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 23 for “"Population trend"”.
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Working with large-scale population trend data in ecology and conservation: methods and applications
… grammes, so many conservation decisions have population support at their core, and yet methods to accurately work with population data at scale are lacking. Armed with one the world’s largest population trend datasets, 749 species of waterbirds, at 45,475 sites across the world, I develop …
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Captive breeding programmes for nocturnal prosimians
… on these species is limited. Maintaining populations in zoos provides an opportunity to increase our knowledge of these elusive species. This study aimed to update and contribute to the limited research on captive populations of nocturnal prosimians. The study consists of two parts. Part …
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Comparative breeding biology of the Northern Rockhopper penguin Eudyptes moseleyi on Gough and Nightingale Islands
… past 37 years. Approximately 85% of the global population breeds at the Tristan da Cunha archipelago (Tristan, Inaccessible and Nightingale Islands) and nearby Gough Island in the central South Atlantic Ocean. The population on Gough Island declined by 50-60% between 1982 and 2005, but in the …
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The Breeding Ecology of Least Bitterns (Ixobrychus exilis) at Agassiz and Mingo National Wildlife Refuges
… to post hatching at both sites. Data supported a trend toward larger clutches at northern locations. Tarsus and wing development of hatchlings were similar between sites, while, overall mass and culmen development was a few days less at Mingo. Nest diameter and thickness did not differ between the …
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Resource selection, predation risk, and population dynamics of woodland caribou
… (Rangifer tarandus caribou) have experienced population declines and local extirpations across North America. Human disturbance has caused caribou declines indirectly through changes to apparent competition dynamics within the predator-prey community. Apparent competition occurs as a negative …
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Resource selection, predation risk, and population dynamics of woodland caribou
… (Rangifer tarandus caribou) have experienced population declines and local extirpations across North America. Human disturbance has caused caribou declines indirectly through changes to apparent competition dynamics within the predator-prey community. Apparent competition occurs as a negative …
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Assessing changes in connectivity and abundance through time for fisher in the southern Sierra Nevada
Small populations are at increased risk of extinction due to their vulnerability to stochastic events. The population of fisher (<italic>Pekania pennanti</italic>, formerly <italic>Martes pennanti</italic>) in the southern Sierra Nevada Mountains of California is small and completely genetically …
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The Termination of the Quickening Doctrine: American Law, Society, and the Advent of Professional Medicine in the Nineteenth Century
… women seeking abortions and disparities in the population trend. In the 1840s there was an upsurge of married women in the upper classes having abortions. Abortion was no longer for the shamed single women. That trend combined with the increasing number of births among the lower class and …
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Spatial population dynamics of recolonizing wolves in the Western Alps
… of this species relies on estimates of wolf population trend, survival rates, occupancy parameters, and on the development of a spatially explicit population model. These estimates were lacking in Italy and Western Europe, and accurate and cost effective methods to assess these parameters …
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Assessing changes in connectivity and abundance through time for fisher in the southern Sierra Nevada
Small populations are at increased risk of extinction due to their vulnerability to stochastic events. The population of fisher (<italic>Pekania pennanti</italic>, formerly <italic>Martes pennanti</italic>) in the southern Sierra Nevada Mountains of California is small and completely genetically …
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Spatial population dynamics of recolonizing wolves in the Western Alps
… of this species relies on estimates of wolf population trend, survival rates, occupancy parameters, and on the development of a spatially explicit population model. These estimates were lacking in Italy and Western Europe, and accurate and cost effective methods to assess these parameters …
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Fostering social innovation for active ageing : tackling later life loneliness
… as it is increasing alongside an upward global population trend which predicts that nearly 22% of the world population will be aged 60 years or over by 2050. This ‘silver tsunami’, an unparalleled growth of the older population, will exert socioeconomic pressure globally on healthcare, housing …
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Investigation into possible factors affecting the recruitment of Rocky Mountain elk on the Valles Caldera national preserve
… are responsible for ensuring a sustainable elk population. These studies were done to look at possible factors that may be contributing to the low recruitment of elk on the VCNP as well as simulate how the population may respond to different management actions. A serological survey was conducted …
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Tails through time: leopard population dynamics in the Little Karoo
… their global distribution and impacts their population numbers. Protected areas can offer refuge for large carnivores, however leopards (Panthera pardus), can persist outside of these areas and often occupy mixed-use landscapes. Our understanding of how leopards persist over time in mixed-use …
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Tails through time: leopard population dynamics in the Little Karoo
… their global distribution and impacts their population numbers. Protected areas can offer refuge for large carnivores, however leopards (Panthera pardus), can persist outside of these areas and often occupy mixed-use landscapes. Our understanding of how leopards persist over time in mixed-use …
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Simulation-Based Spatially Explicit Close-Kin Mark-Recapture for Genetic Monitoring of Wildlife Populations
Population size is one of the most important pieces of information for monitoring conservation efforts and setting sustainable harvest limits, but it is often difficult and labor intensive to estimate. Close kin mark-recapture (CKMR) is a promising new method for estimating population size from …
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From big spots to little spots: Influence of camera trap deployment on spatial capture-recapture estimates of servals (Leptailurus serval) in Ithala Game Reserve
… face a range of threats which can impact their populations, but we have little information on their conservation status across much of their range. Repeated population density estimates are the most useful parameter for assessing population trends and the impacts of anthropogenic changes (e.g. …
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Characterizing African Elephant (<i>Loxodonta Africana</i>) Population Dynamics and Distribution in Botswana
… is globally threatened. Of the total continental population, 37% is found in Botswana, the highest number and density of elephants in Africa. Elephant management in this country remains challenging and complex as the population estimates and trends calculated by government and independent …
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Birds on the move : Understanding elevational distributions and shifts of birds across European mountains
… how abiotic factors such as climatic trends, habitat characteristics, and species traits shape elevational distributions is crucial to predict biodiversity responses and inform conservation strategies under global change. This thesis investigates these factors across European mountains …
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Factors influencing the establishment of translocated eland (Taurotragus oryx) and springbok (Antidorcas marsupialis) in the Nyae Nyae conservancy, Namibia
… ungulates for the purpose of restocking wildlife populations in communal conservancies, and to determine the factors affecting the establishment of these ungulates, as well as the contribution of translocation to sustainable wildlife management in Namibia. The aim of this study was to establish …
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