TY - JOUR
T1 - Evaluation of temperature-selection differences among juvenile muskellunge originating from different latitudes
AU - Wagner, Curtis P.
AU - Wahl, David H.
N1 - Acknowledgements We thank M. Anderson, B. Bauer, J. Godbout, S. Ostrand, P. Port, and M. Wegener for field assistance. S. Butler made useful comments that improved the manuscript. We thank M. Hearn and the staff of the Minor E. Clark Fish Hatchery, Kentucky Department of Fish and Wildlife, for providing Cave Run Lake, KY, muskellunge. The Central Illinois Muskie Hunters (CIMH), Muskies, Inc. supported the study and purchased the Leech Lake, MN, fish. We thank J. Sacco and S. Rusteberg for help initiating the study and CIMH past-presidents J. Gillis, L. Nevling, D. Serck, and J. Sacco for ongoing support. Support was provided in part through funds administered by the Research Committee of Muskies, Inc. International and were coordinated by S. Budnik. Additional support was provided by Federal Aid in Sport Fish Restoration project F-151-R administered by the Illinois Department of Natural Resources. In particular, S. Pallo, S. Krueger, L. Dunham, and S. Stuewe helped coordinate activities with the Division of Fisheries, Illinois Department of Natural Resources. The Illinois Natural History Survey and the Department of Natural Resources and Environmental Sciences, University of Illinois, also provided support.
PY - 2007/6
Y1 - 2007/6
N2 - Genetic differences among muskellunge Esox masquinongy populations are related to residence in major river drainages, suggesting the existence of divergent stocks. By use of radio-telemetry we compared different seasonal and diel temperature selection in a southern Illinois reservoir for three geographically and genetically distinct stocks of age-2 muskellunge from throughout the latitudinal range of the species. Muskellunge from the Upper Mississippi River drainage were represented by the Leech Lake, Minnesota, population and the Ohio River drainage was represented by the Cave Run Lake, Kentucky, population. Progeny from North Spring Lake, Illinois, an interstock, or mixed-origin stock, were also evaluated. No differences in temperature selection were observed among stocks of juvenile muskellunge across seasons or diel periods. The seasonal mean temperatures of the water varied significantly-spring 21.7°C, summer 28.4°C, and fall 14.8°C, with an overall average temperature of 24.1°C, in agreement with previously published values obtained in laboratory trials. This lack of different temperature-selection patterns among stocks is in contrast with other life-history characteristics, for example growth, metabolism, and conversion efficiency, which have been shown to differ among populations and stocks.
AB - Genetic differences among muskellunge Esox masquinongy populations are related to residence in major river drainages, suggesting the existence of divergent stocks. By use of radio-telemetry we compared different seasonal and diel temperature selection in a southern Illinois reservoir for three geographically and genetically distinct stocks of age-2 muskellunge from throughout the latitudinal range of the species. Muskellunge from the Upper Mississippi River drainage were represented by the Leech Lake, Minnesota, population and the Ohio River drainage was represented by the Cave Run Lake, Kentucky, population. Progeny from North Spring Lake, Illinois, an interstock, or mixed-origin stock, were also evaluated. No differences in temperature selection were observed among stocks of juvenile muskellunge across seasons or diel periods. The seasonal mean temperatures of the water varied significantly-spring 21.7°C, summer 28.4°C, and fall 14.8°C, with an overall average temperature of 24.1°C, in agreement with previously published values obtained in laboratory trials. This lack of different temperature-selection patterns among stocks is in contrast with other life-history characteristics, for example growth, metabolism, and conversion efficiency, which have been shown to differ among populations and stocks.
KW - Adaptation
KW - Esox masquinongy
KW - Physiology
KW - Stock differentiation
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=34247382415&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34247382415&partnerID=8YFLogxK
U2 - 10.1007/s10641-006-9090-8
DO - 10.1007/s10641-006-9090-8
M3 - Article
AN - SCOPUS:34247382415
SN - 0378-1909
VL - 79
SP - 85
EP - 98
JO - Environmental Biology of Fishes
JF - Environmental Biology of Fishes
IS - 1-2
ER -