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Full-Text Articles in Ecology and Evolutionary Biology
A Spatiotemporal Assessment Of Fish Assemblage Response To Land-Use Change And The Evaluation Of Edna Metabarcoding For Describing Diverse Fish Communities, Timothy M. Owen
Theses and Dissertations
Fish assemblages are often assessed as a biological proxy for environmental health. While humans value healthy environments for the ecosystem services and recreational opportunities they provide, it is increasingly evident that such resources can be paradoxically degraded by anthropogenic activities. In this investigation, we studied the relationship between different intensities of anthropogenic land-use change and habitat-driven fish assemblage response across multiple spatiotemporal scales. Secondarily, we explored the efficacy of eDNA metabarcoding against conventional electrofishing techniques for the purpose of describing complete fish communities. This study was conducted in the Tuckahoe Creek basin near Richmond, Virginia. This James River tributary serves …
Temperature Impacts On Embryonic And Larval Development Of Yellow Perch (Perca Flavescens), Anne Marie Linkenheld
Temperature Impacts On Embryonic And Larval Development Of Yellow Perch (Perca Flavescens), Anne Marie Linkenheld
Theses and Dissertations
Early life stages of fishes are critical stages due to their importance in enhancing recruitment. Given the high mortality through the embryonic and larval stages, managers have started investigating factors that impact these stages. Environmental factors, such as water temperature, have been found to play a larger role in early life survival. Climate change predications will be more apparent in northern temperate systems like the Great Lakes. Yellow perch (Perca flavescens) are an important sport fish in the region whose populations have been declining since the 1980s. The development of yellow perch as an aquaculture species has occurred in order …
The Benthic Feeding Ecology Of Round Goby Fry, Dylan Samuel Olson
The Benthic Feeding Ecology Of Round Goby Fry, Dylan Samuel Olson
Theses and Dissertations
Larval and juvenile stage events play a dominant role in regulating the ultimate recruitment strength of fish populations. As such, the feeding ecology of early life stages are useful for interpreting the proximate causes of recruitment variability. This study provides the first targeted study of the early juvenile (“fry”) diet of the round goby (Neogobius melanostomus, Pallas 1814), a prominent Great Lakes invasive fish. Previous accounts of the diets of round goby fry in the Great Lakes have been based upon by-catch from nocturnal, pelagic studies. Alternatively, we sampled diurnally (day) in diverse benthic environments including open lake, embayment, and …