Jay Gould

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Jay Gould Lake on August 6th, 2025, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, the most sensitive coldwater species present in this lake. During the summer, Cisco require a layer of oxythermal habitat that contains water temperatures below 21.2 degrees C (70.2 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on the profile from the deepest basin (maximum sampled depth 32.8 feet), the water temperature decreased below 21.2 degrees C (70.2 degrees F) at 17.3 feet and the dissolved oxygen concentration decreased to 3.0 mg/L at 16.7 feet at the time of sampling. Therefore, the water column did not contain a layer of water with sufficient temperature and dissolved oxygen for Cisco. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 21.8 degrees C (71.2 degrees F). TDO3 values warmer than 21.2 degrees C (70.2 degrees F) indicate that oxythermal conditions were unsuitable for Cisco at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the late summer period of maximum oxythermal stress (July 26th to Aug 24th) in 4 years, between 2007-2023, indicate suitable, yet marginal, oxythermal habitat in years surveyed, with the least favorable conditions recorded in 2022 when the suitable oxythermal habitat layer was 0.2 feet thick. When inadequate oxythermal habitat is available, Cisco are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Jay Gould Lake on August 6th, 2025, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, the most sensitive coldwater species present in this lake. During the summer, Cisco require a layer of oxythermal habitat that contains water temperatures below 21.2 degrees C (70.2 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on the profile from the deepest basin (maximum sampled depth 32.8 feet), the water temperature decreased below 21.2 degrees C (70.2 degrees F) at 17.3 feet and the dissolved oxygen concentration decreased to 3.0 mg/L at 16.7 feet at the time of sampling. Therefore, the water column did not contain a layer of water with sufficient temperature and dissolved oxygen for Cisco. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 21.8 degrees C (71.2 degrees F). TDO3 values warmer than 21.2 degrees C (70.2 degrees F) indicate that oxythermal conditions were unsuitable for Cisco at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the late summer period of maximum oxythermal stress (July 26th to Aug 24th) in 4 years, between 2007-2023, indicate suitable, yet marginal, oxythermal habitat in years surveyed, with the least favorable conditions recorded in 2022 when the suitable oxythermal habitat layer was 0.2 feet thick. When inadequate oxythermal habitat is available, Cisco are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

A temperature-dissolved oxygen profile was collected in the deepest basin on Jay Gould Lake on August 7, 2023, to evaluate the amount of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee. Based on the profile, the top of the thermocline (i.e., the location in the water column with the sharpest transition from warm to cold water) occurred at approximately 13 feet. Dissolved oxygen decreased to below 3.0 mg/L at 19 feet, which was within the thermocline, at the time of sampling. The temperature at which dissolved oxygen decreased to below 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 18.1°C (64.6°F). TDO3 values cooler than 21.5°C indicate that oxythermal conditions are favorable for Cisco. Dissolved oxygen concentrations within the thermocline indicate that suitable oxythermal habitat for Cisco was available across a range of depths at the time of sampling during the summer of 2023. Data collected in 1974-2015 indicate suitable oxythermal habitat in most years, with the least favorable conditions recorded in 1990. When inadequate oxythermal habitat is available, Cisco are squeezed into unfavorable, warmer water conditions and therefore experience higher levels of stress.

Based on Minnesota DNR survey data, anglers target Walleye, Black Crappie, Northern Pike, Yellow Perch, and Rock Bass in Jay Gould. See the full species list above for catch rates, size structure, and quality scores.

Minnesota DNR records list public access for Jay Gould. Check the DNR LakeFinder page for the launch type and directions before you go.

Jay Gould has a maximum depth of 33 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Jay Gould is from 2022.

Yes — Jay Gould has confirmed zebra mussel. Clean, drain, and dry your equipment to avoid spreading invasives to other waters.