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| Cisco (fish) | |
|---|---|
| Name | Cisco |
| Status | VU |
| Status system | IUCN3.1 |
| Regnum | Animalia |
| Phylum | Chordata |
| Classis | Actinopterygii |
| Ordo | Salmoniformes |
| Familia | Salmonidae |
| Genus | Coregonus |
| Species | Coregonus artedi |
| Binomial | Coregonus artedi |
Cisco (fish) is a freshwater whitefish in the family Salmonidae, historically recognized as Coregonus artedi and commonly called cisco, lake herring, or northern cisco. It is a pelagic planktivore of cold, oxygenated lakes and boreal rivers of North America and was central to regional fisheries, indigenous subsistence, and ecological networks involving piscivores and zooplankton. Cisco populations have been studied in contexts ranging from glacial refugia and postglacial colonization to modern conservation policy and lake management.
The taxonomic treatment of ciscoes has been debated since 19th-century descriptions by naturalists working contemporaneously with collectors associated with institutions like the Smithsonian Institution, Royal Ontario Museum, and Academy of Natural Sciences. Nomenclatural issues involve original species concepts used by taxonomists influenced by Linnaean nomenclature, and subsequent revisions by ichthyologists referencing type specimens in museum collections such as the Natural History Museum, American Museum of Natural History, and Field Museum. Molecular phylogenetics using mitochondrial DNA and nuclear markers has connected studies at universities with those at research centers including the Great Lakes Environmental Research Laboratory and Fisheries and Oceans Canada, revealing cryptic diversity consistent with separate management units recognized by agencies like the U.S. Fish and Wildlife Service and Environment and Climate Change Canada. Debates involve the application of the Biological Species Concept versus the Evolutionary Significant Unit framework promoted in conservation circles and by organizations like the International Union for Conservation of Nature.
Morphological descriptions in keys used by state agencies such as the Minnesota Department of Natural Resources, Ontario Ministry of Natural Resources, and Michigan Department of Natural Resources emphasize characters like gill raker counts, branchiostegal ray morphology, and coloration used by taxonomists at institutions such as Cornell University, University of Michigan, and University of Wisconsin. Diagnostic features distinguish cisco from sympatric taxa described in guides from the American Fisheries Society and textbooks from Oxford University Press and Cambridge University Press. Identification relies on meristic data compared against collections at the Natural History Museum of Los Angeles County and regional museums, with work by ichthyologists publishing in journals such as Copeia, Transactions of the American Fisheries Society, and Journal of Fish Biology.
Cisco occur across boreal and temperate regions shaped by Pleistocene glaciation and postglacial dispersal routes analyzed by geologists at the Geological Survey of Canada and U.S. Geological Survey. Key waters include the Laurentian Great Lakes, inland systems in Minnesota, Ontario, Quebec, Alaska, and boreal provinces studied by Parks Canada and state park systems. Habitat associations are described in limnological surveys by the Great Lakes Research Consortium, freshwater ecology programs at universities like University of Toronto and McGill University, and environmental monitoring by the International Joint Commission. Cisco inhabit pelagic zones of deep, oligotrophic lakes, often stratified in summer; these conditions are the focus of work by limnologists at the Max Planck Institute for Limnology and the Helmholtz Centre.
Ecological interactions place cisco within food webs involving predators such as lake trout, walleye, pike, and human fisheries monitored by NOAA Fisheries, coordinate with trophic studies from Rutgers University and University of Minnesota. Behavioral ecology including diel vertical migration, schooling, and feeding on zooplankton has been quantified in projects affiliated with Woods Hole Oceanographic Institution, University of British Columbia, and Scripps Institution of Oceanography. Parasite and disease dynamics have been examined by veterinary researchers at Ohio State University and University of Guelph. Ecosystem roles connect to nutrient cycling and primary production work undertaken by the Smithsonian Environmental Research Center and the Limnological Research Center.
Life-history traits such as age at maturity, growth rates, longevity, and spawning phenology have been documented by fisheries biologists at agencies like the Wisconsin Department of Natural Resources, Minnesota Department of Natural Resources, and Iowa Department of Natural Resources. Reproductive behavior includes fall and winter spawning in benthic habitats described in theses from Michigan State University and University of Alaska Fairbanks. Larval ecology and recruitment processes have been modeled in studies supported by the National Science Foundation, Natural Sciences and Engineering Research Council of Canada, and various university research labs. Stock structure assessments have been used by regional management boards and intergovernmental bodies including the Great Lakes Fishery Commission.
Conservation concerns for cisco populations have been highlighted by IUCN assessments, provincial Red Lists in Canada, and state listings in the United States, prompting recovery planning by agencies such as U.S. Fish and Wildlife Service and Fisheries and Oceans Canada. Threats include invasive species like alewife and rainbow smelt documented by research from Cornell University and Michigan State University, habitat alteration from dams and shoreline development reviewed by the World Wildlife Fund, pollutant impacts assessed by Environment Canada, and climate-driven warming evaluated by the Intergovernmental Panel on Climate Change. Conservation measures involve captive breeding programs at hatcheries, habitat restoration projects led by conservation NGOs such as The Nature Conservancy, and regulatory actions guided by legislation including the Endangered Species Act.
Cisco supported commercial fisheries historically managed by provincial and state agencies, commercial firms in Great Lakes ports such as Duluth and Milwaukee, and indigenous fisheries governed by tribal authorities and First Nations. Market uses included fresh and smoked products sold through regional cooperatives, and scientific assessments by the Great Lakes Fishery Commission informed quota and harvest strategies. Human interactions also encompass recreational angling studied by universities and NGOs, cultural importance recognized by museums and cultural institutions, and economic analyses conducted by departments of commerce and fisheries economics groups.