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Articles 1 - 6 of 6
Full-Text Articles in Entire DC Network
Characterizing Predator-Prey Relationships Of Great Lakes Fishes Using Targeted Stomach Content Dna Analyses, Matthew Richard Charron
Characterizing Predator-Prey Relationships Of Great Lakes Fishes Using Targeted Stomach Content Dna Analyses, Matthew Richard Charron
Electronic Theses and Dissertations
Stomach content DNA (scDNA) analyses provide important insights into feeding ecology, trophic interactions, and diet composition of predator fishes. However, previous scDNA analyses have focused on investigating a small number of predator and prey fishes using binary presence/absence data. Here, I describe the development and validation of a panel of single-species quantitative real-time PCR (qRT-PCR) assays targeting the polymorphic mitochondrial cytochrome oxidase subunit 1 (CO1) region of 28 Great Lakes prey fishes. The assay panel will significantly increase the number of targeted prey species available for predator diet assessment, while at the same time improving detection sensitivity and through-put. I …
The Influence Of Spatiotemporal Variation In Food Web Models, Cecilia E. Heuvel
The Influence Of Spatiotemporal Variation In Food Web Models, Cecilia E. Heuvel
Electronic Theses and Dissertations
Aquatic ecosystems are constantly adapting to fluxes in season, temperature, nutrient cycling, and prey availability. Consequently, aquatic food webs are dynamic, and relationships between species are perpetually changing as organisms and primary producer communities adapt to current environmental conditions both in time and space. Despite this knowledge however, many food web studies continue to use temporally static and spatially homogenous representations of food webs. This thesis proposes that a detailed investigation of temporal and spatial trends in a large lake ecosystem can improve our understanding of the mechanisms and drivers of spatial and temporal variation in food web structure and …
Influence Of Lake Volume On Trophic Position, Carbon Use, And Resource Partitioning In Fish Across A Narrow Range Of Ecosystem Size, Alyssa Andersen
Influence Of Lake Volume On Trophic Position, Carbon Use, And Resource Partitioning In Fish Across A Narrow Range Of Ecosystem Size, Alyssa Andersen
Electronic Theses and Dissertations
Lake size is an important factor governing seasonal variation in limnological phenomena, origin of nutrient sources, species interactions, cross-habitat linkages, and trophic pathways, all having complex influences on food web structure and function. Lake size effects are most clearly demonstrated across very wide gradients in surface area or volume. This approach incorporates several complicating and collinear elements such as changing fish assemblages and species richness, and therefore, incorporates additional but unaccounted shifts in food web structure and function. A comparison across a finer lake size gradient where fish assemblages and species richness change little or not at all is needed …
Molecular Ecology Of The Sleeper Shark Subgenus Somniosus (Somniosus) Reveals Genetic Homogeneity Within Species And Lack Of Support For S. Antarcticus, Laura E. Timm, Cindy Tribuzio, Ryan P. Walter, Wesley A. Larson, Brent W. Murray, Nigel E. Hussey, Sharon Wildes
Molecular Ecology Of The Sleeper Shark Subgenus Somniosus (Somniosus) Reveals Genetic Homogeneity Within Species And Lack Of Support For S. Antarcticus, Laura E. Timm, Cindy Tribuzio, Ryan P. Walter, Wesley A. Larson, Brent W. Murray, Nigel E. Hussey, Sharon Wildes
Integrative Biology Publications
Inferences made from molecular data support regional stock assessment goals by providing insights into the genetic population dynamics of enigmatic species. Population genomics metrics, such as genetic diversity and population connectivity, serve as useful proxies for species health and stability. Sleeper sharks (genus Somniosus) are ecologically important deep-sea predators, estimated to reach ages of 250 to 300 yr and taking decades to reach sexual maturity. The subgenus Somniosus (Somniosus) is comprised of 3 species: S. pacificus, S. microcephalus, and S. antarcticus. Given the life history strategy of somniosids, they are vulnerable to overfishing and population declines. Further, data to assess …
A Systematic Review Of Snake Translocations To Identify Potential Tactics For Reducing Postrelease Effects, Jonathan D. Choquette, Jacqueline D. Litzgus, Joanne X.Y. Gui, Trevor E. Pitcher
A Systematic Review Of Snake Translocations To Identify Potential Tactics For Reducing Postrelease Effects, Jonathan D. Choquette, Jacqueline D. Litzgus, Joanne X.Y. Gui, Trevor E. Pitcher
Integrative Biology Publications
Advancements in the field of reintroduction biology are needed, but understanding of how to effectively conduct translocations, particularly with snakes, is lacking. We conducted a systematic review of snake translocation studies to identify potential tactics for reducing postrelease effects. We included studies on intentional, human-mediated, wild–wild, or captive–wild translocations to any location, regardless of motive or number of snakes translocated. Only studies that presented results for at least 1 of 4 outcomes (movement behavior, site fidelity, survival, or population establishment) were included. We systematically searched 4 databases for published studies and used 5 methods to search the gray literature. Our …
Single Hydrophone Underwater Localization Approach In Sallow Waters, Faraz Talebpour
Single Hydrophone Underwater Localization Approach In Sallow Waters, Faraz Talebpour
Electronic Theses and Dissertations
Applications of underwater signal processing are essential for environmental monitoring. Remote monitoring and passive sound source localization in an underwater environment can provide great insight into geological studies, environmental changes and marine lives monitoring. While various methods are available for Localization, they mostly employ arrays of hydrophones, requiring synchronization or prior knowledge of the source signals, which can prove costly, complicated, and hard to maintain. Remote monitoring applications require very high-range passive localization methods; and, given the frequency-selective nature of ambient noise and other channel parameters, current localization methods have short-distance range estimation or high localization error for long distances. …