Urban politics: Theory and practice

Blair Badcock, Unfairly Structured Cities, Oxford, Basil Blackwell, 1984, pp. 395, $17.95 (paper).

John Halligan and Chris Paris (eds), Australian Urban Politics: critical perspectives, Melbourne, Longman Cheshire, 1984, pp. 247, $12.95 (paper).     

The use of statistical size estimations in minimum number calculations

Analyses of archaeological faunal assemblages often require the use of varied quantitative techniques for reconstructing aspects of the harvested populations. This is particularly important with the increasing use of zooarchaeological data outside of the realm of traditional archaeological inquiry. Detailed size estimations of archaeological faunal specimens can be used to distinguish between the remains of individual animals, aiding in the reconstruction of minimum number calculations. Statistical regression provides a particularly useful technique for generating size estimations which may then be used to calculate such modified MNI values. This paper outlines a methodology for utilising regression estimated sizes in MNI calculations, and tests the methodology in the context of a case study involving fish remains from Aleutian Islands archaeological sites. The use of this methodology to generate modified MNI values results in consistent increases over values calculated using traditional MNI approaches. Such an approach, while more costly in terms of required effort, is felt to be preferable to traditional approaches in contexts where detailed size estimations are usefully calculated to answer other research questions. Copyright © 2005 John Wiley & Sons, Ltd.     

‘You just have to be smart’: spatial practices and subjectivity among women in sex work in London,Ontario

Social science research on the relationship between space and sex work, specifically among women in street-based settings, demonstrates the spatialized nature of risk and how different forms of civic and legal governance contribute to their socio-economic marginalization. However, these studies rarely consider the women’s spatial practices and gendered subjectivities beyond the sex trade, which is problematic because sex work is not their singular life activity or the only impetus for their spatial movements through the urban landscape. Using social mapping and interview data from 33 women in sex work in London, Ontario, this article explores how our participants navigate the spaces where they work and live alongside those regarding health care, social services, violence and places they avoid. Findings reveal that the women traverse diverse spaces as they access health services, especially for crisis issues that necessitate travel to hospitals located beyond the inner city. The spaces used to access social services and those they avoid (i.e. to not be emotionally triggered or under police surveillance) overlap significantly, which presents unique challenges for our participants who depend upon these services for their socio-economic survival. The theoretical contributions these data make to the feminist geography literature on gender and space are discussed, particularly with respect to the issues of nomadic subjectivity and the relationality between city spaces and marginalized bodies.     

Regional ecological variability and impact of the maritime fur trade on nearshore ecosystems in southern Haida Gwaii (British Columbia, Canada): evidence from stable isotope analysis of rockfish (Sebastes spp.) bone collagen

The maritime fur trade (1785–1840s) led to the local extinction of sea otters (Enhydra lutris) in many parts of the northeast Pacific. On the basis of studies of extant sea otter populations, it has been established that they have a disproportionate effect on nearshore ecosystems by limiting sea urchin abundance and facilitating the establishment of nearshore kelp forests; in the absence of sea otters, a local reduction in kelp-derived carbon is therefore expected. We measured the isotopic composition (δ¹³C and δ¹⁵N) of rockfish (Sebastes spp.) bone collagen from late Holocene archaeological sites in southern Haida Gwaii, BC, Canada, using δ¹³C as a proxy for kelp-derived carbon in the diet and δ¹⁵N as a proxy for trophic position. We observed significant spatial variability in rockfish kelp-derived carbon (δ¹³C), but not trophic level (δ¹⁵N). Kelp-derived carbon varied largely as a function of site characteristics (wave exposure), suggesting that local oceanographic conditions are important factors with respect to consumer tissue isotopic compositions. Kelp-derived carbon decreased in post-European contact rockfish relative to pre-European contact rockfish, likely as a result of the reduction of kelp forests associated with the local extirpation of sea otters. Although we detected a reduction in kelp-derived carbon in rockfish diets, we found no shift in trophic level at sites occupied following the maritime fur trade. This implies a shift in local ecosystems, and particularly in carbon sources, following the maritime fur trade, likely due to a trophic cascade resulting from the local extirpation of sea otters. Stability in rockfish trophic levels, however, implies that rockfish continued to feed at similar trophic levels, consuming prey with similar nitrogen isotopic compositions.     

A Late Holocene vertebrate food web from southern Haida Gwaii (Queen Charlotte Islands, British Columbia)

This study presents isotopic data (δ¹³C and δ¹⁵N from bone collagen) for 104 samples representing 29 vertebrate taxa from late pre-contact through to contact era (ca. 2000 – 100 BP) Haida Gwaii (British Columbia, Canada) from a wide variety of mostly marine organisms. The results demonstrate the considerable isotopic variability that characterizes potential prey items in coastal contexts and underscores the need for baseline faunal data to interpret human subsistence practices. Based on these data, a detailed marine food web was constructed, which provides insight into local ecological conditions. We present a simple method for quantifying the trophic level of ancient fauna using δ¹⁵N of bone collagen. Finally, we discuss the implications of this study for the reconstruction of human diet.     

Element localization in archaeological bone using synchrotron radiation X-ray fluorescence: identification of biogenic uptake

Trace element analysis related to archaeological bone is viewed as one way to determine levels of element exposure in past populations. This area of research is complex because there is the potential for the incorporation of trace elements from the burial environment into archaeological bone. We tested the hypothesis that matching the spatial distribution of trace elements within cortical bone with the biological structures would provide evidence of biogenic uptake. We examined samples from a non-segregated Royal British Naval cemetery (1793–1822) in Antigua, West Indies. A key historical question related to this population was the extent of exposure to lead and the resulting health effects. Images from conventional light microscopy (histological) analysis of the bone samples were matched with elemental maps of calcium, strontium, and lead that were created through the use of synchrotron radiation X-ray fluorescence (SR-XRF). Biogenic uptake of both strontium and lead was indicated based on the localization of these trace elements within discreet microstructural elements. The successful integration of histological information with XRF data is a powerful technique for the interpretation of past biological events through trace elements.     

Review Symposium: The Whitlam Government — three views

Gough Whitlam, The Whitlam Government 1972–1975, Ringwood, Penguin/Viking, 1985, pp.788. $40.00 (cloth), $19.95 (paper).     

Historical ecology of late Holocene sea otters (Enhydra lutris) from northern British Columbia: isotopic and zooarchaeological perspectives

We examined the isotopic composition (δ¹³C and δ¹⁵N) of sea otter (Enhydra lutris) bone collagen from ten late Holocene (ca. 5200 years BP–AD 1900) archaeological sites in northern British Columbia (BC), Canada. Because sea otters are now extinct from much of this region and have not fully recolonized their former range (e.g. Haida Gwaii and most of northern BC) these data represent an important first step towards better understanding sea otter foraging ecology in BC. The isotopic data suggest a diet composed primarily of benthic invertebrates, with a very low reliance on epibenthic fish. There is very low isotopic and thus inter-individual dietary variability in Holocene BC sea otters during the late Holocene. Furthermore, zooarchaeological abundance data suggest that otters represented a widespread and significant focus of aboriginal hunting practices on the northern BC coast during the mid- to late-Holocene. The consistent reliance on a small number of low-trophic level prey and limited dietary variability in Holocene BC sea otters may reflect top-down impacts on otter populations by aboriginal peoples. As part of our assessment of sea otter diet, we review trophic discrimination factors (Δ¹³C and Δ¹⁵N) for bone collagen from published literature and find marked variability, with mean values of +3.7 ± 1.6 for Δ¹³C (n = 21) and +3.6 ± 1.3 for Δ¹⁵N (n = 15).