Laserfiche WebLink
<br />002705 <br /> <br />to guard against the potential loss of broodstock that could result from a <br />catastrophic event, <br />. Evaluate genetics of captive bony tail chub. A genetic evaluation of captive <br />borrytail chub should be conducted This evaluation should determine the genetics <br />of borrytail chub broodstock, those cu"ently at Dexter National Fish Hatchery, and <br />those taken from the wild <br />. Obtain wild bony tail chub. An intensive collection effort should be initiated to <br />obtain additional wild bonytail chub from areas where they occur. A mechanism and <br />protocol has been establishedfor obtaining these individuals. Workers should be <br />prepared to properly hold and transport captured bony tail chub to refugia. Proper <br />protocol for the handling of individuals which maximizes survival should be <br />developed and revised as necessary, Quarantine procedures at refugia must be <br />enforced. <br />. Verify taxonomic status of individuals received at refugia. After stabilization, the <br />fish received at refugia must be inspected and their taxonomic status determined by <br />qualified personnel, A photograph of the fish on a 1 cm grid will be taken and made <br />available to interested persons. Each fish will be tagged and a record kept of its <br />. point of origin and other pertinent information. Non-lethal techniques should be <br />developed that can type specimens using tissues such asfin, gillfilaments, etc. <br /> <br />2. Reintroduce hatchery-reared bony tail chub into the wild. As additional bony tail chub <br />caught in the wild are secured in refugia, they will contribute toward broodstock that will <br />be used to augment the small number of bony tail chub remaining in the wild <br />. Develop and implement an artificial propagation and rearing plan. A plan should <br />be developed for bony tail chub propagation. The plan should identify the numbers of <br />fish needed, rates of stocking, size offish to be stocked, and where and when the fish <br />would be propagated cout reared. These actions are necessary to prevent the extinction <br />of the species, therefore the following actions are considered priority actions. <br />. Assess and refine propagation techniques to maximize survival in the wild. As <br />new information on propagation and maintenance techniques becomes available, <br />such techniques will be assessed and refined as necessary to maximize survival and <br />genetic diversity and minimize mortality. <br />. Maximize genetic diversity. Maintain and propagate bony tail chub with the <br />objective of maximizing and maintaining genetic diversity. The value of retaining <br />the genetic diversity of the Upper Basin bony tail gene pools will be recognized. It <br />is anticipated that at least 10 years captive propagation will ultimately be required. <br />. Rear bonytail chub to a size that promotes good post-stocking survival. Previous <br />studies on reintroduction efforts for razorback suckers and Colorado squawfish have <br />shown that stocking of larger fish results in greater survival. However, stocking of <br />individuals that have become dependent upon hatchery conditions may contribute <br />to low survival. Efforts should be made to determine and release the sized of <br />bony tail chub individuals that will yield maximum survival. <br />. Conduct experimental stocking of bony tail chub and identify priority recovery sites. <br />Adult bony tail chub can be used in the identification and evaluation of high priority <br />stocking sites. Their movement, survival, and habitat selection at various times of the <br />year may offer information on the limiting factors affecting bony tail chub survival and <br /> <br />5 <br />