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4 <br />stocked fish. <br />Products and Benefits <br />The following are the products and benefits that would be anticipated <br />from the proposed monitoring and research following experimental stocking of , <br />razorback sucker in the upper Colorado River: <br />1. Information on the movement and dispersal of hatchery-produced, <br />pond-reared razorback sucker released in the river. <br />2. Growth-rate information from known-age fish. <br />3. An assessment of aging techniques based on known-age razorback <br />sucker. <br />4. A comparison of habitat-use by hatchery-reared razorback sucker and <br />their wild counterparts. <br />5. Increased knowledge of the ecology of wild razorback sucker. <br />6. Increased knowledge of the usefulness of hatchery-reared fish for <br />augmenting the adult-size wild population; or using hatchery-reared <br />fish to restore previously occupied reaches. <br />7. Recommendations provided for other future research; for the utility <br />of stocking large numbers of fish to augment population numbers or <br />restore fish in previously occupied reaches. These recommendations <br />will be made in conjunction with genetic studies. <br />8. The utility of using a very small number of fish to experimentally <br />evaluate restoration or augmentation potential. <br />Limitations <br />Although this proposed research could provide important information to <br />the recovery of the razorback sucker in the upper Colorado River, some <br />36 <br />4 <br />4