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1 1 141. Describe spawnas~g requirements. The spawning act for Colorado squawfish has never been described, but hatchery culture of the species has been acccx~rplished. Understanding of this life history require- ment is vital to the recovery effort. Observation of hatchery brood fish, tracking wild fish with sonar or radio tags, and other non-lethal techniques will be employed. 142. Describe food habits and feeding behavior and age and growth. Score information has already been collected, but further investigations are necessary to evaluate life history ' requirements. This phase of the recovery effort can be performed in natural habitats and perhaps refugia. ' Preserved specimens, hatchery-reared fish and wild fish will be studied by collecting scale samples, length and weight data, and non-lethal stanach samples. ' 143. Study population dynamics. Field studies to determine ccxYq~etition, predation, and other biological interactions will be closely coordinated 144. Compile historical population data. 1 1 ii with other aspects of the plan. Historical aspects of population abundance, distribution, migration and the life history, and other general biological information will be synthesized. Published and unpublished reports, newspaper stories, and knowledgeable persons with specific information about local areas will be checked.. 2. Restore Colorado squawfish populations to their former range. It will be necessary to stock fish-into suitable sites, and to manage the habitats and populations of reintroduced Colorado squawfish. 21. Reintroduce Colorado squawfish into suitable historic habitat. Colorado squawfish have been reared at the Willow Beach National Fish Hatchery. A hatchery coding system has been developed to consider genetic differences of geographically separated popu- lations. 211. Select suitable sites based on all available habitat data.. 19