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American brook lamprey ( Lampetra appendix ) Timothy Stewart

American brook lamprey ( Lampetra appendix ) Timothy Stewart. Iowa DNR. Identification: buccal disk; 7 gill apertures; no paired fins (to 26 cm) Distribution: northeast IA (e.g., Volga River); mid-central IA?

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American brook lamprey ( Lampetra appendix ) Timothy Stewart

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  1. American brook lamprey (Lampetra appendix)Timothy Stewart Iowa DNR Identification: buccal disk; 7 gill apertures; no paired fins (to 26 cm) Distribution: northeast IA (e.g., Volga River); mid-central IA? Habitat: riffles/runs over gravel/sand in streams; ammocoetes burrow; adults cling to rocks Minnesota DNR

  2. American brook lamprey (Lampetra appendix) Diet: organic matter, microbes (ammocoetes); adults nonfeeding Reproduction: 1,000-5,000eggs in sand depressions in spring; adults die after spawning Conservation status: IA status “threatened”; cool, clear water with gravel/sand critical?; abundance unknown Minnesota DNR

  3. American brook lamprey (Lampetra appendix) Economic/recreational value: unimportant to anglers Ecological importance: probably unimportant in IA due to rarity; process organic matter; eaten by piscivores Other: short adult life (fall to spring – nonfunctional digestive system); 4-7 years as ammocoetes

  4. References: Lampetra appendix Iowa Department of Natural Resources. 1994. IowaDNR Fish and Fishing. Available at http://www.iowadnr.com/fish/iafish/iafish.html. August 2004. Iowa Department of Natural Resources. Iowa’s threatened and endangered species. Available at http://www.state.ia.us/dnr/organiza/ppd/tespecies.htm. August 2004. Mayhew, J. 1987. Iowa Fish and Fishing. Iowa Department of Natural Resources, Des Moines, Iowa. Minnesota Department of Natural Resources. Fishes of Minnesota. Available at http://www.gen.umn.edu/research/fish/fishes. August 2004. Page, L.M. and B.M. Burr. 1991. Freshwater Fishes of North America North of Mexico. Houghton Mifflin Company, Boston.

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