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<br />.~. <br />'":~...."\ <br />, "y':f: <br /> <br />"'t, <br />~"'-.~) <br />.',7;/.,':/1 <br /> <br />...~. " <br /> <br />, <br /> <br />'IV. EstabliGh, i.f pO~f,ible, thl'ongh stocking an<l/Ol "I lie! mdn~gpment <br />practices a second, self-sustaining aggregation of humpback chub in either <br />the mainstream or a tributary in the project area. <br /> <br />A. Objecti ves <br /> <br />1. Determine spawning and rearing requirements for the humpback chub by <br />collecting data in the project area and from a review of other studies <br />over the species range. <br /> <br />2. Evaluate the availability of suitable habitat in the project area <br />using species requirements developed above and identify a priority list <br />of sites for this effort <br /> <br />J. If appropriate (based on IV Al and A2) I develop a reintroduction <br />program for the Mlected site(s) identifying the OPtimum size of fish, <br />rate of stocking, timing, and criteria for determining the success or <br />failure of this effort. Stocking or other management efforts and <br />monitoring will continue for five years at which time the Consultation <br />Team will recommend to the Service whether this effort sho1l1d be <br />continued. <br /> <br />B. Discussion <br /> <br />Spawning and rearing of early life stages of humpback chub appears to be <br />limited to the perennial. lower reach of the Little Colorado River due to <br />the operation of Glen Canyon Dam. EstabliShing other spawning and rearing <br />areas would reduce the dependency of the humpback chub on that one, <br />limited reach. BiOlogical and habitat data needed for this effort sbould <br />be available from studies identified in other conservation measures of <br />this biological opinion. <br /> <br />C. Time and Funding <br /> <br />The necessary studies should be conducted during Phase 2 of the Glen <br />Canyon Environmental Studies. The Service and Reclamation will evaluate <br />the reintroduction effort after five years to determine whether it should <br />continue. <br /> <br />Reclamation will fund this .effort. <br /> <br />6 <br />