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GOAL: Restore and maintain a minimum of five self-sustaining humpback chub populations in the Colorado Rivet system by 1990. 1. Determine hum back chub habitat re uirements and areas of essential habitat. 11. Quantify habitat requirements and limiting factors. 111. Determine the h sical and chemical characteristics of the habi- tat used by present populations, including spawning areas. 1i2. Determine biological habitat characteristics. 113. Establish historical and current reasons for reduced numbers and distribution. 12. Identify essential habitat. 121. Research methods of identifying and analyzing natural spawning and nurse sites mi ation routes or other habitats. 122. Recommend consultants or agencies to research and analyze keg hab= 123. Determine the location and status of available and otential habitat, 2. Protect and manage the humpback chub and •its habitat so wild populations are increased and/or maintained. O RTO 21. Locate all existing populations by conductin Gies inventories n suspected habitats. 22. Determine o ulation status and levels needed to maintain five secure populations. 221. Research methods of determining population dynamics and the biological potential of the species to respond to management. 222. Research non lethal sampling techniques to collect humpback chubs and sympatric species effective. 223. Determine population size and structure through taggin or otherwise marking). 224. Recommend contractors and agencies to implement population monitoring techniques. • 23. When deemed desirable, reintroduce marked humpback chubs (wild or hatche stock into five stable habitats to achieve desired densities of spawning adults. 231. Su lenient four existin o ulations with stocked fish if deemed necessary. 232. Plant hum back chubs into urioccu ied areas when habitat is restored and maintained. ' 233. Evaluate the success of possible reintroduction programs. 10