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Last modified
7/14/2009 5:02:32 PM
Creation date
6/1/2009 11:28:31 AM
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UCREFRP
UCREFRP Catalog Number
8002
Author
Bozek, M. A., L. J. Paulson and J. E. Deacon.
Title
Factors Affecting Reproductive Success of Bontytail Chubs and Razorback Suckers in Lake Mohave.
USFW Year
1984.
USFW - Doc Type
Technical Report No. 12,
Copyright Material
NO
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18 ' <br />Tequila Cove (below Cottonwood Landing), and in Great West Cove, near <br />Eldorado Canyon. These areas were all locations where razorback sucker <br />spawning activity was observed during sampling. Razorback sucker catch <br />rates were low in other areas of the reservoir netted, but still <br />comprised a large percentage of the total catch. Carp were usually the <br />second-most abundant fish species in the catch during winter, followed <br />by channel catfish, largemouth bass, and rainbow trout (Appendix 3). A <br />few cutthroat trout (Salmo clarki), and striped bass (Morone saxatilis) <br />were also captured in trammel netting. Only eight bonytail chubs were <br />caught during the study. These were all captured in the Six Mile Coves <br />area during March and April, 1982. <br />The catch rates for razorback suckers in Arizona Bay were fairly <br />constant during winter of 1982 and exceeded that of any other species <br />present (Fig. 3). The area was not netted in April, but observations <br />indicated that while spawning was still fairly intense, it had begun to <br />decline, and carp were becoming more abundant. The catch rates for <br />razorback suckers declined in May, and carp became the dominant species <br />in the Arizona Bay area. The catch rates for other species also <br />increased'at this time. <br />The February 1982 catch rate for razorback suckers in the Six Mile <br />Coves area appears high in comparison to other months of the spawning <br />season during that year (Fig. 4). Catch rates were inversely <br />proportional to net hours which largely accounts for the differences <br />among these months (Appendix 2). Nets generally were set at dusk when <br />razorback activity was high, yielding high catch rates when calculated <br />on a 24 hour basis and compared to other sites. Overall, spawning <br />densities were similar in both the Six Mile Coves area and the Arizona
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