Appendix B. Values of range size (species' rarity), frequency of local extirpation, and perceived level/source of extinction risk for native fishes of the Lower Colorado River Basin examined in our study.
Species |
Range size |
Frequency |
Extinction risk |
|
Level |
Primary source |
|||
Catostomidae |
|
|||
Catostomus clarkii, desert sucker† |
38.3 |
0.29 |
None/Low |
Environ |
Catostomus discobolus, bluehead sucker |
11.1 |
0.41 |
None/Low |
Biotic |
Catostomus insignis, Sonora sucker† |
29.3 |
0.24 |
None/Low |
Biotic |
Catostomus latipinnis, flannelmouth sucker |
4.0 |
0.75 |
None/Low |
Environ |
Xyrauchen texanus, razorback sucker |
3.7 |
0.72 |
High |
Environ |
Cyprinidae |
||||
Gila cypha, humpback chub |
2.5 |
0.56 |
High |
Biotic |
Gila elegans, bonytail |
0.5 |
0.91 |
High |
Biotic |
Gila intermedia, Gila chub† |
7.7 |
0.40 |
Moderate |
Biotic |
Gila nigra, headwater chub† |
2.3 |
0.28 |
Moderate |
Biotic |
Gila robusta, roundtail chub |
17.7 |
0.41 |
Moderate |
Biotic |
Lepidomeda mollispinis, Virgin R. spinedace† |
2.2 |
0.80 |
High |
Environ |
Lepidomeda vittata, Little CO. R. spinedace† |
3.6 |
0.33 |
High |
Biotic |
Meda fulgida, spikedace† |
4.2 |
0.40 |
High |
Biotic |
Plagopterus argentissimus, woundfin† |
0.6 |
0.77 |
High |
Environ |
Ptychocheilus lucius, Colorado pikeminnow |
0.0 |
1.00 |
Moderate |
Environ |
Agosia chrysogaster, longfin dace |
40.9 |
0.21 |
None/Low |
Biotic |
Rhinichthys osculus, speckled dace |
40.6 |
0.36 |
None/Low |
Biotic |
Rhinichthys cobitis, loach minnow† |
5.8 |
0.23 |
High |
Biotic |
Cyprinodontidae |
||||
Cyprinodon macularius, desert pupfish† |
0.0 |
0.73 |
High |
Biotic |
Poeciliidae |
||||
Poeciliopsis occidentalis, Gila topminnow |
3.7 |
0.51 |
High |
Biotic |
Salmonidae |
||||
Oncorhynchus gilae apache, Apache trout† |
4.5 |
0.53 |
High |
Biotic |
Oncorhynchus gilae gilae, Gila trout† |
0.3 |
0.92 |
High |
Biotic |
† Species endemic to the Lower Colorado River Basin.