, the sand monitor lizard (Varanus gouldii). Paradoxically, V. gouldii populations are higher where Aboriginal hunting is most intense. This effect is driven by an increase in V. gouldii densities near successional edges, which is higher in landscapes that experience extensive human burning. Over time, the positive effects of patch mosaic burning while hunting overwhelm the negative effects of predation in recently burned areas to produce overall positive impacts on lizard populations. These results offer critical insights into the maintenance of animal communities in the desert, supporting the hypothesis that the current high rate of endemic species decline among small animals may be linked to the interaction between invasive species and mid-century removal of Aboriginal niche construction through hunting and patch mosaic burning.     

New Millennium,New Anthrozoös

Abstract

Published eyewitness accounts and stories from Aboriginal Australians are used to provide an overview of the geographical extent and characteristics of cooperative fishing between Aboriginal Australians and dolphins in eastern Australia. These sources indicate that cooperative fishing was geographically widespread in eastern Australia, involved both bottlenose dolphins and orcas, and had a significance (emotional and spiritual) to Aboriginal people beyond the acquisition of food. These fishing interactions represent both context and precedent for the economic and emotional objectives of contemporary human–dolphin interactions such as dolphin provisioning.     

Incidence and causes of end-stage renal disease among Aboriginal children and young adults

Background:

Although Aboriginal adults have a higher risk of end-stage renal disease than non-Aboriginal adults, the incidence and causes of end-stage renal disease among Aboriginal children and young adults are not well described.

Methods:

We calculated age- and sex-specific incidences of end-stage renal disease among Aboriginal people less than 22 years of age using data from a national organ failure registry. Incidence rate ratios were used to compare rates between Aboriginal and white Canadians. To contrast causes of end-stage renal disease by ethnicity and age, we calculated the odds of congenital diseases, glomerulonephritis and diabetes for Aboriginal people and compared them with those for white people in the following age strata: 0 to less than 22 years, 22 to less than 40 years, 40 to less than 60 years and older than 60 years.

Results:

Incidence rate ratios of end-stage renal disease for Aboriginal children and young adults (age < 22 yr, v. white people) were 1.82 (95% confidence interval [CI] 1.40–2.38) for boys and 3.24 (95% CI 2.60–4.05) for girls. Compared with white people, congenital diseases were less common among Aboriginal people aged less than 22 years (odds ratio [OR] 0.56, 95% CI 0.36–0.86), and glomerulonephritis was more common (OR 2.18, 95% CI 1.55–3.07). An excess of glomerulonephritis, but not diabetes, was seen among Aboriginal people aged 22 to less than 40 years. The converse was true (higher risk of diabetes, lower risk of glomerulonephritis) among Aboriginal people aged 40 years and older.

Interpretation:

The incidence of end-stage renal disease is higher among Aboriginal children and young adults than among white children and young adults. This higher incidence may be driven by an increased risk of glomerulonephritis in this population.Compared with white Canadians, Aboriginal Canadians have a higher prevalence of end-stage renal disease,^1,2 which is generally attributed to their increased risk for diabetes. However, there has been limited investigation of the incidence and causes of end-stage renal disease among Aboriginal children and young adults. Because most incident cases of diabetes are identified in middle-aged adults, an excess risk of end-stage renal disease in young people would not be expected if the high risk of diabetes is responsible for higher overall rates of end-stage renal disease among Aboriginal people. About 12.3% of children with end-stage renal disease in Canada are Aboriginal,³ but only 6.1% of Canadian children (age < 19 yr) are Aboriginal.^4,5A few reports suggest that nondiabetic renal disease is common among Aboriginal populations in North America.^2,6–8 Aboriginal adults in Saskatchewan are twice as likely as white adults to have end-stage renal disease caused by glomerulonephritis,^7,8 and an increased rate of mesangial proliferative glomerulonephritis has been reported among Aboriginal people in the United States.^6,9 These studies suggest that diabetes may be a comorbid condition rather than the sole cause of kidney failure among some Aboriginal people in whom diabetic nephropathy is diagnosed using clinical features alone.We estimated incidence rates of end-stage renal disease among Aboriginal children and young adults in Canada and compared them with the rates seen among white children and young adults. In addition, we compared relative odds of congenital renal disease, glomerulonephritis and diabetic nephropathy in Aboriginal people with the relative odds of these conditions in white people.     

Potential Economic seaweeds of Hengchun peninsula,Taiwan

There are 25 genera and 76 species of economically important marine algae found in the Hengchun Peninsula. The greatest number of useful species is found in the Rhodophyta. Sargassum is the most common genus of the Phaeophyta and has the largest biomass and the widest distribution, but fewer useful species. The local people harvest seaweeds from natural beds for food, fodder, fish bait, fertilizer and medical purposes. However, only a few of the available seaweeds are used and in small quantities. Most of the species are seasonal and more abundant in spring and winter than in the summer. Four genera,Sargassum,Enteromorpha,Ulva andCodium have large standing crops and are widely distributed in the coastal water. Production of the other genera is lower. There are many other useful seaweeds present in this area, some of which are also used as landscape plants in aquaria and as fertilizer in horticulture. The potential commercial uses forHalymenia microcarpa are also briefly discussed.