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Neurobehavioral And Gene Expression Effects Of Early Embryonic Methylmercury Exposure In Yellow Perch (Perca Flavescens) And Zebrafish (Danio Rerio) Larvae, Francisco Xavier Mora Zamorano
Neurobehavioral And Gene Expression Effects Of Early Embryonic Methylmercury Exposure In Yellow Perch (Perca Flavescens) And Zebrafish (Danio Rerio) Larvae, Francisco Xavier Mora Zamorano
Theses and Dissertations
Methylmercury (MeHg) is a pervasive and persistent neurotoxic environmental pollutant known to affect the behavior of fish, birds and mammals. The present study addresses the neurobehavioral and gene expression effects of MeHg in yellow perch (Perca flavescens) and zebrafish (Danio rerio) embryos. The rationale for this study originated from an interest to understand the behavioral and molecular phenotypes of environmental MeHg exposure in the yellow perch, an ecologically and economically relevant species of the North American Great Lakes region. Both MeHg and the yellow perch coexist in a common ecosystem: the North American Great Lakes. However, the effects of this …
Round Goby-Induced Changes In Young-Of-Year Yellow Perch Diet And Habitat Selection, Christopher John Houghton
Round Goby-Induced Changes In Young-Of-Year Yellow Perch Diet And Habitat Selection, Christopher John Houghton
Theses and Dissertations
A critical step in the recruitment of age-0 yellow perch (Perca flavescens) to the
adult population occurs during their transition to the demersal stage. If larval age-0
yellow perch survive recruitment bottlenecks imposed by alewife (Alosa
pseudoharengus) and dreissenid mussels, they transition to demersal feeding in late
August and early September. In Lake Michigan, demersal age-0 yellow perch seek
rock substrate where they begin feeding on benthic invertebrates in late summer.
That research preceded the invasion of the round goby (Neogobius melanostomus), a
species that can have negative impacts on benthic forage. The current study used
the spread of round …
Effects Of The Algal Toxin Microcystin On Fishes In The James River, Virginia, Maxwell D. Haase
Effects Of The Algal Toxin Microcystin On Fishes In The James River, Virginia, Maxwell D. Haase
Theses and Dissertations
With the global rise in frequency of harmful algal blooms in estuarine environments comes an increase in prevalence of toxic metabolites, such as microcystin (MC), that some of the cyanobacteria involved will produce. At high concentrations, MC may accumulate in consumer tissues and have deleterious effects on organisms; however impacts of the toxin on aquatic living resources at ecologically relevant concentrations have not been widely documented. We analyzed the effects of MC on juveniles of five fish species from the James River, Virginia to determine if MC has the potential to impede growth. Using three separate experimental approaches, it was …