7908

• UCREFRP Catalog Number: 7908
• Author: Valdez, R. A. and R. J. Ryel.
• Title: Life History and Ecology of the Humpback Chub ‎(
• USFW Year: 1995.
• Copyright Material: NO

xiv . List of Figures

Fig. 7-3.
Fig. 7-4.

Fig. 7-5.

Fig. 7-6.

Fig. 7-7.

Fig. 7-8.
Fig. 7-9.

Fig. 7-10.
Fig. 7-11.

Fig. 7-12.
Fig. 7-13.

Fig. 7-14.

Fig. 7-15.
Fig. 7-16.
Fig. 7-17.

Fig. 7-18.

Fig. 8-1.
Fig. 8-2.
Fig. 8-3.

Fig. 8-4.

Fig. 8-5.
Fig. 8-6.

Final Report

Surface flow pattern of an eddy (adopted from Rubin et al. 1990). . . . . . . . . . . . . . . . . . . . . . 7-6
Locations of five bathymetry map sites (A-E) and seven macrohabitat map sites (1-7)
on the Colorado River in Grand Canyon ................................... . . . . . . . 7-8
Length-frequency distribution of humpback chub captured in shoreline habitats (with
electrofishing, seines, minnow traps) and in offshore habitats (with gill nets, trammel
nets) for 1991-93. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Channel width to depth ratio compared to cumulative numbers of juvenile and adult
humpback chub captured in the mainstem Colorado River from Lees Ferry (RM 0.0)
to Diamond Creek (RM 226.0), October 1990-November 1993. Subreaches occupied
by the nine humpback chub aggregations are indicated. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
Number of adult humpback chub captured (AHB), debris fans (OF), slope, and width
to depth ratio (W:O) for three 8.4-mi subreaches of the Colorado River: RM 57-65.4,
LCR Inflow Aggregation (A), RM 122-130.4, Middle Granite Gorge Aggregation (B),
RM 140-148.4, no aggregations (C). . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . 7-12
Cumulative surface area of eddies and numbers of adult humpback chub captured
from RM 61.4 (LCR Inflow) to RM 76.4 (Hance Rapid). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13
Bathymetric maps of the Colorado River channel at Awatubi Canyon (RM 58.5) (A),
60-Mile Canyon (RM 60.1) (B), ESPN Rock (RM 60.8) (C), and Carbon Creek (RM

64.7) (D) .................................................................. 7-15
Velocity isopleths for the Colorado River at ESPN Rock (RM 60.8) (A) and Carbon
Creek (RM 64.7) (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17
Location of radio-tagged adult humpback chub near Awatubi Canyon (RM 58.5) (A),
6O-Mile Canyon (RM 60.1) (B), ESPN Rock (RM 60.8) (C), and near Carbon Creek
(RM 64.7) (D), 1991-92 ...................................................,.. 7-18
Distribution of substrate types in the LCR inflow, May 15-17, 1993. ................... 7-20
Locations of radio-tagged adult humpback chub near the LCR inflow (RM 61.3) in
February-May, 1991 (A) and 1992 (B). Points represent radio contact locations
occupied for 15 min or more at various flows .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22
Longitudinal distribution of subadult humpback chub, as hypothetical distribution from
a spawning outlet (A), as geometric mean CPE (no. fish/10 hr) by 1-mile strata from
the LCR (RM 61.3) to Hance Rapid (RM 76.5) for July-November 1993 (B),and
November 1990-November 1993 (C). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23
Densities of subadult humpback chub from electroshocking catch rates for six
shoreline types, November 1990-November 1993 . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .7-24
Percentage of shoreline types by river mile from the LCR inflow (RM 61.4) to Hance

Rapid (RM 76.4). ........................................................... 7-25
Densities of subadult humpback chub from electroshocking catch rates (GMCPE
#fish/10 hr), in subreaches 1, 2, 3, for all sample trips (A), November 1990-June
1993 (B), July-November 1993 (C), and July 1994 (D). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26
Average depth (A) and velocity (8) at three distances from shore (0.5, 1.5, and 2.5 m)
for six shoreline types in Subreach 1 (RM 61.4-65.4) and Subreach 2 (RM 65.4-73.4)

.......................................................................... 7-27
Approximate receMng zones for three remote telemetry stations near the confluence
of the Little Colorado River . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Primary abdominal incision along the midline (A) or lateral to the midline (B), and
external antennae (C) of implanted radio transmitter in adult humpback chub ........... 8-4
Schematic to define movement of radio-tagged fish as net (NO), gross (GO), and
mean (MO) displacement between contact sites. Contact sites are A, B, C, 0 and
distance between consecutive contact sites are a, b, c. Distance d is linear distance
from first to last contact ....................................................... 8-5
Location of radio-tagged adult humpback chubby triangulation and relationship to

river stage .................................................................. 8-6
Net (A), gross (B), and mean (C) displacement of 69 radio-tagged adult humpback
chub, November 1990-November 1992 ..........................................8-7
Locations of two radio-tagged adult humpback chub determined from telemetry
surveillance in Region 1, July 9-November 5, 1992 (A) and July 13-September 13,

1991 (B) ................................................................... 8-8