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Last modified
8/11/2009 11:32:55 AM
Creation date
8/10/2009 3:21:15 PM
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UCREFRP
UCREFRP Catalog Number
7321
Author
U.S. Fish and Wildlife Service.
Title
Fish and Wildlife Service Upper Colorado River Basin Technical Advisory Study Important Reach Analysis - CRFP.
USFW Year
1984.
USFW - Doc Type
\
Copyright Material
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<br />Juvenile Colorado Squawfish (60-450 mm) Habitat <br /> <br />Assumptions : <br /> <br />1. Juvenile Colorado squawfish utilize select reaches of river <br />as evidenced by a higher electrofishing catch rate and at <br />least as many juveniles as adults in the collections. <br /> <br />( :' I~ ~I f . ~.. -~ l.. ........ <br /> <br />Classification: Juvenile Colorado squawfish high deB&i,.t.y areas. <br /> <br />Criteria <br /> <br />1. Juvenile Colorado squawfish electrofishing catch rate exceeds <br />0.30 fish per hour. <br /> <br />2. Juvenile Colorado squawfish represent at least 50% of the total <br />juvenile and adult captures. <br /> <br />Classification: Juvenile Colorado squawfish concentration areas <br /> <br />Criteria <br /> <br />1. Juvenile Colorado squawfish e1ectrofishing catch rate exceeds 0... a <br />.... fish per hour. <br />/ <br /> <br />2. Juvenile Colorado squawfish represent at least 50% of the total <br />juvenile and adult captures. <br /> <br />pa ta Sources: <br /> <br />CRFP data files <br /> <br />"- <br /> <br />Miller. et ale 1982. Colorado River fishery project. fin~ report. <br />Part 2. field investigations. pp. 32-33 and 137-141. <br /> <br />Data Summaries: Tables 5-8 <br /> <br />Adult Habitats <br /> <br />Assumptions : <br /> <br />1. Adult Colorado squawfish utilize select reaches of river as <br />evidenced by a higher electrofishing catch rate and at least <br />as many adults as juveniles in the collections. <br /> <br />... <br /> <br />2. Adult Colorado squawfish migrate long distances to spawn .we 41'\ <br />. .fa~_ _ 1 . ~ limited reaches that provide suitable spawning <br />habitat. To obstruct these spawning migration routes would <br />result in a reduction in reproduction. <br /> <br />17 <br />
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