Dissertations / Theses on the topic 'Environmental DNA (eDNA)'
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Bakker, Judith. "e(lasmo)DNA : the role of environmental DNA (eDNA) analysis in marine fish biodiversity assessment, with special focus on elasmobranchs." Thesis, University of Salford, 2018. http://usir.salford.ac.uk/46838/.
Full textWoodell, James D. "Field application of environmental DNA techniques to detect early stages of invasion by the destructive New Zealand mud snail." Thesis, University of Iowa, 2019. https://ir.uiowa.edu/etd/6889.
Full textRoderique, Bonnie A. "IMPROVING THE CONSERVATION OF A CRYPTIC ENDANGERED FRESHWATER MUSSEL (PARVASPINA COLLINA) THROUGH THE USE OF ENVIRONMENTAL DNA AND SPECIES DISTRIBUTION MODELING." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5552.
Full textUlibarri, Roy M. "Habitat Suitability Criteria for Zuni Bluehead Sucker Catostomus discobolus yarrowi and Navajo Nation Genetic Subunit Bluehead Sucker Catostomus discobolus and Comparing Efficiency of AFS Standard Snorkeling Techniques to eDNA Sampling Techniques." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/604876.
Full textEddings, James B. "The Utility of Environmental DNA and Species Distribution Models in Assessing the Habitat Requirements of Twelve Fish Species in Alaskan North Slope Rivers." DigitalCommons@USU, 2020. https://digitalcommons.usu.edu/etd/7708.
Full textPerez, Christina R., and Christina R. Perez. "Relationship between American Fisheries Society Standard Fish Sampling Techniques and Environmental DNA (eDNA) for Characterizing Fish Presence, Relative Abundance, Biomass, and Species Composition in Arizona Standing Waters." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/621368.
Full textSnyder, Matthew Robert. "Environmental DNA Detection and Population Genetic Patterns of Native and Invasive Great Lakes Fishes." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1564680483342507.
Full textHinkle, Jameson. "PROOF-OF-CONCEPT OF ENVIRONMENTAL DNA TOOLS FOR ATLANTIC STURGEON MANAGEMENT." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3932.
Full textSmith, Lia. "Biodiversity monitoring using environmental DNA: Can it detect all fish species in a waterbody and is it cost effective for routine monitoring?" Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2017. https://ro.ecu.edu.au/theses/1985.
Full textHarper, Kirsten Jennifer. "Trophic niche and detection of the invasive signal crayfish (Pacifastacus leniusculus) in Scotland." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/22355.
Full textHorton, Dean J. "Using molecular techniques to investigate soil invertebrate communities in temperate forests." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1448799316.
Full textChi-YuanTu and 凃棋元. "Movement of Environmental DNA (eDNA) in Static Water Environments." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/df5c2y.
Full text國立成功大學
水利及海洋工程學系
105
In this study, we try to understand the particle size distribution of eDNA and the movement of eDNA in static water environments for Channa micropeltes by using eDNA method. Our results showed that particle size of Channa micropeltes eDNA is most abundant from 1 to 10 μm. In sedimentation experiment, eDNA was detected in all water samples from six different water depths (0 to 1.5 m) after 2 hours from the time adding the water sample which contains eDNA into the surface water of the water column, so we infer that eDNA can be assumed as suspended particles. Besides, we detected higher eDNA concentration ratio in the deeper water samples when the fine sand (5 to 20 μm) was added into the water column. Therefore, we infer that eDNA can attach on the fine sand and settle down with the fine sand together. We also calculated the theoretical value of eDNA concentration when the sedimentation experiment was without adding sand. The results showed that the theoretical concentration is overestimated more obviously when the water depth is shallower. Therefore, we infer that there is a negative correlation between the degradation rate and the particle size of eDNA. We think the water depth is an important factor when using eDNA method to investigate biomass or degradation rate of eDNA. Besides, our results showed that eDNA can attach on the fine sand, so it is better to know the turbidity of water body before determining the water depth that we sample at in static water.
(5931176), Rikki Ratsch. "Efficacy of Using Environmental DNA (eDNA) to Detect Kirtland’s Snakes (Clonophis kirtlandii)." Thesis, 2019.
Find full textEnvironmental DNA (eDNA) surveys utilize DNA shed from animals in order to detect their presence. Since it was developed, this technique has been applied to numerous species across several taxa. In some cases, it has been shown to be superior to traditional survey methods at detecting rare or cryptic species. It allows for the detection of animals in low numbers and does not require direct capture of an animal. This allows eDNA to be more effective at detecting rare or cryptic species that require high survey effort to find. This often reduces survey costs as many eDNA samples can be collected quickly with little equipment required.
The Kirtland’s Snake (Clonophis kirtlandii) is a small Natricine snake endemic to the Midwest. It is a species of conservation concern since it is threatened throughout its range. Due to its cryptic and fossorial lifestyle, it is also a notoriously difficult snake to survey. This has resulted in a poor understanding of Kirtland’s Snake life history and population status. Applying eDNA surveys to this species may increase detection probability, offering a more efficient way to survey for them.
In this study, a quantitative PCR (qPCR) assay was designed and tested alongside traditional coverboard surveys. The assay had a limit of detection of 166 copies of Kirtland’s Snake DNA. In crayfish burrow sediment, eDNA was found to be detectable up to 10 days and may persist for up to 25 days. However, only one detection occurred out of 380 field samples. Coverboard surveys revealed temporal and spatial variation in Kirtland’s Snake abundance. More snakes were captured in the spring, during the first field season, and at the south coverboard transects. Kirtland’s Snake abundance was also found to be related to the presence of grass and herbaceous vegetation as well as close proximity to shrubs. Comparing survey methods, coverboards resulted in far better snake detection, suggesting that eDNA does not offer an advantage over traditional survey methods for this species.
Sneiderman, Robert. "Data analysis of salmonid environmental DNA measurements obtained via controlled experiments and from several Pacific streams." Thesis, 2020. http://hdl.handle.net/1828/12554.
Full textGraduate
2021-11-20
Peinemann, Viktor N. Nunes. "Detecting the Unseen: Using Environmental DNA to Complement Visual Fish Surveys in the Southern Red Sea." Thesis, 2021. http://hdl.handle.net/10754/669014.
Full textFischer, Payton Nicole. "Modeling Suitable Habitat for the Common Mudpuppy (Necturus maculosus maculosus) Utilizing Regional Data and Environmental DNA." Thesis, 2020. http://hdl.handle.net/1805/22884.
Full textThe distribution of the Common Mudpuppy (Necturus maculosus maculosus) is widespread but greatly understood. It is assumed that mudpuppy populations are declining due to poor habitat quality. However, there is not enough data to support this claim. The distribution of the mudpuppy is throughout the entire state, but only 43 of the 92 counties in Indiana have records. This project utilized habitat suitability modeling, focused on Indiana, to gain a better understanding of their distribution within the state. Data from Ohio and the Salamander Mussel (Simpsonais ambigua) were included to bolster the dataset. Environmental DNA was included to validate the model. Variables used in this analysis were Strahler Stream Order, distance to forest, percent agriculture, and tree canopy cover. Results showed that stream orders 4 to 6, a shorter distance to forest, less agriculture, and 30 to 40% of tree canopy cover was what contributed to suitable habitat. Stream order was the variable that contributed to the model the most. The areas of suitable habitat found were the HUC08 sub-watersheds in the northeastern and southwestern corners of the state. These areas included 19 counties were there were no previous records of mudpuppies. Environmental DNA showed that the negative samples were not found in suitable habitat. Further supporting the predicted area of suitable habitat. It is recommended that conservation efforts focus on the northeastern and southwestern regions. Interpreting this data to align with the regions set by the Indiana State Wildlife Action Plan shows that conservation should focus in the Great Lakes, Interior Plateau, and Valley and Hills area. It is recommended that more environmental data be conducted and that proactive conservation measures are implemented.
(5931173), Jessica Merkling. "Development of an Environmental DNA Assay for Eastern Massasauga." Thesis, 2019.
Find full textJane, Stephen F. "An Assessment of Environmental Dna as a Tool to Detect Fish Species in Headwater Streams." 2014. https://scholarworks.umass.edu/theses/1186.
Full textHebda, Christopher Franklin George. "Late Pleistocene palaeoenvironments, archaeology, and indicators of a glacial refugium on northern Vancouver Island, Canada." Thesis, 2019. http://hdl.handle.net/1828/11432.
Full textGraduate
2020-12-11