Sofia A Silvis
Sofia A Silvis is a Librarian (Data Scientist) based in Ann Arbor, MI.
Science and Products
Data releases by this scientist
Lake Michigan Gillnet Lake Trout Assessment 1998-2003
Annual spring (May) and fall (late October through early November) gillnet assessment surveys were conducted by researchers at the USGS Great Lakes Science Center (GLSC) in northern Lake Michigan, including the Northern Refuge, between 1998-2023. Total length, weight, sex, maturity, and sea lamprey wounds were recorded for each lake trout and burbot caught in the gill nets. Lake trout...
Great Lakes Research Vessel Operations 1958-2018. (ver. 3.0, April 2019)
The Great Lakes Research Vessel Operations data release is taken from the Research Vessel Catch (RVCAT) database curated at the Great Lakes Science Center (GLSC). RVCAT has been used as the primary data collection tool aboard the GLSCs research vessel operations. The data set has been collected on various vessel operations on all the Great Lakes and select connecting waterways between...
Bathythermograph Data, Lake Michigan, 1954
In 1954 researchers at the USGS Great Lakes Science Center conducted 11 research cruises on Lake Michigan during which 779 bathythermographs were cast to collect temperature profile data (temperature at depth). Bathythermographs of that era recorded water pressure and temperature data by mechanically etching them as a curve on a glass slide. Data was collected from the glass slide by...
Science and Products
Data releases by this scientist
Lake Michigan Gillnet Lake Trout Assessment 1998-2003
Annual spring (May) and fall (late October through early November) gillnet assessment surveys were conducted by researchers at the USGS Great Lakes Science Center (GLSC) in northern Lake Michigan, including the Northern Refuge, between 1998-2023. Total length, weight, sex, maturity, and sea lamprey wounds were recorded for each lake trout and burbot caught in the gill nets. Lake trout...
Great Lakes Research Vessel Operations 1958-2018. (ver. 3.0, April 2019)
The Great Lakes Research Vessel Operations data release is taken from the Research Vessel Catch (RVCAT) database curated at the Great Lakes Science Center (GLSC). RVCAT has been used as the primary data collection tool aboard the GLSCs research vessel operations. The data set has been collected on various vessel operations on all the Great Lakes and select connecting waterways between...
Bathythermograph Data, Lake Michigan, 1954
In 1954 researchers at the USGS Great Lakes Science Center conducted 11 research cruises on Lake Michigan during which 779 bathythermographs were cast to collect temperature profile data (temperature at depth). Bathythermographs of that era recorded water pressure and temperature data by mechanically etching them as a curve on a glass slide. Data was collected from the glass slide by...