This study was designed to examine the effectiveness of a multi-media presentation relating to the topic of employer-supported child care in British Columbia in the business community. Changes in the knowledge and attitude of employers, as measured by a questionaire, were the determinants of the effectiveness of the presentation. Personnel officers from the public and private sector were selected for the study subjects. Support for this study was obtained from a professional association of personnel officers, which offered to host an educational seminar on this topic. This seminar is the treatment of the study and the members of the association who elected to attend this seminar are the subjects. This study was part of a larger study that was a joint research project between the University of British Columbia and Douglas College. Each institution supplied a principal investigator, project personnel and institutional resources. The author of this thesis was the project researcher. Funding for the project was received from the Child Care Initiatives Fund, Health and Welfare Canada. A section of the larger project's findings were extracted for this study. The field of employer-supported child care is relatively recent in Canada. Since 1964 when the Riverdale Hospital opened a child care facility in Toronto, there have been just over one hundred such employer-supported child care facilities set up. Many other companies have set up company-assisted child care options that also fall within the term "employer-supported child care," but no one to date has catalogued the total number of such initiatives. In British Columbia there have been four known employer-supported child care centres; one is no longer in existence. There has been considerable interest and activity in the provincial business community since this study began in 1988. However, other than M. Mayfield's survey of employer involvement in child care in British Columbia in 1984, no research studies have been conducted on this topic. No other known studies are currently taking place, although the Child Care Initiatives Fund, Health and Welfare Canada does list several demonstration projects currently underway across Canada. This study, then, is to develop an effective multi-media presentation relating to employer-supported child care that would educate and influence employers to consider involvement in the child care needs of their employees from an economic perspective. Measurement of knowledge and attitude toward the topic would be taken to determine the effectiveness of this presentation. Results showed that the presentation was effective. Whereas before the seminar 2.5% of the respondents reported their company's level of involvement in child care at the "developing an option" stage, by the conclusion of the seminar, 32.5% of the respondents reported interest at the same level. Responses showed that the perceived obstacles of "lack of evidence of child care services providing long term benefits to the company", "corporate liability", and "equity" were significantly reduced. Employers acquired knowledge about the topic through the seminar. Perceived obstacles were overcome. The respondents were motivated to become involved in employer-supported child care. A need for future studies has been identified from the interpretation of the research results and it is hoped that issues raised from this study will form future research questions. / Education, Faculty of / Graduate

Feed accounts for 40% to 60% of the operating costs of Pacific salmon farms. Presently, commercial diets for Pacific salmon in seawater are formulated according to the nutrient requirements of juvenile chinook salmon and digestibility information derived from studies on rainbow trout in fresh water. Information on feedstuff digestibility by Pacific salmon is completely lacking, regardless of life history stage. Hence, this thesis was undertaken to determine the apparent digestibility of organic matter, crude protein and energy in conventional and novel feedstuffs using post-juvenile chinook salmon (Oncorhynchus tshawytscha) in seawater. The validity of determining apparent nutrient digestibility using the "Guelph system" of fecal collection and chromic oxide (Cr₂O₃) as the indigestible indicator in the diet was assessed in experiment I. In this regard, fecal samples were collected either from a settling column affixed to each novelly designed digestibility tank at 6 and 18 hour intervals or directly from the terminal section of the intestinal tract by stripping or intestinal dissection. Digestibility coefficients were noted to be significantly increased (P<0.001) when the feces remained in the water for 18 hours instead of 6 hours, owing to nutrient leaching. The collection of feces directly from the fish resulted in lower digestibility coefficients than those found when feces were obtained from the "Guelph system". This was attributed to a flaw in the design of the digestibility tank drain system, whereby the feces did not settle quickly into the collection column. The problem was rectified before conducting the subsequent experiments described below. In three additional experiments on chinook salmon in seawater, the overall goal was to ascertain the organic matter, crude protein and energy digestibility coefficients and the digestible energy values for commercial sources of fish meal (herring meal, anchovy meal, menhaden meal, Norwegian low temperature fish meal), poultry by-product meal (two suppliers), feather meal, blood meal, dried whey, canola meal, soybean meal, soybean protein isolate, extruded wheat and wheat middlings. Also, three novel sources of rapeseed protein products (two types of glucosinolate-free canola meal and rapeseed protein concentrate) were evaluated in this regard. The initial minimum size of the chinook in these studies varied between 10.3 g and 40.5 g. The digestibility tank complex consisted of 27 open-circuit 150 L fiberglass digestibility tanks, each supplied with aerated, 8.0°C to 12.5°C filtered seawater at a rate of 6 L/min. The fish were fed by hand twice daily to satiation either a reference diet or a test diet (70% reference : 30% test ingredient). In some instances involving plant protein products, the test ingredient was included at two dietary levels (15% and 30%). Within each test, each diet treatment was assigned to three groups of fish using a completely random or randomized complete block design. Chromic oxide (0.5%) was included in all diets as the indigestible marker. At the end of each experiment, fish were sacrificed and their feces were removed either by stripping or intestinal dissection for comparisons of methodology. In general, the fish meals had higher available energy content for chinook salmon than the other animal and plant protein sources assessed. The importance of screening feedstuffs for potential nutritive value by digestibility measurements was particularly evident from an examination of the digestibility coefficients obtained for menhaden meal versus the other fish meal sources, the two sources of poultry by-product meal, wheat products, canola products and blood meal in this study. The assessment of soybean products, regardless of dietary inclusion level (15% or 30%), could not be ascertained in chinook salmon because of poor diet acceptance. Canola protein sources appear highly promising as partial or complete (in the case of rapeseed protein concentrate) replacements of fish meal, based on digestibility assessment. The use of the "Guelph system" for fecal collection resulted in organic matter digestibility coefficients similar to those obtained by intestinal dissection. Thus, nutrient leaching must have been minimal with the "Guelph system" and it is concluded that this is a satisfactory procedure for digestibility assessment using chinook salmon in seawater. / Land and Food Systems, Faculty of / Graduate

Rocks of the Hadrynian and Early Paleozoic (?) Snowshoe Group comprise the core of the Boss Mountain area at the western margin of the Omineca Belt near Crooked Lake. Structurally overlying these are rocks of the Intermontane Belt: the Permian Slide Mountain Group (Antler Formation), Triassic fine grained sediments (unnamed), and Jurassic volcanic rocks (Takla Group). In the Snowshoe Group, a large, lensoid intrusion of coarse grained granitic rock (Boss Mountain gneiss) was emplaced during the mid-Paleozoic, and later deformed and metamorphosed with the enclosing metasediments. The rocks of the Snowshoe Group act as basement to the overlying Late Paleozoic/Early Mesozoic cover rocks. Within the basement, four phases of regionally significant deformation have been recognized, and are manifest as fold generations designated Fl through F4. Earliest structures, Fl, in the Snowshoe Group are isoclinal folds, accompanied by a transposed foliation of regional extent, which are overprinted by penetrative deformation related to easterly verging F2 nappe structures. The F3 folds are upright or inclined to the northeast, and give a consistent southwesterly sense of vergence. These folds are responsible for the regional map pattern, and have folded both the basement and cover into an antiformal culmination in the Boss Mountain area. Fourth phase structures refold the other features, but do not appreciably affect the F3 geometry. In the cover sequences, the first phase of deformation is equivalent to the second phase within the basement During the Phase 2 deformational episode the cover rocks were emplaced over rocks of the Snowshoe Group. West-dipping imbricate faults characterize the western margin of the area, where basement rocks contain fault-bounded slivers of the cover, and the tectonic contact between basement and cover rocks is marked by a zone of mylonitization. Similarly, the F2 and F3 folding phases in the cover are equivalent to the F3 and F4 structures in the basement, respectively, but are only weakly developed in the cover. An early, enigmatic metamorphic event accompanied Phase 1 deformation in rocks of the Snowshoe Group. Field relations suggest that this was probably coeval with the mid-Paleozoic emplacement of the Boss Mountain gneiss. Metamorphism during the Jurassic was synchronous with F2 deformation in rocks of the Snowshoe Group, and resulted in Barrovian type mineral assemblages ranging from the biotite through sillimanite zones. The metamorphic grade increases from west to east; with only low grade metamorphism of the cover rocks in the study area. Phase 2 structures in the Snowshoe Group were overprinted by the peak of this metamorphic event, as indicated by staurolite through sillimanite zone assemblages. The Boss Mountain area is structurally correlative with rocks of the Shuswap Complex. These rocks appear to comprise a portion of the continental margin sedimentary wedge, which was overridden by an allochthonous terrane accreted to the western margin of North America in post-Early Jurassic times. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

The thesis provides an integrated review and analysis of strategic scientific information from which management procedures for the environmentally acceptable disposal of dredged materials from Greater Vancouver into the Strait of Georgia are determined. An analysis of reported and suspected contamination of Vancouver's waterways identifies trace metals and hydrophobic organic chemicals that warrant concern by authorities responsible for the management of dredged material disposal. The processes, transformations and pathways of these contaminants in the marine environment subsequent to dredged material disposal are reviewed. It is argued that a really confined degradation of suitable disposal sites is of negligible concern, but that release of contaminants from the disposal area, were it to occur, could have unpredictable and perhaps substantial environmental consequences. The major potential pathway of contaminant release from dredged material during or subsequent to disposal is via the resuspension and transport of fine particulate material. Biological accumulation of contaminants and their transport through the food chain is a potentially significant release pathway for hydrophobic organic contaminants. Biological transformation to more soluble metabolites is also potentially significant for mercury and some of the less chlorinated and lower molecular weight organic compounds of concern. Desorptive release of contaminants from the disposed sediments into solution is usually negligible, with the possible exceptions of cadmium and mercury. A review of the physical factors that promote contaminated sediment erosion and dispersion during or subsequent to dredged material disposal identifies oceanographic characteristics where such release will be minimal. There are only four areas within the Strait of Georgia that exhibit these characteristics. Two of these areas are adjacent to valuable and sensitive biological resources and are consequently unsuitable as ocean dumping sites. Dredged material disposal at the other two sites, one near Smelt Bay, Cortes Island, and the other off McNaughton Point, Sechelt Peninsula, should result in minimal adverse environmental impact. Available methodologies to identify dredged materials with contaminant levels that preclude their environmentally acceptable disposal at these recommended sites are discussed. / Science, Faculty of / Resources, Environment and Sustainability (IRES), Institute for / Graduate

Understanding the impact which grazers have on their prey is of vital importance in understanding how aquatic ecosystems function. In an attempt to contribute to this understanding, this study examined, at three levels, the effects of zooplankton on phytoplankton biomass in Placid Lake in summer. Examination of selective feeding by the major herbivorous zooplankton species in in situ enclosures revealed that single phytoplankton cells in the range of 6-20 μm long were the preferred food of these organisms. Colonial algae, when dominated by the cyanophyte Merismopedia, did not appear to be grazed. The effect of zooplankton biomass on phytoplankton biomass was examined in in situ enclosures. Generally, phytoplankton biomass decreased only in enclosures where initial zooplankton biomass was very low or very high. A simple model based on the classical logistic model of predator-prey interactions was developed to explain events in the enclosures. I concluded that in summer, Placid Lake phytoplankton depend on nutrients remineralized by zooplankton for growth. Grazing appears to be an important regulating mechanism of the phytoplankton standing crop in the spring but not summer. A third level of study involved examination of the responses of phytoplankton to lake perturbation, namely removal of zooplankton, compared to plankton patterns in previous and subsequent years. In years lacking zooplankton manipulation, major increases in zooplankton biomass in mid spring were followed by phytoplankton biomass increases in late spring. During the first harvesting season, July and August 1979, a 50% reduction in zooplankton biomass was obtained. An enormous bloom of the inedible Merismopedia developed. I hypothesized that removal of zooplankton caused a shortage of available biologically reactive nitrogen which became limiting to eukaryotic phytoplankton, allowing Merismopedia, a blue-green alga which may be able to fix nitrogen, to thrive. In summer, the positive effect of zooplankton on phytoplankton via nutrient remineralization appeared to be more significant than the negative effect of grazing. During the second harvesting season, May, June, and July 1980, no decrease in zooplankton biomass was apparent. Instead of the usual pattern of zooplankton biomass increase preceeding the phytoplankton biomass increase, both increases occurred simultaneously. I concluded that harvesting delayed the rise in zooplankton biomass and decreased the grazing pressure on phytoplankton, allowing it to peak earlier. Grazing may thus be significant in spring in slowing phytoplankton growth. Seasonal variations were introduced to the model for the enclosure experiments to help understand the normal plankton patterns in Placid Lake. The time lag between maximum solar radiation and lake temperature, and the effects of these two physical parameters on phytoplankton and zooplankton growth appear to be instrumental in establishing the pattern of plankton biomass dynamics observed in Placid Lake. / Science, Faculty of / Zoology, Department of / Graduate

The phenomenon of snow interception by forest stands is examined. Interception relationships extracted from literature are evaluated for their applicability to the silvicultural and climatic conditions of south coastal British Columbia. Hypotheses tested address: 1) the prediction of snow interception, 2) comparisons of heterogeneity in snow interception between second-growth and old-growth forests, and 3) how interception and interception efficiency vary depending on forest crown completeness and storm size. General relationships regarding snow interception under continental conditions were found to hold in coastal conditions', but relationships between crown completeness and interception were weak. Storm size and melt are identified as confounding factors in making predictions about snow interception based on stand crown completeness. Several approaches to modelling snow interception are discussed. Particular reference is made to the effect of interception on energetic costs of locomotion for deer. Management of coastal forests for the interception of snow should focus on maximizing crown completeness and crown surface area. Further research is required concerning the relationships used in the simulation models. Emphasis should be placed on deer response to snowpacks, the influence of melt on snowpack development, and the influence of canopy closure on spatial distribution of snowpacks. / Forestry, Faculty of / Graduate

The purpose of this thesis is to evaluate alternative processes for resolving conflicts between mineral development, and park preservation interests in British Columbia. The peculiarities and variation within the generic conflict illustrate the divergence between two main interest groups, and the representative provincial resource agencies. A brief examination of eight cases demonstrates the conflict is manifest with different intensities, over a wide time range, and with geographic variety. By comparing the supposed weakness of the litigation model and the claimed advantages of the bargaining model for processing of conflict to resolution, five criteria for efficiency are developed: time and delay; cost; capacity for technical issues; opportunity for participation; and flexibility of outcomes. Examples of conflict dialogue illustrate cognitive, value, interest and behavioral conflict in the parks / mines situation with the aim that the reader and the researcher can have a communality of experience and tools for understanding in assessing the detailed case evidence. Detailed examination of the Wells Gray Provincial Park case and Chilko Lake Wilderness Park Proposal illustrate strong British Columbia examples of both litigation and bargaining models under the same time and political circumstance. Not all of the allegations of strength or weakness are substantiated in either case. The promise demonstrated in the unstructured version of bargaining found in the Chilko example may be improved through innovation and commitment. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate

In 1982/83, the author, in the role of consultant to the firm of Thompson Berwick Pratt and Partners, Architects and Planners, Vancouver, conducted a regional health needs study In the interior of British Columbia for the Board of the Thompson-Nicola Regional Hospital District (TNRHD). The completed report entitled, The Thompson-Nicola Regional Hospital District Health and Hospital Study has subsequently been tabled as a public document. This planning thesis is concerned with the processes of conducting the study which was more complex than originally envisaged. The narrative describes the planning model developed by the consultants to fit the terms of reference which were, in brief, to assess existing local health service needs and the supply and distribution of health resources in the region, and to project future requirements through 1991. In attempting to develop the model it was realized that the Thompson-Nicola Regional Hospital Board had limited powers to initiate a study for all health and hospital providers in the region. The Board's planning mandate was limited by statute, and this limitation is explored. Co-operation among local providers was achieved through persuasion. The Ministry of Health (MOH) had funded 60 per cent of the project, thereby indicating to local groups that it supported the Board's planning approach. The Ministry of Health's concern for rational planning has already been expressed in other ways (e.g. The British Columbia Hospital Role and Funding Studies) although planning is still ad hoc rather than part of a clear Ministry policy. The lack of integration among providers made it difficult to determine need and demand for health services in the region. There were specific problems of definition of need, and specific and recurrent problems of data collection and analysis because of the large number of independent data resource groups involved. Problems in selecting and applying models of analysis were also experienced. Nevertheless, a model of health services needs and resource requirements was constructed. / Medicine, Faculty of / Population and Public Health (SPPH), School of / Graduate

There has been much discussion of the merits and limitations of area licensing, i.e., a fishery management tool which restricts fishermen to certain geographic areas, in the British Columbia," Canada, salmon fishery. To date there has been little formal evaluation of the implications of this policy tool for salmon fishery management. In the reports by Pearse (1982), Sinclair (1978) and Fleet Rationalization Committee (1982) some insights on the subject are provided, but an evaluation in terms of specific criteria is lacking. This study evaluates five area licence configurations in the context of the B.C. salmon fishery. They are assessed based on evaluative criteria that cover the following subject areas: management operations; socio-economic effects; biological effectiveness; and economic efficiency. Each of these broad subjects are factored into specific elements, in which the emphasis is on the nature of the fishery and the resource. From the analysis it was found that the area licence configurations that factored the coast into two large harvest areas or the configuration that alienated small area(s) as test area(s) are most appropriate for the fishery. These configurations facilitated the attainment of management operations, socio-economic and biological goals, but not the economic efficiency goals. The other configurations, in particular those that factor the coast into a number of smaller harvest areas, result in exacerbating the problems with all criteria except economic efficiency and some biological factors. The appropriate area configurations for the B.C. salmon fishery would be the configurations that factors the coast into two large harvest areas; or the configuration where two or three small harvest areas are alienated from the existing harvest area. There are three fundamental reasons for this: (1) they are least disruptive (i.e., minimum impact on present harvest patterns, least politically sensitive, and minimum distributional effects); (2) they offer greatest flexibility to address political, economic, biological and social uncertainties; and (3) these area configurations provide the greatest ease of implementation and incremental adjustment of the status quo. Acceptance of these configurations will depend on the time horizon and the objectives of the decision makers. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate

This thesis addresses the problem of resource town instability and focuses on resource settlement planning, assuming that a stable resource community is dependent on the settlement planning approach. The problem is addressed through the development of a new theoretical approach. It stems in part from a synthesis of the two dominant perspectives in the literature on resource towns --the "internal" and the "external" perspective. The internal perspective is expressed in the traditional resource settlement literature. Its goal is a stable labour supply to be attained by a focus on the physical and social attributes of the towns. This literature assumes a stable workforce stems from a stable community which can be achieved through physical and social planning applied at the community level. The external perspective is expressed by the critical resource settlement literature. Its goal is stable labour demand to be attained by a radical restructuring of the regional and provincial economy. The critical literature assumes that the long term stability of a resource community's employment base is dependent on fluctuating external markets over which the community has no control. The flaw of the internal perspective is its failure to address the need for long term stable labour demand. The external perspective is flawed by the absence of a policy prescription for settlement planning. The research methods comprise a review of the literature on planning theory, resource settlement planning and regional development. The proposed perspective is elaborated through a comparison of theoretical concepts with current British Columbia provincial policy as manifest in three recent applications; Elkford, Tumbler Ridge and Northwestern British Columbia. The result is a synthesis of the internal and external perspectives providing an alternative resource settlement planning approach which addresses resource community stability in the long as well as the short term. The salient points of the proposed resource settlement planning approach are-. • A territorial rather than a functional interpretation of regional development and settlement planning based on: - an internal regional focus for development which utilizes local social and economic goals; - a composite interpretation of the region, comprised of social, cultural, physical and economic dimensions; - a conservationist approach to resource use; and - a long run perspective in evaluating development. • The replacement of the goal of community stability by the goal of regional resilience. A resilient region is comprised of economically, socially and politically interlinked settlements which jointly serve the region's population; • A strategic planning process which employs bottom up representation involving local institutions and interest groups. The Elkford and Tumbler Ridge case studies indicate that the current provincial policy; 1. Relies on a strategic planning process, 2. attempts to move towards bottom up representation in implementing settlement plans and 3. is effective in creating short term community stability. But the current policy has not addressed long term stability. The territorial regional settlement planning approach developed in this thesis was tested for Northwest British Columbia. Suggested "ideal" planning actions for Northwest British Columbia are: • A shift in focus from examining settlement options which will best serve mining interests to an analysis of how mining can best serve regional development; • A development strategy which looks at alternative forms of development and the relationship between them and the mining proposals; • The use of the mine projects to encourage economic and social diversification in existing settlements in the southern part of the northwest region; • Greater use of local institutions and interest groups in the planning and implementation phase; and • The use of regionally based criteria in examining the settlement options. Given existing provincial resource settlement policies, two steps can be taken to move towards a territorial regional approach to resource settlement planning: 1. use and build upon existing settlement systems, and 2. use resource projects to foster regionally based economic diversification by planning ahead. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate