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The crew of the DNR's Survey Vessel Steelhead set a trawl net in Lake Michigan. The crew conducts an annual hydroacoustic (sonar) and mid-water trawl survey of alewives and other prey fishes (like the mottled sculpin) in Lake Michigan to get a snapshot of current conditions. Once the survey work is completed, estimates of total prey fish abundance are generated by managers and are used to balance predator-prey dynamics. Fisheries managers then adjust salmon stocking rates to keep alewife abundance in check with lake productivity levels.

A crewmember of the DNR's Survey Vessel Steelhead lowers a digital sensor into Lake Michigan. The crew conducts an annual hydroacoustic (sonar) and mid-water trawl survey of alewives and other prey fishes (like the mottled sculpin) in Lake Michigan to get a snapshot of current conditions. Once the survey work is completed, estimates of total prey fish abundance are generated by managers and are used to balance predator-prey dynamics. Fisheries managers then adjust salmon stocking rates to keep alewife abundance in check with lake productivity levels.

This map shows the mines and mineral resources in part of the Upper Peninsula of Michigan as known in 1846.

This map shows the mines and mineral resources in part of the Upper Peninsula of Michigan as known in 1846.

This map shows the mines and mineral resources in part of the Upper Peninsula of Michigan as known in 1846.

This collection consists of the original surveyors' field notebooks produced by the U.S. Land Office and collected by the Michigan Department of Natural Resources, Real Estate Division. Contains the original handwritten survey notes that divided the remaining public domain of the state into individual township parcels, each averaging approximately 36 square miles. There were over 1,400 townships surveyed within the state, using over 2,000 field notebooks.

This collection contains wildlife reports from the Michigan Department of Natural Resources dated 1937-2017. The reports include surveys on various wildlife focusing on management, activity, and distribution throughout the state of Michigan.

This collection contains wildlife reports from the Michigan Department of Natural Resources dated 2015-2018. Reports include surveys of various wildlife including bears, deer, fall and spring turkey, and pheasant.

This collection contains wildlife reports from the Michigan Department of Natural Resources dated 2016-2019. Reports include survey of various wildlife including bears, deer, elk, otter and beaver. A 2006 American Woodcock Symposium is also included.

This volume contains transcripts of the original GLO survey notes for Township 1-10N, Ranges 14-15W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 21-30N, Ranges 5-6E. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 11-20N, Range 7-9E. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 11-20N, Ranges 18-19W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 41-48N, Ranges 1-3E. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 49-50N, Ranges 30-35W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 1-10N, Ranges 3-4E. Each volume contains a set of index maps that indicate page numbers for each section in a township.

This volume contains transcripts of the original GLO survey notes for Township 37-39N, Ranges 18-24W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 21-28N, Range 6W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 21-29N, Ranges 15-17W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 21-30N, Range 1W. Each volume contains a set of index maps that indicate page numbers for each section in a township.  

This volume contains transcripts of the original GLO survey notes for Township 1-10N, Ranges 2-3E. Each volume contains a set of index maps that indicate page numbers for each section in a township.