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 26 for “"apparent survival"”.
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Nesting Ecology Of Red-Headed Woodpeckers (Melanerpes Erythrocephalus) In Central Minnesota
… with logistic exposure modeling. Daily nest survival rate was higher for nests initiated earlier in the season and for nests in cavities in dead branches, as supported by lowest Akaike information criterion (AIC) scores among candidate models. Of nests found during the egg laying stage, 100% …
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Population Demographics And Active Foraging Behavior Of Copperheads (Agkistrodon Contortrix) At A Recreational Site In Eastern Kentucky
… models that quantify the probability of apparent survival (S) and recapture (p) as it related to snake sex and weight. In addition, copperhead foraging behavior was closely observed in order to 1) quantify individual behaviors, 2) calculate movement rates, and 3) describe the copperhead’s …
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Determinants of variation in productivity, adult survival and recruitment in a declining migrant bird : the Whinchat (Saxicola rubetra)
… have a common source, such as low over-winter survival, which affects the whole UK population. To better understand the declines, this study investigated the key demographic parameters driving the breeding Whinchat population change on Salisbury Plain, UK, which is an area of agriculturally …
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Influences of Historical and Contemporary Environmental Conditions on Threatened and Endemic Aquatic Organisms
… decreases in estimated abundances and apparent survival at one site, but not the other. The differential effects observed in estimated abundance and apparent survival among species were attributed to flood magnitude differences, substrate differences, and life-history traits of each …
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Small water, big potential: farm ponds and their potential for native fish conservation
… of a native minnow species, and (3) quantify the survival, movement, and reproduction of Topeka Shiner in select ponds and a stream on TAPR. I sampled 100 farm ponds across central Kansas in 2021 and more than half of sampled farm ponds contained stream fish to assess farm pond fish communities. …
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Spatial population dynamics of western painted turtles in a wetland ecosystem in northwestern Montana
… wildlife conservation. Although data on turtle survival and movement rates are available, few studies use rigorous statistical analyses and none include examination of stage-specific seasonal survival simultaneous with movement estimates. I used capture-mark-recapture methods to estimate …
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Spatial population dynamics of western painted turtles in a wetland ecosystem in northwestern Montana
… wildlife conservation. Although data on turtle survival and movement rates are available, few studies use rigorous statistical analyses and none include examination of stage-specific seasonal survival simultaneous with movement estimates. I used capture-mark-recapture methods to estimate …
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Nestling Diet, Quality, and Post-fledging Survival: Comparing Two Species of Aerial Insectivores in a Gradient of Agricultural Intensity in Saskatchewan, Canada
… technology, I tracked early post-fledging apparent survival and movements of Barn and Tree Swallows. Estimates of post-fledging survival were similar between species, declining from 88.1% and 95.5% from tagging to fledging in Barn and Tree Swallows, to an apparent daily survival of 64.1% …
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A curate's egg: feeding birds during reproduction is 'good in parts'. A study of blue tits Cyanistes caeruleus and great tits Parus major
… mealworms during the nestling phase increased apparent survival of fledglings. Intriguingly, however, stable isotope analysis revealed that supplement use was insubstantial and similar between birds on supplemented and non-supplemented territories. Analyses of data from the British Trust for …
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Ornate box turtle (Terrapene ornata) demography in northern Illinois
… 4.20 at Nachusa Grasslands. To estimate annual survival, I conducted capture-mark-recapture surveys. Annual apparent survival was 0.970 at Ayers Sand Prairie and 0.860 at Nachusa Grasslands. Matrix population models showed the Ayers Sand Prairie population as stable, whereas the Nachusa …
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Nesting and Brood-Rearing Habitat Selection of Greater Sage-Grouse and Associated Survival of Hens and Broods at the Edge of Their Historic Distribution
… objectives of this study were to estimate nest survival, hen and brood survival, and associated nest and brood-site habitat selection of sage-grouse in southwestern North Dakota. The study was conducted during the spring and summer of 2005 and 2006 in Bowman County, North Dakota. Nest-sites were …
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Population Dynamics of Ouachita Dusky Salamanders (Desmognathus brimleyorum) in a Managed Forest Landscape
… mechanisms of salamander abundance shifts, survival and movement. We conducted a capture-mark-recapture (CMR) study at three streams within intensely managed pine forests in west-central Arkansas from May 2014-October 2016. The pine stands surrounding two of the streams were harvested …
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Using mark-recapture methods to estimate population size and survival of pyjama sharks (Poroderma africanum) in Mossel Bay, South Africa
… acoustic telemetry data to estimate abundance, apparent survival, recapture probability and temporary emigration for the pyjama shark, Poroderma africanum in Mossel Bay, South Africa over a five-year period. This study applied Pollock's robust design (with the conventional tag data) and …
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Population Viability Analysis of Swift fox (Vulpes velox) at the Badlands National Park
… were: (1) To determine the age-specific survival of the reintroduced swift fox population at BNP and surrounding area, (2) to determine the genetic diversity of the reintroduced population at BNP and (3) to determine habitat selection of female swift fox during the pup-rearing period (May …
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Using Noninvasive Genetic Sampling to Assess and Monitor Grizzly Bear Population Status in the Northern Continental Divide Ecosystem
… year are less expensive but only yield trend and apparent survival estimates. I provide recommendations for designing a program to monitor population trends by sampling at bear rubs. Systematic bear rub surveys may provide a viable alternative to telemetry–based methods for monitoring trends in …
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Using Noninvasive Genetic Sampling to Assess and Monitor Grizzly Bear Population Status in the Northern Continental Divide Ecosystem
… year are less expensive but only yield trend and apparent survival estimates. I provide recommendations for designing a program to monitor population trends by sampling at bear rubs. Systematic bear rub surveys may provide a viable alternative to telemetry–based methods for monitoring trends in …
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Using survival analysis to investigate breast cancer in the Kurdistan region of Iraq
The objective of this thesis is to carry out a survival analysis for patients with breast cancer. Using data from the Nanakaly and Hewa hospitals in the cities of Erbil and Suleimaniah, respectively, cases where there is hidden censoring on survival time were investigated. The aim of this study was …
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Defending Wild Dogs: Population Dynamics and Disease in Endangered African Wild Dogs
… interspecific competition, and disease. Survival rates are especially low in Kruger National Park (KNP), though it is unclear why. I estimated the abundance in KNP and survival rates over different time spans, six years and nine months, using public photographic survey data. In 2015, …
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Effects of Land Use on Hellbenders (Cryptobranchus alleganiensis) at Multiple Levels and Efficacy of Artificial Shelters as a Monitoring Tool
… to local populations (rather than increased apparent survival of adults). Populations in lesser forested areas were declining and composed largely of relatively old adults, indicating that land use can lead to changes in hellbender distribution given sufficient time. In Chapter III, I …
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Spatial ecology and demography of eastern coyotes (Canis latrans) in western Virginia
… a spatial capture-recapture model. Six-month apparent survival was lower in Bath County (Φ<sub>Bath</sub> = 0.442, 0.259 – 0.643; Φ<sub>Rockingham</sub> = 0.863, 0.269 – 0.991). The Bath County population demonstrated persistence despite high mortality and the Rockingham population …
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