Laserfiche WebLink
<br />002827 <br /> <br />For Colorado squawfish, broodstock development was initiated in 1991, and 17 family <br />lots currently exist from that effort, Due to the relatively "stable" status of Colorado squawfish <br />populations in Upper Basin rivers (Czapla 1997, McAda et aI, 1994, McAda et al. 1996), and <br />the limitations of hatchery and rearing facilities within the Program over the past 6 years <br />(Wydoski 1994, Czapla 1997), no further broodstock development has occurred within the 5 x <br />5 breeding matrix, nor have any stocking plans been developed to use progeny from the existing <br />broodstock held at Horsethief State Wildlife Area near Grand Junction, Colorado, <br /> <br />Twenty humpback chub were collected in September 1995 from the Black Rocks reach <br />of the Colorado River in Colorado near the state line, The purpose of this collection was to <br />create a refugia population to safeguard genetic material in the event of a catastrophic loss in the <br />Black Rocks population. No broodstock development or reintroduction objectives have been <br />identified for humpback chub in the Upper Basin due to the relative stability of five existing <br />populations in the Yampa, Desolation-Gray, Black Rocks, Westwater and Cataract Canyon sites. <br /> <br />To date, stocking and propagation planning within the Recovery Program has proceeded <br />on a reach by reach basis for select species, One of the recurring problems for guidance and <br />planning within the Recovery Program has been the identification of "long-term" fish needs for <br />propagation (beyond the upcoming year), and identification of facility requirements to meet <br />propagation needs for anticipated restoration stocking plans, This plan is intended to describe <br />restoration stocking needs anticipated for the listed fish species for all candidate rivers or river <br />reaches within the Upper Basin in the state of Colorado, Stock numbers needed over the next <br />five years were estimated according to biologically-based population objectives, and thereby <br />permit the estimation of propagation facilities required to meet these stocking objectives, The <br />plan will present required objectives, justification and risk assessment for each proposed stocking <br />scenario, <br /> <br />Stocking Plan Summary <br />The stocking plan is presented for each species by river reach, and by fish size and <br />season in which stocking will occur over a five year period, Numbers of fish required via <br /> <br />DRAFT - June 4, 1997 <br /> <br />3 <br />