. Bulletin. Science; Natural history; Natural history. COLORADO RIVER FISHES 77. Fig. 3. Xyrauchen texanus: Individual variation in asterisci from archaeological sites; A, CA-RIV- 3682; B, CA-RIV-3793; C, CA-RIV-2196; D, CA-RIV-3793. along the lower Colorado River (Castetter and Bell 1951; Miller 1955; La Rivers 1962). Razorback suckers which reached a meter and 6 kg (Minckley 1973) were easily snared by pulling grab hooks through a school (Sigler and Miller 1963). "Old timers" in Phoenix considered them an excellent food (Minckley 1973). The cui-ui, Chasmistes cujus, another plankti
. Bulletin. Science; Natural history; Natural history. COLORADO RIVER FISHES 77. Fig. 3. Xyrauchen texanus: Individual variation in asterisci from archaeological sites; A, CA-RIV- 3682; B, CA-RIV-3793; C, CA-RIV-2196; D, CA-RIV-3793. along the lower Colorado River (Castetter and Bell 1951; Miller 1955; La Rivers 1962). Razorback suckers which reached a meter and 6 kg (Minckley 1973) were easily snared by pulling grab hooks through a school (Sigler and Miller 1963). "Old timers" in Phoenix considered them an excellent food (Minckley 1973). The cui-ui, Chasmistes cujus, another planktivorous sucker, was very popular with the Northern Paiute of Pyramid Lake, Nevada (Follett 1982). Despite attaining a greater size in the more sluggish parts of the Colorado River than in its head- waters (La Rivers 1962), razorback suckers have suffered greatly as a result of the reservoir system installed along the Colorado River. Though its larvae have been found in Lake Havasu on the Colorado River for the first time since the 1950's (Marsh and Papoulias 1989), the lack of planktonic food during the critical post hatching period between 19 and 28 days may explain the general lack of recruit- ment throughout its range (Papoulias and Minckley 1990). Predation by exotic fishes also limits its recruitment (Minckley 1983). Lake Cahuilla probably had the warmer temperatures reported by Tyus and Karp (1990) preferred by razorback suckers, as well as abundant plankton, and no exotic Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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