Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Atheriniformes Atherinopsidae

Scientific Name: Colpichthys hubbsi
Species Authority: Crabtree, 1989

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(i,ii,iii) ver 3.1
Year Published: 2010
Date Assessed: 2007-05-25
Assessor(s): Findley, L., Collette, B. & Espinosa, H.
Reviewer(s): Carpenter, K., Polidoro, B. & Livingstone, S. (Global Marine Species Assessment Team)
This species is only known from the northern Gulf of California and the Colorado River delta, where it has an extent of occurrence of less than 5,000 km². It is a very shallow water species that is threatened by ongoing and severe habitat destruction and shrimp aquaculture development throughout its restricted range. It is listed as Endangered under Criterion B.

Geographic Range [top]

Range Description: This species is endemic to the Eastern Pacific, and is found in the uppermost part of the Gulf of California in the Colorado River Delta.
Countries occurrence:
FAO Marine Fishing Areas:
Pacific – eastern central
Number of Locations: 1
Lower depth limit (metres): 4
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: No population information is available for this species.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: This species is found in shallow water over mud, and over muddy sandy substrates to depths of four m.
Systems: Marine

Threats [top]

Major Threat(s): This species is threatened by habitat degradation due to the cessation of flow from the Colorado River and by shrimp aquaculture development. Estuaries, riparian, wetland, and tidal areas of the the Colorado River delta have been reduced by over 90% since dam construction begin in the early 20th century. Currently, this species has an extremely restricted geographic range in the upper Gulf of California and Colorado River delta region, and likely represents a relict population. It has an extent of occurrence of 5,000 km², but its area of occupancy is not known given the current degraded state of its delta habitat.

Conservation Actions [top]

Conservation Actions: There are no specific conservation measures for this species. However, it is found in the Colorado River Delta Biosphere Reserve (WDPA 2006).

Citation: Findley, L., Collette, B. & Espinosa, H. 2010. Colpichthys hubbsi. The IUCN Red List of Threatened Species 2010: e.T183457A8116697. . Downloaded on 08 October 2015.
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