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<br />Figure 45. Arizona roundtail chubs! <br />chara/ito a/eta redonda, each ca. <br />17.5 cm in total length: Upper: <br />Aravaipa Creek; and Lower: Virgin <br />River at Littlefield. Roundtail <br />chubs exist as a confusing array <br />of subspecies and local forms. all <br />of which have suffered severe <br />reductions in range. The Virgin <br />chub is listed as endangered. <br /> <br /> <br /> <br />pool habitats, often in association with beds of <br />submergent vegetation or other kinds of cover such <br />as fallen trees and brush. Males develop sharply <br />bicolored bodies, dark above and whitened below, <br />and have reddening of the bases of the paired fins <br />and often along the lips and on the opercles. Females <br />also may develop darkened bodies and red pigments, <br />although typically not so intense as males. In certain <br />areas, roundtail chubs constitute a significant game <br />fish. Large adults readily take artificial and natural <br />baits, and provide considerable sport on <br />appropriately light fishing tackle. <br />Yaqui and desert chubs (Figs. 46-47) were only <br />recently separated as distinct species. The former is <br />restricted to the uppermost Rio San Bernardino, <br />mostly in the United States in extreme southeastern <br /> <br /> <br />~ <br />. ~" <br /> <br />_ ~Iit":"~ <br /> <br />Figure 46. Yaqui chub!chara/ito Yaqui, 55 mm in total <br />length, from Leslie Creek, Arizona. Males of this species <br />become metallic blue-gray in breeding season. Restricted tc <br />the drainage of San Bernardino Creek in Arizona and <br />Sonora, it is listed as endangered. <br /> <br />23 <br />