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Current Research

The Effects of Dissolved Oxygen Concentrations of Crayfish Foraging Behavior

Humans have changed the demographics of the earth through increased CO2 which has lead to an overall increase in temperature of the earth. The increase in atmospheric temperature is expected to lead to an increase in aquatic temperature. Warmer water temperatures are predicted to pose a threat to aquatic poikilotherms. The solubility of water decreases with an increase temperature, which leads to a decrease in availability of dissolved gases. As a result of increased environmental temperatures, crayfish metabolism should increase. This increase in metabolism should increase the need for the consumption of food. The purpose of the experiment is to investigate whether reduced amounts of dissolved oxygen will alter the foraging behavior of crayfish. Crayfish are a keystone species, which means they control the demographics of their environment. The foraging behavior of two species of crayfish will be compared to determine if an increase in temperature will lead provide the invasive species Orconectes rusticus with an advantage over the native crayfish Orconectes virilis.

Associated Materials

Real-time Conditions on Douglas Lake

Data from the Douglas Lake Buoy is now available for download via the Marine Hydrodynamics Laboratory.

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The University of Michigan Biological Station is committed to helping our researchers successfully meet data management requirements such as those recently outlined by the National Science Foundation. Please visit our Data Management portal page for more!