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channel catfish were 195 mm, 213 mm, 266 mm, 360 mm, 440 mm, and 480 mm for ages 1, 2, 3, <br />4, S, and 6. <br />One pectoral spine was removed from each of 14 channel catfish in 1997 for reading annuli and <br />making backcalculations of TL. These spines were sectioned near the distal end of the hollow <br />portion of the central leumen. For 13 fish the first annulus was visible in -this azea of the spine <br />although portions were eroded. The other five annuli were clearly visible. On the other fish the <br />sections were unintentionally taken distal to the hollow portion of the spine. The central leumen in <br />these sections was solid and only 5 annuli were present, even though this was also a six year old fish. <br />Length at age backcalculations were not made for this fish because of the missing annuli. <br />Table 5. Comparison of backcalculated mean total lengths (mm) by age for channel catfish from <br />Kenney Reservoir and other waters. <br />Water age 1 a e 2 age 3 a e 4 age 5 a e 6 <br />Kenney Res 109 184 244 344 404 472 <br />Oklahoma 160 224 282 333 381 460 <br />watersa <br />Colorado 234 297 333 376 538 <br />watersa <br />Powder (mean of 246 286 300 340 <br />River, WYb 2 years) <br />Platte 84 147 200 249 290 346 <br />River, NE` <br />Utah 78 175 238 307 368 424 <br />Lakes <br />2 Lazge (mean 231 286 298 346 368 <br />waters, NMe values) <br />2 Small (mean 249 314 364 421 449 <br />waters, NMe values) <br />Turbid Res. 76 152 213 261 310 358 <br />OKf <br />Grayrocks 259 366 <br />Res, WYg <br />aCazlander (1969),bGerhazdt and Hubert (1991); Holland and Peters (1992), Sigler and Sigler <br />(1987), eCole et al (1991), (Calhoun (1966), gO'Shea and Hubert (1991) <br />14 <br />