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 19 of 19 for “"imperiled species"”.
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Overcoming evolutionary history: conditioning the endangered Barrens topminnow to avoid predation by the invasive Western mosquitofish
… for an organism but no longer are. Invasive species are one cause of evolutionary traps, and the Barrens Topminnow (BTM), Fundulus julisia serves as an example of an imperiled species trapped by the introduction of an invasive predator: the Western Mosquitofish (WMF), Gambusia affinis. This …
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Amphibian and reptile conservation in a changing environment: Case studies from the southeastern United States
… examine some of the challenges currently facing imperiled species of reptiles and amphibians in this region. The work is focused on two species, the Reticulated Flatwoods Salamander (Ambystoma bishopi) and the Eastern Indigo Snake (Drymarchon couperi) both of which are listed on the U.S. …
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Effects of Supraseasonal Drought on Karst Aquatic Communities of the Edwards Plateau
… fishes and riverine fishes, including several imperiled species, with spring-associated fishes persisting in the headwater reaches between 2022 and 2024. Although exceptional and supraseasonal droughts are typically linked to substantial changes in aquatic communities in more humid regions, …
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Are Mussel Shells Environmental DNA Time Capsules? A Comparison Of Extraction Methods For Obtaining DNA From Shell Material.
… mussels have become some of the most imperiled species in North America and widespread populations have succumbed to pollution and many other anthropogenic-related factors. With molecular techniques evolving, a recent interest in ancient DNA and museum specimens has emerged and …
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Cheetah of the Serengeti Plains: A home range analysis
… range, a useful trait for threat assessment, species reintroduction, and population estimation, is plastic in cheetah with sizes ranging from 40 km2 to over 1000 km2 depending on location. Previous home range estimates for cheetah used the minimum convex polygon (MCP), assuming asymptotic home …
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Ecology of Glacial Relict Fishes in South Dakota's Sandhills Region
… fragmentation and introductions of nonnative species have led to numerous extinctions, extirpations and altered distributions. Insufficient information regarding imperiled species often results in reactive, rather than proactive, management, and knowledge of species status and ecology is …
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Feeding Ecology of Invasive Catfishes in Chesapeake Bay Subestuaries
… feeding ecology and potential impact on native species was largely unknown. We collected stomach contents from 16,110 Blue Catfish at 698 sites in three large subestuaries of the Chesapeake Bay (James, York, Rappahannock rivers). Cumulative prey curves revealed that sample size was sufficient …
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Assessing the effects of prescribed fire on foraging bats at Mammoth Cave National Park after the arrival of White-nose Syndrome
… of White-nose Syndrome (WNS). Multiple bat species have experienced unprecedented population declines due to WNS, including federally listed Myotis sodalis (Indiana bat) and Myotis septentrionalis (northern long-eared bat). Specifically, the effect of WNS across forest landscapes is unclear …
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Population Size And Habitat Association Of Etheostoma Nebra, The Buck Darter, Using Abundance Modeling In The Buck Creek System, Cumberland River Drainage, Kentucky
… nebra (Buck Darter) is a recently described fish species confined to the Buck Creek system, Cumberland River drainage, Kentucky. A 2010-2012 survey of Buck Creek by Kentucky Department of Fish and Wildlife Resources personnel observed E. nebra at 2 of 47 historical sites. Within the entire system, …
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Using eDNA and Habitat Suitability Modeling to Better Understand the Range and Habitat Requirements of the Eastern Black Rail
… for listing under the federal Endangered Species Act. This species has experienced concerning population declines throughout its range. Black Rails are difficult to detect due to their small size, concealing habitat, and cryptic behavior. The most common survey method for rails uses audio …
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Understanding Wind Energy Impacts on Bats and Testing Reduction Strategies in South Texas
… (Tadarida brasiliensis) were the most impacted species. Based on my results, I recommend bat impact reduction strategies for this location and others in the region experiencing similar impacts. Los Vientos has a similar bat species composition and climate as other regions in the southwestern …
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Reproductive Biology of Syntopic Blackside Dace and Southern Redbelly Dace in Two Kentucky Streams
<p>When a rare endemic species and an ecologically similar, but more cosmopolitan species share habitat, understanding how they interact with each other is important for conservation efforts. This is especially true if both species rely on the same spawning habitat, which could potentially lead to …
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Bat Resource Utilization Along the Potomac River Corridor in Maryland
… period on the above-ground landscape, many species of animals consume cicadas and in turn have short-term habitat use and population responses. The response of bats to periodical cicadas is largely unknown. Using a before-after-control-impact study design, we deployed ultrasonic acoustic …
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Land development in Massachusetts: Its effect on the environment within Essex and Middlesex counties from 1990 to 2007
… concern, 670 acres in priority habitats of rare species, 1,092 acres in living waters core habitats and critical supporting watersheds, 1,318 acres in protected and recreational open spaces, and within 0-1000 feet of 600 certified vernal pools. In addition, several rare or imperiled species …
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COMMUNITY STRUCTURE AND FUNCTIONAL DIVERSITY OF IMPERILED GREAT PLAINS FISHES: IMPLICATIONS FOR CONSERVATION OF TWO ENDANGERED SHINERS (SHARPNOSE SHINER NOTROPIS OXYRHYNCHUS AND SMALLEYE SHINER NOTROPIS BUCCULA) IN THE UPPER BRAZOS RIVER, TEXAS
… America where pelagic broadcast spawning fish species are declining due to the loss of the natural flow regime and river fragmentation. Uncovering the abiotic and biotic drivers across spatial and temporal scales influencing fish assemblages across the Great Plains is required to inform …
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Defining rarity and determining the mechanisms of rarity for North American freshwater fishes
Conserving rare species and protecting biodiversity depends on sound information on the nature of rarity. Rarity is multidimensional, presenting the need for a quantitative classification scheme by which to label species as rare or common. I defined rarity for freshwater fishes based on the range …
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Piping plover habitat and demography following storm-induced and engineered landscape change
… and associated management actions on imperiled species can increase conservation value of future management. Piping plovers (Charadrius melodus) are federally threatened and endangered, disturbance-dependent shorebirds, nesting on broad, sparsely vegetated beaches, sandbars, and …
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Shorebirds in a changing landscape: Assessing the top-down and bottom-up drivers of American oystercatcher (<i>Haematopus palliatus</i>) reproductive success in the Virginia barrier islands
… is a vital component of the conservation of imperiled species. On the United States (U.S.) Atlantic and Gulf coasts, the American oystercatcher (Haematopus palliatus) is largely managed within a conservation framework that aims to identify and manipulate factors that limit reproductive …
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Assessment of Indiana bat reproductive condition, recapture trends, and temperatures of artificial roosts in Kentucky
<p>Recovery of bat species impacted by white-nose syndrome (WNS) will necessarily require population growth. I assessed reproductive capability of the endangered Indiana bat (Myotis sodalis) in Kentucky, where WNS was first detected in hibernacula in April 2011. Due to loss of fat reserves …