Measurement of Diporeia respiration rate for Lake Superior |
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| Affiliation: | 1. Department of Biological Sciences, Michigan Technological University, Houghton, MI, United States;2. Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI, United States;1. School of Environmental Sciences, University of Guelph, Bovey Building, Gordon St., Guelph, Ontario N1G 2W1, Canada;2. Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Highway, Dayton, OH 45435, United States;1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan;1. Large Lakes Research Station, 9311 Groh Road, Grosse Ile, MI 48138, USA;2. Z-Tech Corporation, ICF Company, Large Lakes Research Station, 9311 Groh Road, Grosse Ile, MI 48138, USA;3. United States Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, Large Lakes and Rivers Forecasting Research Branch, Large Lakes Research Station, 9311 Groh Road, Grosse Ile, MI 48138, USA;1. Aquatic Animal Health Program, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA;2. Department of Natural Resources, Bruckner Hall, Cornell University, Ithaca, NY 14853, USA;3. U.S. Geological Survey, Western Fisheries Research Center, Seattle, WA 98115, USA;1. Department of Biological Sciences, Wayne State University, 5047 Gullen Mall, Detroit, MI 48202, USA;2. United States Geological Survey, Great Lakes Science Center, Lake Michigan Ecological Research Station, 1100 N. Mineral Springs Road, Porter, IN 46304, USA;3. Environment & Public Health Research Unit, School of Environment and Technology, University of Brighton, Cockcroft Building, Lewes Road, Brighton BN2 4GJ, United Kingdom |
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| Abstract: | The freshwater amphipod Diporeia is a dominant macroinvertebrate species in Lake Superior’s benthic community and an important prey item for many fish. A capacity to predict growth and production rates of Diporeia using a bioenergetics model requires information on physiological processes of the species. The objective of this study is to quantify oxygen consumption of Lake Superior Diporeia and to determine if respiration rate changes with body length. Diporeia were collected from Lake Superior and kept over natural sediment maintained at 4 °C. Dissolved oxygen levels for groups of immature (2 mm), juvenile (4 mm), and adult (6 mm) Diporeia in 20 ml microcosms were measured using a polarographic microelectrode. Mass-specific respiration rates for Lake Superior Diporeia ranged from 32.0 to 44.7 mg O2 g DW? 1 day ?1. A significant relationship between body length and mass-specific respiration rate (p > 0.1) was not found. The estimate of Diporeia respiration presented here is significantly higher (p < 0.05) than previous findings from populations in Lakes Michigan and Ontario. This study provides new data on respiration rates of Lake Superior Diporeia and compares findings to studies for other connecting Great Lakes. |
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