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

Westwater Canyon Humpback Chub Length-Frequency Distribution
1948
n=489

so -r._,... _
40
e
v
~ 30
c
a 20
L
~" 10
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
l~ 01 M Vl l~ fT M V1 l~ Q1 M V1 l~ Q~ M V1
^~ "" ^~ ^~ ^~ N N N N N M M M M M [t of R
Length (mm)
Westwater Canyon Humpback Chub Length-Frequency Distribution
1999
n=270

50 ~-_ __--_- ___.___.__. _ -_ _ _ .___ _ _ - _ __ _ ~ ._.._ __ ___ _ _
,~ 40 _ ._ _ _ _ _ _ _ _ _ ,_ . - ~
A
C
d
20-r _ _ _ -_ _ - _ 1
__ _ -
w 10 -~ _ - _ . - -- - _ ~
I
o -~----- , , , , {
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[~ O~ M V1 [~ 01 M N [~ 01 M ~ l~ Q~ M Vl
^^ ~--~ ~-" ~--~ r+ N N N N N M M M M M V-..i 7 7
Length (mm)
Westwater Canyon Humpback Chub Length-Frequency Distribution
2000
n=266
50 - -_~_ ________ _ __~ ,.--- . _ _ _~ _._ _ _ .__ . _
40 - _ _.-_ __ - 1
c -
30 - - _ _ _ _ _ - - - _ __ - _. -- _ , _:
C
v~ 20 .. _. _ _ _ _ _. - _ . _. _ _. .-_ . _ _ _ _ -_
i
w 10 - - ~ -- __ __- --- _ _. _ __
I
0
0 0 0 0 0 0 0 _0 0 0 0 0 _0 0 0 0 0 0 0 0
l~ O~ M Vl l~ 01 M V1 l~ U M Vl l~ O~ M V1
^" ~ ~--~ ~--~ -+ N N N N N M M M M M 7 7 d'
Length (mm)
~ Figure 3. Westwater Canyon humpback chub length-frequency histograms for 1998-2000.
Frequency is illustrated as number of total individuals within a given size class.
~ 20