Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Species at Risk"”.
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Living on the Edge: Conservation of Fish Species at Risk in Canada
Many species in North America range northward and barely into southern Canada. Some of these species are classified as species at risk and afforded legal protection in Canada, yet the decision to protect these populations at the edge of their range is controversial. To determine if edge populations …
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Keeping up with the feds: The provincial response to Canada's Species at Risk Act
This thesis examines how the threat of federal intrusion into provincial jurisdiction over natural resource management which accompanied the development and passage of Canada's Species at Risk Act (SARA) has impacted provincial legislation and policies aimed at protecting endangered species. SARA's …
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As We Move Ahead Together: Foregrounding Reconciliating and Renewed First Nation/ Non-Aboriginal Relations in Environmental Management and Research
The research project upon which this dissertation is based focused on enhancing understandings of the nature of current First Nations/non-Aboriginal relations in environmental management. The project was undertaken as a collaborative initiative by the author, a non-Aboriginal doctoral researcher, …
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Strategic Concessions: Negotiating Human Land Use to Serve the Habitat Needs of the Eastern Meadowlark
Our civilization is facing increased populations and scarcity of habitat for a variety of species. Encroaching on these landscapes while engaging in habitat fragmentation and destruction, has negatively impacted biodiversity and subsequently put thousands of species at risk of going extinct. With …
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A reassessment of the conservation status of a rare Florida endemic mint, Macbridea alba
Plants are foundational to the planet’s biodiverse ecosystems and despite their critical role in successful conservation and restoration efforts, plants lack adequate protection. At least 40% of all vascular plants on Earth face increased global risk of extinction. Effective conservation is often …
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Embryotoxicity of dioxin-like chemicals extracted from American eels (Anguilla rostrata) from the St. Lawrence River System
The American eel (Anguilla rostrata) has suffered a serious population decline in Lake Ontario since the early 1980s due to a decline in recruitment of juveniles migrating from the Sargasso Sea. This has resulted in the closure of the Lake Ontario fishery in 2004 and its listing as endangered under …
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Behavioral freeze avoidance in an Antarctic fish
… notothenioid fishes inhabiting the ice-laden waters of the high-latitude Southern Ocean. Most notothenioids avoid freezing primarily by the action of their blood-borne antifreeze glycoproteins (AFGPs). AFGPs arrest the growth of environmental ice crystals that enter the fish, thereby preserving …
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Assessing species-specific reproductive variation to inform assisted reproductive technologies for Canadian snakes
… domestic livestock, are increasingly incorporated into conservation mating programs for species-at-risk. Species-specific insights on reproductive biology, including seasonal variation and endocrine function, improve ART outcomes. Despite representation in many zoological collections, snakes …
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Aquatic community response to Zequanox®: a mesocosm experiment
… mussels (Dreissena spp.) are European freshwater molluscs that have invaded most major inland water systems across North America, resulting in billions of dollars in damages and losses to fisheries, recreational water use, infrastructure, and industry each year. Zequanox®, a biopesticide made …
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Differential habitat selection of black bears, gray wolves, and boreal caribou in the Boreal Shield of Saskatchewan
… (Rangifer tarandus caribou) are listed as Threatened on Schedule 1 of the Canada Species at Risk Act, and critical habitat for this species is currently being defined across the country. Declines in populations have been driven largely by anthropogenic disturbance, and in this context much …
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IUCN red listing of marine macroalgal species : a South African case study
The IUCN Red List of Threatened Species is considered an important tool for conservation. However most evaluations have been restricted to terrestrial species and marine species are underrepresented. In contrast to terrestrial environments, the marine environment differs in dispersal restrictions …
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Habitat characterization of Saskatchewan's Dakota skipper, Hesperia dacotae population
… dacotae (Skinner, 1911) (Hesperiidae), is an at-risk butterfly species that inhabits the mesic mixed-grass prairie. The Dakota skipper is listed endangered under the federal Species at Risk Act. Loss of native prairie is the main factor driving declines in Dakota skipper habitat and species …
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The Effects of Global Change on Avian Biodiversity
<p>Avian biodiversity is under threat from many concurrent and interacting forms of change. My research uses various long-term monitoring datasets to understand and anticipate these changes. First, I quantified differences in reporting rates across eBird and the North American Breeding Bird Survey …
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Incorporating microclimate into habitat suitability analysis for plethodonitd salamanders
Climate has substantial influence on the distribution of species, and climate change puts many species at risk of extirpation or extinction due to diminishing range sizes. Understanding how organisms may respond to climate change is important for spatially predicting suitable habitat for …
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Behavioural Ecology in Conservation Planning: Individual and Sex-Specific Insights from Woodland Caribou (Rangifer tarandus caribou) in Western Canada
Conservation planning often relies on delineating intraspecific units to capture ecological and evolutionary diversity. To do this, traditional frameworks often emphasize genetic or taxonomic criteria as a first line of evidence for evolutionary significance. While useful, this approach assumes …
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Serviços ecossistêmicos de provisão prestados pela caatinga: uma análise do uso e cobertura da terra do município de Acari
Over the last few decades, natural landscapes have undergone significant transformations through the process of human use and occupation which, as a consequence, cause negative impacts on the components of the natural framework, with an emphasis on the ecological processes provided by ecosystems. …
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Population dynamics and population genetics of the Critically Endangered Raso lark: implications for conservation
… islet of Raso, Cape Verde. This thesis investigates two phenomena that particularly put the species at risk: its extreme fluctuations in population size, and its potentially very low genetic diversity arising from small population size and severe past population contraction. More specifically, …
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Forest and woodland regeneration dynamics and persistence in the human- modified landscape of Greater Gombe Ecosystem, Tanzania
… forests and woodlands for human use puts many species at risk of extinction. Vast areas of forests and woodlands have been converted to fragmented patches located within mosaics of different land uses (e.g., agricultural lands and human settlements). Some conservationists have argued that …
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Conservation of endemic species in China
… in the world, harboring more than 10% of the species in the world. Among them, 11% of the vertebrate genera and 7% plant genera are endemic to China. During its rapid social and economic development, increasing habitat loss and fragmentation have occurred. However, it wakes up to the threats …