shortnose sucker

shortnose sucker
Name	Shortnose sucker
Status	EN
Status system	IUCN3.1
Genus	Chasmistes
Species	brevirostris
Authority	Cope, 1879

shortnose sucker

The shortnose sucker is a freshwater fish native to western North America, notable for its role in regional freshwater ecosystems and for conservation concern. It is a member of the catostomid assemblage and figures in management plans and legal actions related to aquatic conservation. Scientists, conservationists, and agencies have studied its biology, distribution, and recovery alongside other imperiled taxa.

Taxonomy and nomenclature

The species was described by Edward Drinker Cope in the 19th century and placed in the genus Chasmistes, a lineage recognized by taxonomists in revisions and cladistic analyses alongside other genera treated in monographs by institutions such as the Smithsonian Institution and research published through the American Fisheries Society. Nomenclatural history has seen comparisons with species described by early ichthyologists associated with museums like the California Academy of Sciences and correspondence among curators at the Field Museum of Natural History. Systematic work has referenced regional faunal surveys compiled by the U.S. Fish and Wildlife Service and genetic studies using techniques developed at universities including University of California, Davis and Oregon State University.

Description

Adults exhibit the stout, fusiform body typical of catostomids and possess a truncated, subterminal mouth adapted for benthic feeding, as described in guides from the American Museum of Natural History and field keys used by biologists at the Bureau of Land Management. Morphological characters were documented in species accounts prepared for the National Park Service and regional ichthyofaunal atlases produced by the Washington Department of Fish and Wildlife. Diagnostic traits are compared in comparative tables in publications from the University of Washington and the Montana Fish, Wildlife & Parks.

Distribution and habitat

Historically recorded from lakes and river systems in western North America, distributional records have been compiled by the U.S. Geological Survey, state natural heritage programs such as the California Natural Diversity Database, and provincial agencies like BC Ministry of Environment. Specimen records reside in collections at institutions including the University of California Museum of Vertebrate Zoology and the California Academy of Sciences. Habitat descriptions appear in management plans from the Bureau of Reclamation and habitat assessments by the U.S. Forest Service and regional conservation NGOs like The Nature Conservancy.

Behavior and ecology

Ecological roles have been discussed in ecosystem syntheses published with contributions from researchers at the University of Oregon and the Oregon Watershed Enhancement Board. Feeding behavior and trophic links are treated in studies coordinated with the Pacific States Marine Fisheries Commission and cited by conservation groups such as Defenders of Wildlife. Interactions with co-occurring taxa are recorded in surveys conducted by the Idaho Department of Fish and Game and academic teams from University of Idaho.

Life history and reproduction

Life history parameters, including growth, age at maturity, and spawning periodicity, were examined in reports from the U.S. Fish and Wildlife Service and peer-reviewed articles from journals affiliated with the Ecological Society of America and the Society for Conservation Biology. Reproductive timing and habitat requirements are described in recovery plans prepared by state agencies like the Nevada Department of Wildlife and federal technical memos produced by the Fishery Research Institute at academic centers such as Washington State University.

Conservation status and threats

The species appears on lists maintained by the U.S. Fish and Wildlife Service and is the subject of Endangered Species Act consultations involving agencies such as the Bureau of Reclamation and the National Marine Fisheries Service. Threat assessments have been published by NGOs including World Wildlife Fund and compiled in regional biodiversity reports coordinated by the Western Association of Fish and Wildlife Agencies. Primary threats documented in conservation literature include habitat alteration from projects managed by the U.S. Army Corps of Engineers, invasive species concerns raised by the Aquatic Nuisance Species Task Force, and water allocation issues litigated in state courts and discussed in policy forums such as the Pacific Northwest Waterways Association.

Management and recovery efforts

Recovery planning has involved multi-agency collaborations among the U.S. Fish and Wildlife Service, state wildlife agencies like the California Department of Fish and Wildlife, tribal governments such as the Nez Perce Tribe, and conservation organizations including The Nature Conservancy and Wildlife Conservation Society. Management actions described in technical bulletins by the Bureau of Reclamation include habitat restoration, breeding and hatchery programs coordinated with university partners such as Oregon State University, and monitoring frameworks developed with the U.S. Geological Survey. Legal and planning frameworks reference statutes administered by the U.S. Department of the Interior and coordination with regional planning bodies including the Columbia River Inter-Tribal Fish Commission.

Category:Chasmistes Category:Endangered fish of North America