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Daniel L Yule, MSc

Daniel Yule is a Research Fisheries Biologist based in Ashland, WI.

Dan was born and raised in western Wisconsin and attended New Richmond Senior High School.  He obtained his BS degree from the University of Wisconsin – River Falls (1989) and his MS from Utah State University (1992).  After completing his studies he worked for 9 years as a Fish Biologist with the Reservoir Research Crew of the Wyoming Game and Fish Department.  From 2001-2003 he worked as a Fish Research Scientist with the Minnesota Department of Natural Resources. Since 2004, Dan has held his current position as a Fishery Research Scientist with the Great Lakes Science Center – Lake Superior Biological Station.  In his free time Dan enjoys hiking, camping, fishing, following WI sports teams, and watching movies.  Dan is a huge fan of historical fiction novels.

Professional Experience

  • 1991-2000:  Fish Biologist with the Reservoir Research Unit of the Wyoming Game and Fish Department. Dan oversaw the largest trout stocking evaluation conducted in Wyoming and developed acoustic methods for estimating trout abundance in reservoirs.

  • 2001-2003: Senior Fishery Research Biologist with the Minnesota Department of Natural Resources. Dan worked to develop acoustic methods for assessing abundance of zooplankton, forage fish, lake trout and rainbow trout populations in northern Minnesota lakes.

Education and Certifications

  • Certified Fisheries Professional by the American Fisheries Society, 2000-Present.

  • Master of Science - Utah State University, 1992.

  • Bachelor of Science - University of Wisconsin at River Falls, 1989.

Affiliations and Memberships*

  • American Fisheries Society

Honors and Awards

  • Recipient of the 2020 Moffett Award for tying for the best scientific contribution by the Great Lakes Science center that year (2022).

  • Exemplary Act Award awarded by the U.S. Department of Interior in recognition for a heroic act resulting in the saving of a life (2018).

  • Scientific and Technological Achievement Award Level III awarded by the U.S. Environmental Protection Agency for Identifying the Spatial Organization and Support of Large-Lake Food Webs (2015).

  • Bronze Medal of Commendable Service awarded by U.S. EPA to the 2011 Lake Superior Coordinated Science Monitoring Initiative - Integrated Assessment Team (2012).

  • Wyoming Game and Fish Department’s, Director’s Award recipient (1999) for exemplary performance (1999).

Abstracts and Presentations

  • Yule, D.L. W. Stott, T. Krabbenhoft, M. Bernal, S. Koenigbauer, and A. Ackiss. February 2021. Ongoing Lake Superior Coregonine Research: Answering Challenging Questions with New Tools to Support Future Management. Midwest Fish and Wildlife Conference, St. Paul, MN.

  • Yule, D.L., and M.R. Vinson. March 2023. A tale of three lake-wide CSMI benthic and pelagic fish surveys: 2011, 2016 & 2022. Great Lakes Fishery Commission, Upper Lakes Committee Meeting, Sault St. Marie, ON.

Science and Products

Filter Total Items: 34

A comparison of age- and size-structured assessment models applied to a stock of cisco in Thunder Bay, Ontario

Stock assessments are critical to modern fisheries management, supporting the calculation of key reference variables used to make informed management decisions. However, there is still considerable uncertainty as to which class of assessment models is appropriate to use under different circumstances. A common class of models used when age data are available are statistical catch-at-age...
Authors
Nicholas C Fisch, James R. Bence, Jared T. Myers, Eric K. Berglund, Daniel Yule
By
Ecosystems Mission Area, Great Lakes Science Center

Status and Trends in the Lake Superior Fish Community, 2017

In 2017, the Lake Superior fish community was sampled with daytime bottom trawls at 76 nearshore and 36 offshore stations. Spring nearshore and summer offshore water temperatures in 2017 were similar to slightly cooler than the 1991-2017 average. In the nearshore zone, a total of 28,902 individual fish from 27 species or morphotypes were collected. The number of species collected at each...
Authors
Mark Vinson, Lori M. Evrard, Owen T. Gorman, Daniel Yule
By
Ecosystems Mission Area, Great Lakes Science Center

Status and trends in the Lake Superior fish community, 2016

In 2016, the Lake Superior fish community was sampled with daytime bottom trawls at 76 nearshore and 35 offshore stations. Spring and summer water temperatures in 2016 were warmer than average and considerably warmer than observed in 2014 and 2015. In the nearshore zone, a total of 17,449 individuals from 20 species or morphotypes were collected. Nearshore lakewide mean biomass was 2.2...
Authors
Mark Vinson, Lori M. Evrard, Owen T. Gorman, Daniel Yule
By
Ecosystems Mission Area, Great Lakes Science Center

Ciscoes (Coregonus, subgenus Leucichthys) of the Laurentian Great Lakes and Lake Nipigon

This study of the ciscoes (Coregonus, subgenus Leucichthys) of the Great Lakes and Lake Nipigon represents a furtherance through 2015 of field research initiated by Walter Koelz in 1917 and continued by Stanford Smith in the mid-1900s—a period spanning nearly a century. Like Koelz’s study, this work contains information on taxonomy, geographical distribution, ecology, and status of...
Authors
Randy L. Eshenroder, Paul Vecsei, Owen T. Gorman, Daniel Yule, Thomas L. Pratt, Nicholas E. Mandrak, David B. Bunnell, Andrew M. Muir
By
Ecosystems Mission Area, Great Lakes Science Center

Seasonal and diel effects on acoustic fish biomass estimates: application to a shallow reservoir with untargeted common carp (Cyprinus carpio)

The aim of the present study was to understand how seasonal fish distributions affect acoustically derived fish biomass estimates in a shallow reservoir in a semi-arid country (Tunisia). To that end, sampling events were performed during four seasons (spring (June), summer (September), autumn (December) and winter (March)) that included day and night surveys. A Simrad EK60 echosounder...
Authors
Imed Djemali, Daniel Yule, Jean Guillard
By
Ecosystems Mission Area, Great Lakes Science Center

Evaluating the importance of abiotic and biotic drivers on Bythotrephes biomass in Lakes Superior and Michigan

The ability of planktivorous fishes to exert top-down control on Bythotrephes potentially has far-reaching impacts on aquatic food-webs, given previously described effects of Bythotrephes on zooplankton communities. We estimated consumption of Bythotrephes by planktivorous and benthivorous fishes, using bioenergetics and daily ration models at nearshore (18 m), intermediate (46 m), and...
Authors
Kevin M. Keeler, David Bunnell, James S. Diana, Jean Adams, Justin G. Mychek-Londer, David M. Warner, Daniel Yule, Mark Vinson
By
Ecosystems Mission Area, Great Lakes Science Center

Impact of fishing and stocking practices on Coregonid diversity

Fish species diversity can be lost through interacting stressors including habitat loss, stocking and overfishing. Although a multitude of stressors have played a role in the global decline of coregonid (Coregonus spp.) diversity, a number of contemporary studies have identified habitat loss stemming from eutrophication as the primary cause. Unfortunately, reconstructing the role of...
Authors
Orlane Anneville, Emilien Lasne, Jean Guillard, Reiner Eckmann, Jason D. Stockwell, Christian Gillet, Daniel Yule
By
Ecosystems Mission Area, Great Lakes Science Center

Status and trends in the Lake Superior fish community, 2014

In 2014, the Lake Superior fish community was sampled with daytime bottom trawls at 73 nearshore and 30 offshore stations. Spring and summer water temperatures were the coldest measured for the period of records for the surveys. In the nearshore zone, a total of 15,372 individuals from 28 species or morphotypes were collected. Nearshore lakewide mean biomass was 6.9 kg/ha, which was...
Authors
Mark Vinson, Lori M. Evrard, Owen T. Gorman, Daniel Yule
By
Ecosystems Mission Area, Great Lakes Science Center

Status and trends of prey fish populations in Lake Superior, 2008

The Great Lakes Science Center has conducted annual daytime bottom trawl surveys of the Lake Superior nearshore (15-80 m bathymetric depth zone) every spring since 1978 to provide a long-term index of relative abundance and biomass of the fish community. Between May 5 and June 14, 2008, 58 stations were sampled around the perimeter of the lake with 12-m wide bottom trawls. Trawls were...
Authors
Owen T. Gorman, Lori M. Evrard, Gary A. Cholwek, Jill M. Falck, Daniel Yule
By
Ecosystems Mission Area, Great Lakes Science Center

2008 Spawning Cisco Investigations in the Canadian Waters of Lake Superior

The Great Lakes Science Center of the United States Geological Survey (USGS) is working cooperatively with the Ontario Ministry of Natural Resources (OMNR) on a threeyear study to develop standard procedures for acoustic and midwater trawl (AC-MT) assessments of spawning cisco Coregonus artedi that the OMNR can carry forward as a management activity. In year two (2008), we conducted an...
Authors
Daniel Yule, Peter A. Addison, Lori M. Evrard, Ken I. Cullis, Gary A. Cholwek
By
Ecosystems Mission Area, Great Lakes Science Center

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*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government

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