Southwestern fishes and the enigma of "endangered species". Man's invasion of deserts creates problems for native animals, especially for freshwater fishes.
D000220:Adaptation, Biological; D000818:Animals; D001130:Arizona; D005075:Biological Evolution; D002140:California; D003120:Colorado; D004463:Ecology; D005399:Fishes; D009505:Nevada; D009516:New Mexico; D014481:United States; D014589:Utah; D014959:Wyoming