Notropis simus pecosensis
SPECIES CODE: E04F V01
Listed Threatened with Critical Habitat on February 20, 1987 (52 FR 5295
5303).† Recovery Plan completed on September 30, 1992.
The Pecos bluntnose shiner is a
subspecies of Notropis simus, of the Cyprinidae family.† This fish can reach lengths o up to 3.5inches
(9cm), and live up to three years.† The
species feeds on terrestrial organic material, terrestrial invertebrates,
detritus, and filamentous algae (NatureServe Explorer 2001).
regarding reproduction and development is lacking.
RANGE AND POPULATION LEVEL:
simus historically occurred in the Rio Grande
in New Mexico from El
Paso, Texas north to near
Abiquiu Reservoir on the Chama River,
and in the Pecos River
in New Mexico from the upper
reaches of Avalon Reservoir north to 1 mile (1.6km) above Santa
subspecies, Notropis simus pecosensis, was historically found in the Pecos
River from just north of the town
of Santa Rosa, New
Mexico, downstream to the town of Carlsbad,
simus pecosensis is still extant throughout a large portion of its range,
and is now known to occupy the mainstream Pecos
River from near the town of Fork
Sumner, New Mexico,
downstream to the town of Artesia, New
Mexico, a distance of 175 miles (282km).† However, habitat for the species in this
stretch is spotty and often marginal, and the present numbers of Notropis
simus pecosensis are much reduced.
1982, Notropis simus pecosensis was collected most frequently in the
main stream channel, over a sandy substrate with low velocity flow, and at
depths between 7 inches and 16 inches (17-41cm).† Backwaters, riffles, and pools were also used
by younger individuals.† Natural springs,
such as those in the Santa Rosa and
areas, also serve as habitat for Notropis simus pecosensis, and are
sources of continuous water flow (New Mexico Department of Fame and Fish 1982).
most important factor in the speciesí decline is reduced flow in the main
channel of the river due to water storage, irrigation, and water diversion.
Threats to the continued survival and
recovery of Notropis simus pecosensis include restricted flow from
reservoirs, water diversions for irrigation, siltation, and pollution from
agricultural activities along the river.†
These habitat modifications have been detrimental to all fish species in
the Pecos River, including Notropis simus pecosensis.
NatureServe Explorer: An online encyclopedia
of life [web application]. 2001. Version 1.6 . Arlington, Virginia, USA: NatureServe. Available:
http://www.natureserve.org/explorer. (Accessed: August 13, 2002 ).
Mexico Department of Game and Fish. 1982. The status of Notropis simus
pecosensis in the Pecos River of New Mexico, with notes on life history and
ecology. Report to the U.S.
Fish and Wildlife Service, Office of Endangered Species, Albuquerque,
New Mexico. 53pp.
Fish and Wildlife Service. 1987. Determination of Threatened Status for Notropis
simus pecosensis (Pecos Bluntnose Shiner). Federal Register (52) 34: