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Last modified
7/14/2009 5:02:31 PM
Creation date
5/20/2009 10:22:15 AM
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UCREFRP
UCREFRP Catalog Number
7835
Author
Osmundson, D. B., et al.
Title
Studies Of Colorado Squawfish In The Upper Colorado River, Final Reports.
USFW Year
1997.
USFW - Doc Type
Recovery Implementation Program, Project No. 14,
Copyright Material
NO
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.-. <br />E <br />E <br />2 <br />Z <br />W <br />J <br />J <br />Q <br />O <br />I- <br />1000 <br />900 <br />800 <br />700 <br />600 <br />500 <br />400 <br />300 <br />200 <br />100 <br />1000 <br />900 <br />800 <br />700 <br />600 <br />500 <br />400 <br />300 <br />200 <br />1100 <br />1000 <br />900 <br />800 <br />700 <br />600 <br />500 <br />400 <br />300 <br />200 <br />---------------- ----- ---------- •----------- . ................................... ...........---- ... <br />A....... .................7..............-T........-•------ ----•--------° ; .. •-•-- <br />: 1 i <br />..i.. <br />s 1. ................ / .......i. .. . ............ ...---- ...._..•. ..----.....- <br />................a... .......-.... + ........... i..... ....... <br />.............. ..M........ ?4 --.-.-.....-4............ ._-...........f............... <br />.... <br />................ ................ =................. ................ <br />............ •............... ........ ------- `................ ------------ -----•----- <br />---------------- --------------- - <br />_f <br />0 5 10 15 20 25 30 35 40 45 50 55 <br />AGE (YEARS) <br />Figure 3. Estimated mean length by age for Colorado squawfish in the Colorado River. (A) <br />Lengths calculated by four methods (see Tables 1 and 2). Bars represent +/- 1 standard error. <br />For ages where lengths were calculated by adding mean growth increments to mean lengths of <br />the preceding age ages 8-55), standard errors were calculated assuming a linear combination <br />of mean growth increments. Additional lines are growth curves reported by other researchers: <br />solid: Seethaler (1978) for Colorado River; dotted: Hawkins (1992) for Colorado River; <br />dashed: Hawkins (1992) for four rivers combined. (B) Lengths from Monte Carlo simulations <br />using size-specific growth rates as shown in Tables 1 and 2. (C) Lengths from Monte Carlo <br />simulations assuming constant growth for fish z 550 mm TL (see Table 2). Bars in (C) and <br />(B) represent the lengths of 95% of fish for each age. <br />A-10
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