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<br />Table of Contents
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<br />Abstract.. ..... ...... ............... ............................. ................. ... ..... ........ .... ..... ....................... ....................... ... 4
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<br />In trod u ctio n................................. ........................ ................ ............................ ......... ......... 5
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<br />S urn Mary of Facilities ....... ............. ..... ... ..... ..... .... ..... ................. ................. .............. ......... ..... 6
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<br />Bubbling Ponds StateflSh Hatchery ..,.,........"...,........."..,.....".......,."........................11
<br />Dexter National Fish Hatchery ................. ..., ..................,..........,...................... ...... .... 11
<br />Grand Valley Native Fish Facility.,..,.,.,.......".,.......,...............,.....".......,.............,...... 12
<br />Ouray National Fish Hatchery............ ,...,..............................""...".., ......"......,....,,,... 14
<br />Willow Beach National Fish Hatchery ....."......"........,....".....".....,........."..............,.. 15
<br />Overview of Differences in Culture Methods ............................................................... 16
<br />General Information on Factors that Affect Fish Growth.......................................... 20
<br />Specific Information on Razorback Sucker Growth ................................................... 21
<br />Variable growth....,.....,..""..........."..."....,.,...............,...,,,......,,.....,,........,.,..,,......,,....., 21
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<br />Growth in ponds..,.,...............,.,.............,...,...,.............,..................."...."".............,..... 22
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<br />Temperature..,......,..."..................,,,............,.,........,.............,....,................................,, 23
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<br />Density......................,..,..,..................,.............,.,........,..........."....."........,.......,............ 23
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<br />Feed ration...................,..,.............,..,.,...........,...,....,..,........................,...............,......,. 23
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<br />Handling stress....."..........,.,.......................................,...,...,......................,.................. 24
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<br />Measuring Growth of Captive Fish............................................................................... 25
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<br />Con elusions ................ ... ........................... ... ............. ......... ..... ... ........ ... ............. ... ........ .,......... ....... ..... 26
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<br />Specific Research Reco mm en da tio ns .... .................... ............... ................... ........ .......... 28
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<br />Literature Cited .............. ................. ..... ... ................... ........... ... ... .............. ...... ......... ... ....... .... 29
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<br />Ackn ow led gemen ts ........... ...... .......... ..... ..... ......... ... ......... ...... ... ................... .......... ..... .... 35
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<br />A p pen dices.............. ........ .......... ...... ...... .... ......... ......... ....................... ... ...... ........ ............. 36
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<br />Appendix 1. Survey Questions.,........................ ................................................."..... 3 6
<br />Appendix 2. Follow-up Surveys................................................................................ 38
<br />Appendix 3. Tabulated Survey Results........................... ............,............................ 39
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<br />List of Tables and Figures
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<br />Table 1. List of locations that have been used to grow-out razorback suckers...... 7
<br />Table 2. Facilities available at major razorback sucker fish hatcheries................. 9
<br />Table 3. Water quality ranges at each culture facility. .......................................... 10
<br />Table 4. Stocking densities for larvae and fry in ponds. ..................................,..... 17
<br />Table 5. Rearing densities at intensive culture facilities. ................................,...... 17
<br />Table 6. Rearing practices that are unique to specific rearing facilities.........,..... 17
<br />Table 7. Types of feed used at razorback sucker hatcheries.........,........................ 18
<br />Table 8. Factors limiting production at major razorback sucker facilities.......,.. 18
<br />Table 9. Reported and calculated growth rates from the literature. .."."...."....... 19
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<br />Figure 1. Relationship between length and number offish per pound.................. 16
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