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1 <br />1 <br />0 <br />t <br /> <br /> <br /> <br /> <br /> <br />J <br />1 <br /> <br /> <br /> <br />i~ <br /> <br /> <br /> <br />and high on the head. Fins are large: pectoral fins (16[14-1$]) blunt-tipped; origin of <br />dorsal fin (rays 11-13 [10-14]} nearer snout than the base of caudal peduncle and also <br />anterior to the insertion of the pelvics (rays 10[9-11]); trailing edge of dorsal fin concave; <br />anal fin rays 7[7-8]; caudal fin deeply forked (rays 18[18-19]). <br />Other physical characteristics include fine scales (lateral line 90-116); vertebrae 44-50; <br />and 36-37 pharyngeal teeth. Adult flannelmouth suckers are usually greenish brown to <br />bluish gray on the back and upper sides, with deep yellow to orange-red lower sides, and <br />a pale white abdomen. The ventral surface of the head may be light pink. <br />Holden (1973) noted differences in coloration between flannehnouth suckers from the <br />Upper and Lower CRB. Upper CRB C. latipinnis were "usually dark brownish-green <br />dorsally, yellowish or orange laterally, and white ventrally..: ', whereas LCRB fish were <br />"...light tan on the back and silvery white on the sides and belly." Young individuals are <br />lighter colored all around, with silvery sides. Adult flannelmouth suckers over 762 mm <br />TL and 3.5 kg have been reported, but more typically adults are 400-500 mm TL and 1.S <br />kg. <br />Sexual dimorphism develops in the flannehnouth sucker during the breeding season. <br />Tuberculation on males is extensive and usually extends from the anal fin to the lower <br />lobe of the caudal fin. Females may also develop breeding tubercles, but only on the <br />ventral side of the caudal peduncle. <br />Final Report September 2002 <br />35 <br /> <br />Figure 4. Flannelmouth sucker Catostomus latipinnis. <br />