9531

• UCREFRP Catalog Number: 9531
• Author: Hudson, J. M. and J. A. Jackson.
• Title: Populaiton Estimates for Humpback Chub ‎(Gila cypha)‎ and Roundtail Chub ‎(gila robusta)‎ in Westwater Canyon, Colorado River, Utah, 1998-2000.
• USFW Year: 2003.
• USFW - Doc Type: Salt Lake City.
• Copyright Material: NO

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Westwater Canyon Roundtail Chub Length-Frequency Distribution 1998
n=390
80 -~ ___ _ ~ __ .~ _.,..~. _ .._~. __._._.._ , . -. ~ _ . - -- ~ ~ w
70 -~ _
,., 60 ~ _ _
a, 50 ~ _
u
40 -~ _ _
d 30 -~ _ __ -. - _
w 20 -I - _ _ !
10 -~ _ .._
0 T--- -_..-. ~ ~ ~ ~ ~~ ,- ~_ -.
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
l~ 01 M .!1 l~ O~ M +n [~ O~ M ~ 1~ 01 M h
^~ ^ ^'" ^ ^ N N N N N M M M M M ~ ~ V
Length (mm)
Westwater Canyon Roundtad Chub Length-Frequency Distribution 1999
n=469

80 ._ ~ __. ~. ~_ __ _ _ ~__ - - _ --__.
70 _ _ _ _ _.
,.~ 60 - - _ _. _ _ _ _ _
e _
~ 50 _ _ _ - _- -- _ _ -- -
U i
~ 40 _ .. ._ _ _.: _ _ ,_: ..
~ i
30 - _ _ _ _
w 20 ~ -~ - - - __ _ _ _ _ _ _ i
10 __ _ ._
0 ` . ,~ ,
0 0 0 0 0 0 0 0 0 0 0 pp o 0 0 0 0 0 0 0
l~ O~ M Vl n 01 M V'1 l~ 01 M V1 l~ O~ M l!1
~--~ ^-~ ^~ ^+ ^~ N N N N N M M M M M ~ !Y 7
Length (mm)
Westwater Canyon Roundtail Chnb Length-Frequency Distribution 2000
n=511
80 -_-__-..._....__.__ ~.,.-~..-.-............_.~._.....-. ~..-.-~ ..._~.....~...~
70 - _._ __ _ _, _
~, 60 - _ __ _ __ ._. _ _.,_ _ _ ,_._ _
~ 50 - _ ~ ._ _ _. _ _ _ _ __.. +
~ _
40 ~ - - _ ~_ ._ _ _- . _ _ ,_ _,
30 - - - _ _ _ - - - _
10 ~
0
0 0 0 0 0 0 0 0 0 0 0 0 _0 0 0 0 0 0 0 0
l~ O~ M V1 [~ ~ M h n O1 M Vl n Oi M V'1
^~ ^~ ^~ ^-~ ~ N N N N N M M M M M It V R
Length (mm)
~ Figure 9. Westwater Canyon roundtail chub length-frequency histograms for 1998-2000.
Frequency is illustrated as number of total individuals within a given size class.

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