Quantifying Responses to Hybrid Striped Bass Predation across Multiple Trophic Levels: Implications for Reservoir Biomanipulation

Physiological responses of hybrid striped bass under sedation by several anesthetics

Several aquatic anesthetics, in doses low enough not to change the swimming behavior, alone and in combination with NaCl, were evaluated for their effectiveness to suppress the stress response in sunshine bass (Morone chrysops Morone saxatilis). Clove oil, Aqui-SR, metomidate, MS-222, quinaldine, and quinaldine sulfate were used alone or combined with 5 g/l NaCl. The stress response was evaluat...

Impacts of Psychotropic Pharmaceuticals on Hybrid Striped Bass: Altered Predation Behavior as a Function of Changes in Brain Chemistry

Seasonal Natural and Fishing Mortality of Striped Bass in a Southeastern Reservoir

—Reliable estimates of natural and fishing mortality are important for management of exploited fish populations, but these components of the total mortality rate can be difficult to determine by traditional fisheries methods. We used telemetry data to determine seasonal instantaneous fishing (F) and natural mortality (M) rates of subadult and adult striped bass Morone saxatilis in Badin Lake, N...

Predation on Multiple Trophic Levels Shapes the Evolution of Pathogen Virulence

The pathogen virulence is traditionally thought to co-evolve as a result of reciprocal selection with its host organism. In natural communities, pathogens and hosts are typically embedded within a web of interactions with other species, which could affect indirectly the pathogen virulence and host immunity through trade-offs. Here we show that selection by predation can affect both pathogen vir...

Sequential sympatric speciation across trophic levels.

A major cause for biodiversity may be biodiversity itself. As new species form, they may create new niches for others to exploit, potentially catalyzing a chain reaction of speciation events across trophic levels. We tested for such sequential radiation in the Rhagoletis pomonella (Diptera: Tephritidae) complex, a model for sympatric speciation via host plant shifting. We report that the parasi...