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<br />( <br /> <br />,.~ <br />o <br />r":) <br />v~ <br />-.:J <br />VJ <br /> <br />Collections will be made using a variety of <br />techniques, including; electrofishing, trammel <br />netting, block and shock, drifting trammels, scare <br />and snare, and other applicable methods. Native <br />fish collected will be measured and released. <br />Endangered species will be weighed, measured, PIT <br />tagged, and implanted with radio transmitters if <br />fish are of sufficient size to accept a <br />transmitter. In addition, habitat data and tissue <br />for genetic analyses will be collected from target <br />species. <br /> <br />Subsequent to implantation of radio transmitters <br />the Service will organize tracking trips (with <br />participation from cooperating agencies) <br /> <br />A similar effort will be conducted in the lower San <br />Juan River and upper San Juan arm of Lake Powell <br />under the' lead of Reclamation. <br /> <br />Status: <br /> <br />CATEGORY- EARLY LIFESTAGE RESEARCH <br /> <br />Lead Agency: <br /> <br />( <br /> <br />Tasks: <br /> <br />Timeline: <br /> <br />Objectives: <br /> <br />l <br /> <br />Ongoing Core Research Program <br />Utah Division of Wildlife Resources <br /> <br />Larval drift sampling <br />Distribution of larval and YOY fish <br />Overwinter survival of young fish <br /> <br />Duration of research program, Phase I-III <br /> <br />Determine annual Colorado squawfish YOY recruitment <br />(i.e. reproductive success) in relation to yearly <br />flow patterns in the San Juan River <br /> <br />Identify timing and location of Colorado squawfish <br />spawning in the San Juan River utilizing size and <br />distribution of drifting larvae <br /> <br />Characterize the early life stage ichthyofaunal <br />community in low velocity habitats <br /> <br />Estimate the relative influence of larval <br />emigration on the squawfish population in the San <br />Juan drainage. <br /> <br />Determine the relationship between over-winter <br />survival and flow patterns in the San Juan River <br /> <br />11 <br />