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•` w t l`?avr\Sorv? ?. l?? I ?1 I I tL <br />A Protocol for the Wandl'ing and Transport of <br />Wild Colorado 5quawfish and Razorback Sucker <br />in the Upper Colorado River Basin <br />Although the Grand Valley area of the Colorado River is a remaining <br />stronghold for the squawfish and razorback sucker In the upper Colorado River, <br />their populations are severely depleted and their continued existence there is <br />far from assured. Razorback sucker In 'the upper Colorado River are rarer than <br />Co'lo'rado squawfish. Many questions concerning age structure, age at maturity, <br />reproduction, growth and survival, and other critical life history parameters <br />remain unanswered. <br />Genetic variability within and between stocks of wild razorback sucker <br />and Colorado squawfish needs to be identified. Until this is accomplished -it <br />must be assumed that genetic differences among stacks do occur, and it thus <br />becomes extremely important to preserve the gene pools of these populations. <br />Artificial propagation and experimental stocking may potentially be -important <br />components of any recovery program. But before any stocking of these species <br />occurs basic genetic questions that will influence the success or failure o a <br />propagation effort need to be answered. Research efforts to address the <br />unanswered life-history and genetic questions will require additional fish. <br />Because of 'Fu'ture fish research needs and the paramount importance to <br />protect gene pools of continued declining populations of wild -Fish, future <br />refugia/broodstock populations need to be developed soon. <br />A.) Proposal: <br />To establish upper basin refug'ia/broodstock populations of both Colorado <br />squawf'ish and razorback sucker. <br /> <br />i <br />f' <br />J i . <br />9001ZOG'd 59{9# 01H3N USZXZQ 1 0£T9 ?£L 909 00:DT 900Z,TG'1dYx