Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron

Examination of angler‐caught piscivore stomachs revealed that Lake Trout Salvelinus namaycush, Chinook Salmon Oncorhynchus tshawytscha, and Walleyes Sander vitreus altered their diets in response to unprecedented declines in Lake Huron’s main‐basin prey fish community. Diets varied by predator speci...

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Published in:Transactions of the American Fisheries Society
Main Authors: Roseman, Edward F., Schaeffer, Jeffrey S., Bright, Ethan, Fielder, David G.
Format: Article in Journal/Newspaper
Language:unknown
Published: Taylor & Francis 2014
Subjects:
Natural Resources and Environment
Science
Atlantic salmon
Salmo salar
Online Access:https://hdl.handle.net/2027.42/141251
https://doi.org/10.1080/00028487.2014.945659
id ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/141251
record_format openpolar
institution Open Polar
collection University of Michigan: Deep Blue
op_collection_id ftumdeepblue
language unknown
topic Natural Resources and Environment
Science
spellingShingle Natural Resources and Environment
Science
Roseman, Edward F.
Schaeffer, Jeffrey S.
Bright, Ethan
Fielder, David G.
Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron
topic_facet Natural Resources and Environment
Science
description Examination of angler‐caught piscivore stomachs revealed that Lake Trout Salvelinus namaycush, Chinook Salmon Oncorhynchus tshawytscha, and Walleyes Sander vitreus altered their diets in response to unprecedented declines in Lake Huron’s main‐basin prey fish community. Diets varied by predator species, season, and location but were nearly always dominated numerically by some combination of Alewife Alosa pseudoharengus, Rainbow Smelt Osmerus mordax, Emerald Shiner Notropis atherinoides, Round Goby Neogobius melanostomus, or terrestrial insects. Rainbow Trout Oncorhynchus mykiss (steelhead), Coho Salmon Oncorhynchus kisutch, and Atlantic Salmon Salmo salar had varied diets that reflected higher contributions of insects. Compared with an earlier (1983–1986) examination of angler‐caught predator fishes from Lake Huron, the contemporary results showed an increase in consumption of nontraditional prey (including conspecifics), use of smaller prey, and an increase in insects in the diet, suggesting that piscivores were faced with chronic prey limitation during this study. The management of all piscivores in Lake Huron will likely require consideration of the pervasive effects of changes in food webs, especially if prey fish remain at low levels.Received December 19, 2013; accepted June 30, 2014 Peer Reviewed https://deepblue.lib.umich.edu/bitstream/2027.42/141251/1/tafs1419.pdf
format Article in Journal/Newspaper
author Roseman, Edward F.
Schaeffer, Jeffrey S.
Bright, Ethan
Fielder, David G.
author_facet Roseman, Edward F.
Schaeffer, Jeffrey S.
Bright, Ethan
Fielder, David G.
author_sort Roseman, Edward F.
title Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron
title_short Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron
title_full Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron
title_fullStr Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron
title_full_unstemmed Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron
title_sort angler‐caught piscivore diets reflect fish community changes in lake huron
publisher Taylor & Francis
publishDate 2014
url https://hdl.handle.net/2027.42/141251
https://doi.org/10.1080/00028487.2014.945659
genre Atlantic salmon
Salmo salar
genre_facet Atlantic salmon
Salmo salar
op_relation Roseman, Edward F.; Schaeffer, Jeffrey S.; Bright, Ethan; Fielder, David G. (2014). "Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron." Transactions of the American Fisheries Society 143(6): 1419-1433.
0002-8487
1548-8659
https://hdl.handle.net/2027.42/141251
doi:10.1080/00028487.2014.945659
Transactions of the American Fisheries Society
S. C., Riley, E. F. Roseman, S. J. Nichols, T. P. O’Brien, C. S. Kiley, and J. S. Schaeffer. 2008. Deepwater demersal fish community collapse in Lake Huron. Transactions of the American Fisheries Society 137: 1879 – 1890.
D. J., Jude, R. H. Reider, and G. R. Smith. 1992. Establishment of Gobiidae in the Great Lakes basin. Canadian Journal of Fisheries and Aquatic Sciences 49: 416 – 421.
SAS Institute. 2011. Base SAS 9.3 procedures guide: statistical procedures. SAS Institute, Cary, North Carolina.
J., Savitz 2009. Diets of Lake Michigan salmon and maximum size of Alewife prey. Journal of Freshwater Ecology 24: 563 – 566.
S. B., Brandt 1986. Food of trout and salmon in Lake Ontario. Journal of Great Lakes Research 12: 200 – 205.
S. C., Riley, E. F. Roseman, M. A. Chriscinske, T. R. Tucker, J. Ross, P. Armenio, N. Watson, and W. Woelmer. 2014. Status and trends of the Lake Huron offshore demersal fish community, 1976–2013. U.S. Geological Survey, Annual Report to the Great Lakes Fishery Commission, Ann Arbor, Michigan.
E. H., Brown 1972. Population biology of Alewives, Alosa pseudoharengus, in Lake Michigan, 1949–70. Journal of the Fisheries Research Board of Canada 29: 477 – 500.
E. F., Roseman, and S. C. Riley. 2009. Biomass of deepwater demersal forage fishes in Lake Huron, 1994–2007: implications for offshore predators. Aquatic Ecosystem Health Management 12: 29 – 36.
E. F., Roseman, J. S. Schaeffer, and P. Steen. 2009. Review of fish diversity in the Lake Huron basin. Aquatic Ecosystem Health Management 12: 11 – 22.
S. A., Rush, G. Paterson, T. B. Johnson, K. G. Drouillard, G. D. Haffner, C. E. Hebert, M. T. Arts, J. D. McGoldrick, S. M. Backus, B. F. Lantry, J. R. Lantry, T. Schaner, and A. T. Fisk. 2012. Long‐term impacts of invasive species on a native top predator in a large lake system. Freshwater Biology 57: 2342 – 2355.
R. W., Rybicki, and D. F. Clapp. 1996. Diet of Chinook Salmon in eastern Lake Michigan, 1991–93. Michigan Department of Natural Resources, Fisheries Division Research Report 2027, Lansing.
J. S., Schaeffer 1994. Mechanisms regulating growth and food consumption of Walleyes and Yellow Perch in Saginaw Bay, Lake Huron. Doctoral dissertation. University of Michigan, Ann Arbor.
J. S., Schaeffer, A. Bowen, M. Thomas, J. R. P. French III, and G. L. Curtis. 2005. Invasion history, proliferation, and offshore diet of Round Goby Neogobius melanostomus in western Lake Huron, USA. Journal of Great Lakes Research 31: 414 – 425.
J. C., Schneider, editor. 2000. Manual of fisheries survey methods II with periodic updates. Michigan Department of Natural Resources, Fisheries Special Report 25, Lansing.
S. H., Smith 1970. Species interactions of Alewife in the Great Lakes. Transactions of the American Fisheries Society 99: 754 – 765.
G. R., Spangler, and J. J. Collins. 1992. Lake Huron fish community structure based on gill‐net catches corrected for selectivity and encounter probability. North American Journal of Fisheries Management 12: 585 – 597.
D. J., Stewart, J. F. Kitchell, and L. B. Crowder. 1981. Forage fishes and their salmonid predators in Lake Michigan. Transactions of the American Fisheries Society 110: 751 – 763.
H. A., Tanner, and W. H. Tody. 2002. History of the Great Lakes salmon fishery: a Michigan perspective. Pages 139 – 154 in K. D. Lynch, M. L. Jones, and W. W. Taylor, editors. Sustaining North American salmon: perspectives across regions and disciplines. American Fisheries Society, Bethesda, Maryland.
D., Traynor, A. Moerke, and R. Greil. 2010. Identification of Michigan fishes using cleithra. Great Lakes Fishery Commission, Special Publication 2010‐2, Ann Arbor, Michigan.
D. M., Warner, C. S. Kiley, R. M. Claramunt, and D. F. Clapp. 2008. The influence of Alewife year‐class strength on prey selection and abundance of age‐1 Chinook Salmon in Lake Michigan. Transactions of the American Fisheries Society 137: 1683 – 1700.
E. E., Werner, and D. J. Hall. 1988. Ontogenetic habitat shifts in Bluegill: the foraging rate–predation risk trade‐off. Ecology 69: 1352 – 1366.
P. G., Wilmer, and D. M. Unwin. 1981. Field analyses of insect heat budgets: reflectance, size, and heating rates. Oecologia 50: 250 – 255.
T. M., Zaret, and R. T. Paine. 1973. Species introduction in a tropical lake. Science 182: 449 – 455.
S. A., Adlerstein, E. S. Rutherford, D. Clapp, J. A. Clevenger, and J. E. Johnson. 2007. Estimating seasonal movements of Chinook Salmon in Lake Huron from efficiency analysis of coded wire tag recoveries in recreational fisheries. North American Journal of Fisheries Management 27: 792 – 803.
W. I., Aron, and S. H. Smith. 1971. Ship canals and aquatic ecosystems. Science 174: 13 – 20.
D. C., Aultman, and J. M. Haynes. 1993. Spring thermal fronts and salmonine sport catches in Lake Ontario. North American Journal of Fisheries Management 13: 502 – 510.
R. P., Barbiero, M. Balcer, D. C. Rockwell, and M. L. Tuchman. 2009. Recent shifts in the crustacean zooplankton community of Lake Huron. Canadian Journal of Fisheries and Aquatic Sciences 66: 816 – 828.
J. W., Budd, T. D. Drummer, T. F. Nalepa, and G. L. Fahnenstiel. 2001. Remote sensing of biotic effects: zebra mussels (Dreissena polymorpha) influence on water clarity in Saginaw Bay, Lake Huron. Limnology and Oceanography 46: 213 – 223.
D. B., Bunnell, B. M. Davis, D. M. Warner, M. A. Chriscinske, and E. F. Roseman. 2011. Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish. Freshwater Biology 56: 1281 – 1296.
D. B. Bunnell, C. P Madenjian, and R. M. Claramunt. 2006. Long‐term changes in the Lake Michigan fish community following the reduction of the exotic Alewife (Alosa pseudoharengus). Canadian Journal of Fisheries and Aquatic Sciences 63: 2434 – 2446.
S. R., Carpenter, and J. F. Kitchell. 1988. Consumer control of lake productivity. BioScience 38: 764 – 769.
J. S., Diana 1987. Simulation of mechanisms causing stunting in Northern Pike populations. Transactions of the American Fisheries Society 116: 612 – 617.
J. S., Diana 1990. Food habits of angler‐caught salmonines in western Lake Huron. Journal of Great Lakes Research 16: 271 – 278.
M. P., Ebener, J. E. Johnson, D. M. Reid, N. P. Payne, R. L. Argyle, G. M. Wright, K. Krueger, J. P. Baker, T. Morse, and J. Weise. 1995. Status and future of Lake Huron fish communities. Pages 125 – 170 in M. Munawar, T. Edsall, and J. Leach, editors. The Lake Huron ecosystem: ecology, fisheries, and management. SPB Academic Publishing, Amsterdam.
R. F., Elliott, M. P. Ebener, R. W. Rybicki, P. J. Schneeberger, R. J. Hess, J. T. Francis, G. W. Eck, and C. P. Madenjian. 1996. Conducting diet studies of Lake Michigan piscivores: a protocol. U.S. Fish and Wildlife Service, Report 96‐3, Green Bay, Wisconsin.
R. L., Eshenroder, and M. K. Burnham‐Curtis. 1999. Species succession and sustainability of the Great Lakes fish community. Pages 145 – 184 in W. W. Taylor and C. P. Ferreri, editors. Great Lakes fisheries policy and management. Michigan State University Press, East Lansing.
G. L., Fahnenstiel, G. A. Lang, T. F. Nalepa, and T. H. Johengen. 1995. Effects of zebra mussel (Dreissena polymorpha) colonization on water quality parameters in Saginaw Bay, Lake Huron. Journal of Great Lakes Research 21: 435 – 448.
D. G., Fielder, and J. P. Baker. 2004. Strategy and options for completing the recovery of Walleye in Saginaw Bay, Lake Huron. Michigan Department of Natural Resources, Fisheries Special Report 29, Ann Arbor.
D. G., Fielder, and M. V. Thomas. 2014. Status and trends of the fish community of Saginaw Bay, Lake Huron, 2005–2011. Michigan Department of Natural Resources, Fisheries Research Report 03, Lansing.
T. B., Francis, and D. E. Schindler. 2009. Shoreline urbanization reduces terrestrial insect subsidies to fishes in North American Lakes. Oikos 118: 1872 – 1882.
M. J., Hansen 1999. Lake Trout in the Great Lakes: basinwide stock collapse and binational restoration. Pages 417 – 454 in W. W. Taylor and C. P. Ferreri, editors. Great Lakes fisheries policy and management. Michigan State University Press, East Lansing.
J. M., Hagar 1984. Diets of Lake Michigan salmonids and assessment of the dynamics of predator–prey interactions. Master’s thesis. University of Wisconsin, Madison.
K. J., Hartman, and F. J. Margraf. 1992. Effects of prey and predator abundances on prey consumption and growth of Walleyes in western Lake Erie. Transactions of the American Fisheries Society 121: 245 – 260.
K. J., Hartman, and F. J. Margraf. 1993. Evidence of predatory control of Yellow Perch (Perca flavescens) recruitment in Lake Erie, U.S.A. Journal of Fish Biology 43: 109 – 119.
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spelling ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/141251 2023-08-20T04:05:19+02:00 Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron Roseman, Edward F. Schaeffer, Jeffrey S. Bright, Ethan Fielder, David G. 2014-11 application/pdf https://hdl.handle.net/2027.42/141251 https://doi.org/10.1080/00028487.2014.945659 unknown Taylor & Francis Wiley Periodicals, Inc. Roseman, Edward F.; Schaeffer, Jeffrey S.; Bright, Ethan; Fielder, David G. (2014). "Angler‐Caught Piscivore Diets Reflect Fish Community Changes in Lake Huron." Transactions of the American Fisheries Society 143(6): 1419-1433. 0002-8487 1548-8659 https://hdl.handle.net/2027.42/141251 doi:10.1080/00028487.2014.945659 Transactions of the American Fisheries Society S. C., Riley, E. F. Roseman, S. J. Nichols, T. P. O’Brien, C. S. Kiley, and J. S. Schaeffer. 2008. Deepwater demersal fish community collapse in Lake Huron. Transactions of the American Fisheries Society 137: 1879 – 1890. D. J., Jude, R. H. Reider, and G. R. Smith. 1992. Establishment of Gobiidae in the Great Lakes basin. Canadian Journal of Fisheries and Aquatic Sciences 49: 416 – 421. SAS Institute. 2011. Base SAS 9.3 procedures guide: statistical procedures. SAS Institute, Cary, North Carolina. J., Savitz 2009. Diets of Lake Michigan salmon and maximum size of Alewife prey. Journal of Freshwater Ecology 24: 563 – 566. S. B., Brandt 1986. Food of trout and salmon in Lake Ontario. Journal of Great Lakes Research 12: 200 – 205. S. C., Riley, E. F. Roseman, M. A. Chriscinske, T. R. Tucker, J. Ross, P. Armenio, N. Watson, and W. Woelmer. 2014. Status and trends of the Lake Huron offshore demersal fish community, 1976–2013. U.S. Geological Survey, Annual Report to the Great Lakes Fishery Commission, Ann Arbor, Michigan. E. H., Brown 1972. Population biology of Alewives, Alosa pseudoharengus, in Lake Michigan, 1949–70. Journal of the Fisheries Research Board of Canada 29: 477 – 500. E. F., Roseman, and S. C. Riley. 2009. Biomass of deepwater demersal forage fishes in Lake Huron, 1994–2007: implications for offshore predators. Aquatic Ecosystem Health Management 12: 29 – 36. E. F., Roseman, J. S. Schaeffer, and P. Steen. 2009. Review of fish diversity in the Lake Huron basin. Aquatic Ecosystem Health Management 12: 11 – 22. S. A., Rush, G. Paterson, T. B. Johnson, K. G. Drouillard, G. D. Haffner, C. E. Hebert, M. T. Arts, J. D. McGoldrick, S. M. Backus, B. F. Lantry, J. R. Lantry, T. Schaner, and A. T. Fisk. 2012. Long‐term impacts of invasive species on a native top predator in a large lake system. Freshwater Biology 57: 2342 – 2355. R. W., Rybicki, and D. F. Clapp. 1996. Diet of Chinook Salmon in eastern Lake Michigan, 1991–93. Michigan Department of Natural Resources, Fisheries Division Research Report 2027, Lansing. J. S., Schaeffer 1994. Mechanisms regulating growth and food consumption of Walleyes and Yellow Perch in Saginaw Bay, Lake Huron. Doctoral dissertation. University of Michigan, Ann Arbor. J. S., Schaeffer, A. Bowen, M. Thomas, J. R. P. French III, and G. L. Curtis. 2005. Invasion history, proliferation, and offshore diet of Round Goby Neogobius melanostomus in western Lake Huron, USA. Journal of Great Lakes Research 31: 414 – 425. J. C., Schneider, editor. 2000. Manual of fisheries survey methods II with periodic updates. Michigan Department of Natural Resources, Fisheries Special Report 25, Lansing. S. H., Smith 1970. Species interactions of Alewife in the Great Lakes. Transactions of the American Fisheries Society 99: 754 – 765. G. R., Spangler, and J. J. Collins. 1992. Lake Huron fish community structure based on gill‐net catches corrected for selectivity and encounter probability. North American Journal of Fisheries Management 12: 585 – 597. D. J., Stewart, J. F. Kitchell, and L. B. Crowder. 1981. Forage fishes and their salmonid predators in Lake Michigan. Transactions of the American Fisheries Society 110: 751 – 763. H. A., Tanner, and W. H. Tody. 2002. History of the Great Lakes salmon fishery: a Michigan perspective. Pages 139 – 154 in K. D. Lynch, M. L. Jones, and W. W. Taylor, editors. Sustaining North American salmon: perspectives across regions and disciplines. American Fisheries Society, Bethesda, Maryland. D., Traynor, A. Moerke, and R. Greil. 2010. Identification of Michigan fishes using cleithra. Great Lakes Fishery Commission, Special Publication 2010‐2, Ann Arbor, Michigan. D. M., Warner, C. S. Kiley, R. M. Claramunt, and D. F. Clapp. 2008. The influence of Alewife year‐class strength on prey selection and abundance of age‐1 Chinook Salmon in Lake Michigan. Transactions of the American Fisheries Society 137: 1683 – 1700. E. E., Werner, and D. J. Hall. 1988. Ontogenetic habitat shifts in Bluegill: the foraging rate–predation risk trade‐off. Ecology 69: 1352 – 1366. P. G., Wilmer, and D. M. Unwin. 1981. Field analyses of insect heat budgets: reflectance, size, and heating rates. Oecologia 50: 250 – 255. T. M., Zaret, and R. T. Paine. 1973. Species introduction in a tropical lake. Science 182: 449 – 455. S. A., Adlerstein, E. S. Rutherford, D. Clapp, J. A. Clevenger, and J. E. Johnson. 2007. Estimating seasonal movements of Chinook Salmon in Lake Huron from efficiency analysis of coded wire tag recoveries in recreational fisheries. North American Journal of Fisheries Management 27: 792 – 803. W. I., Aron, and S. H. Smith. 1971. Ship canals and aquatic ecosystems. Science 174: 13 – 20. D. C., Aultman, and J. M. Haynes. 1993. Spring thermal fronts and salmonine sport catches in Lake Ontario. North American Journal of Fisheries Management 13: 502 – 510. R. P., Barbiero, M. Balcer, D. C. Rockwell, and M. L. Tuchman. 2009. Recent shifts in the crustacean zooplankton community of Lake Huron. Canadian Journal of Fisheries and Aquatic Sciences 66: 816 – 828. J. W., Budd, T. D. Drummer, T. F. Nalepa, and G. L. Fahnenstiel. 2001. Remote sensing of biotic effects: zebra mussels (Dreissena polymorpha) influence on water clarity in Saginaw Bay, Lake Huron. Limnology and Oceanography 46: 213 – 223. D. B., Bunnell, B. M. Davis, D. M. Warner, M. A. Chriscinske, and E. F. Roseman. 2011. Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish. Freshwater Biology 56: 1281 – 1296. D. B. Bunnell, C. P Madenjian, and R. M. Claramunt. 2006. Long‐term changes in the Lake Michigan fish community following the reduction of the exotic Alewife (Alosa pseudoharengus). Canadian Journal of Fisheries and Aquatic Sciences 63: 2434 – 2446. S. R., Carpenter, and J. F. Kitchell. 1988. Consumer control of lake productivity. BioScience 38: 764 – 769. J. S., Diana 1987. Simulation of mechanisms causing stunting in Northern Pike populations. Transactions of the American Fisheries Society 116: 612 – 617. J. S., Diana 1990. Food habits of angler‐caught salmonines in western Lake Huron. Journal of Great Lakes Research 16: 271 – 278. M. P., Ebener, J. E. Johnson, D. M. Reid, N. P. Payne, R. L. Argyle, G. M. Wright, K. Krueger, J. P. Baker, T. Morse, and J. Weise. 1995. Status and future of Lake Huron fish communities. Pages 125 – 170 in M. Munawar, T. Edsall, and J. Leach, editors. The Lake Huron ecosystem: ecology, fisheries, and management. SPB Academic Publishing, Amsterdam. R. F., Elliott, M. P. Ebener, R. W. Rybicki, P. J. Schneeberger, R. J. Hess, J. T. Francis, G. W. Eck, and C. P. Madenjian. 1996. Conducting diet studies of Lake Michigan piscivores: a protocol. U.S. Fish and Wildlife Service, Report 96‐3, Green Bay, Wisconsin. R. L., Eshenroder, and M. K. Burnham‐Curtis. 1999. Species succession and sustainability of the Great Lakes fish community. Pages 145 – 184 in W. W. Taylor and C. P. Ferreri, editors. Great Lakes fisheries policy and management. Michigan State University Press, East Lansing. G. L., Fahnenstiel, G. A. Lang, T. F. Nalepa, and T. H. Johengen. 1995. Effects of zebra mussel (Dreissena polymorpha) colonization on water quality parameters in Saginaw Bay, Lake Huron. Journal of Great Lakes Research 21: 435 – 448. D. G., Fielder, and J. P. Baker. 2004. Strategy and options for completing the recovery of Walleye in Saginaw Bay, Lake Huron. Michigan Department of Natural Resources, Fisheries Special Report 29, Ann Arbor. D. G., Fielder, and M. V. Thomas. 2014. Status and trends of the fish community of Saginaw Bay, Lake Huron, 2005–2011. Michigan Department of Natural Resources, Fisheries Research Report 03, Lansing. T. B., Francis, and D. E. Schindler. 2009. Shoreline urbanization reduces terrestrial insect subsidies to fishes in North American Lakes. Oikos 118: 1872 – 1882. M. J., Hansen 1999. Lake Trout in the Great Lakes: basinwide stock collapse and binational restoration. Pages 417 – 454 in W. W. Taylor and C. P. Ferreri, editors. Great Lakes fisheries policy and management. Michigan State University Press, East Lansing. J. M., Hagar 1984. Diets of Lake Michigan salmonids and assessment of the dynamics of predator–prey interactions. Master’s thesis. University of Wisconsin, Madison. K. J., Hartman, and F. J. Margraf. 1992. Effects of prey and predator abundances on prey consumption and growth of Walleyes in western Lake Erie. Transactions of the American Fisheries Society 121: 245 – 260. K. J., Hartman, and F. J. Margraf. 1993. Evidence of predatory control of Yellow Perch (Perca flavescens) recruitment in Lake Erie, U.S.A. Journal of Fish Biology 43: 109 – 119. IndexNoFollow Natural Resources and Environment Science Article 2014 ftumdeepblue https://doi.org/10.1080/00028487.2014.945659 2023-07-31T20:38:59Z Examination of angler‐caught piscivore stomachs revealed that Lake Trout Salvelinus namaycush, Chinook Salmon Oncorhynchus tshawytscha, and Walleyes Sander vitreus altered their diets in response to unprecedented declines in Lake Huron’s main‐basin prey fish community. Diets varied by predator species, season, and location but were nearly always dominated numerically by some combination of Alewife Alosa pseudoharengus, Rainbow Smelt Osmerus mordax, Emerald Shiner Notropis atherinoides, Round Goby Neogobius melanostomus, or terrestrial insects. Rainbow Trout Oncorhynchus mykiss (steelhead), Coho Salmon Oncorhynchus kisutch, and Atlantic Salmon Salmo salar had varied diets that reflected higher contributions of insects. Compared with an earlier (1983–1986) examination of angler‐caught predator fishes from Lake Huron, the contemporary results showed an increase in consumption of nontraditional prey (including conspecifics), use of smaller prey, and an increase in insects in the diet, suggesting that piscivores were faced with chronic prey limitation during this study. The management of all piscivores in Lake Huron will likely require consideration of the pervasive effects of changes in food webs, especially if prey fish remain at low levels.Received December 19, 2013; accepted June 30, 2014 Peer Reviewed https://deepblue.lib.umich.edu/bitstream/2027.42/141251/1/tafs1419.pdf Article in Journal/Newspaper Atlantic salmon Salmo salar University of Michigan: Deep Blue Transactions of the American Fisheries Society 143 6 1419 1433

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