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~ 36 Hatchery augmentation This approach was listed by two respondents, and in both cases, augmentation was listed in conjunction with other means listed above. A specific criterion was suggested for a 180 mm length minimum for stocking hatchery-reared endemics (presumably referring to the four endangered big river species). Question 1 0: Have you, your agency, or associates attempted any of the above, and with what success (or failure)? Nine of the respondents answered in the negative for this question. The remaining responses were grouped by the same categories in Question 9: Sport fishery regulation Few of the approaches suggested by the respondents in the previous question have been attempted or evaluated. Other than obvious restrictions on harvest of endangered fishes, no regulations have been created or evaluated to limit the take of endemic species or promote the harvest of nonnative species within the Colorado River Basin. Conflicting recommendations from respondents on the use of trotlines for the harvest of catfish underscores the need for better information regarding the incidental take of endangered fishes caused by this angling method. In order to manipulate angling regulations through seasonal closures, reach closures, or tackle restrictions, the degree and timing of potential angling impact should be evaluated. Emergency closure of the tailwaters of Taylor Draw Dam on the White River, Colorado, to angling, which is now a continuing regulation, is a case in point of remedying a recognized, specific impact Several respondents cited a recent creel survey conducted in Utah on the Colorado River suggesting incidental take of endangered fishes was nonsignificant. A 1987 creel survey conducted on the Yampa River indicated daytime angling pressure on reaches containing endangered fishes was too low to generate harvest estimates for game fish species (CDOW, unpublished data). In Utah, the program for educating anglers to release captured endemics fishes, including the signing program, was considered very successful. No evaluation of the information and education program within Colorado has been undertaken. Concerning baitfish regulations, Utah suggested the regulations prohIbiting seining have had some success. No evaluation of similar regulations in Colorado have been undertaken. Implementation of stricter regulations regarding baitfish and seining has generally occurred too late, according to one respondent, to make a difference in drainages where problems already occur. Regulations serve only to discourage further introductions and the harvest of juvenile endangered native fishes.