9627

• UCREFRP Catalog Number: 9627
• Author: Mueller, G. A.
• Title: Ecology of Bonytail and Razorback Sucker and the Role of Off-Channel Habitats in Their Recovery.
• USFW Year: 2006.
• USFW - Doc Type: \
• Copyright Material: NO

Contents vii

50. A group of spawning razorback suckers ................................................................................................31
51. Razorback sucker larvae are phototactic ..............................................................................................32
52. Organisms attracted and captured in a light trap ...........................................................................33
53. Photograph showing a spawning razorback sucker resting on the bottom of Cibola High

Levee Pond .... .... .... .... ...... .... .... .... .... .... ........ ........ .... .... ............ .......... ... ...... .... .... .... ............ .... .... .34

54. A frame grab of the same fish exhibiting the "blinking" phenomenon .......................................34
55. General map of the locaton of Cibola National Wildlife Refuge and Cibola High Levee Pond ....36
56. Cibola High Levee Pond taken from the high levee looking north to the river levee .....................37
57. Bathometry map of Cibola High Levee Pond taken during seasonally high flows.........................38
58. Map showing the composition of bottom material at Cibola High Levee Pond .............................39
59. Aquatic plant growth during the summer dominates much of the pond's volume and area .......40
60. Photograph (taken 15 August 1933) of the Colorado Delta region .....................................................40
61. Mean weekly die I temperature range of surface waters at Cibola High Levee Pond ..................40
62. Surface conductance (IJS/cm) taken at Cibola High Levee Pond......................................................40
63. Seasonal winter-through-summer cycle of the major zooplankton groups found in Cibola High

Levee Pond ....................................... ....................... ...... ............. ............ ...... ........................ ..............40

64. Composition of the fish community at Cibola High Levee Pond .........................................................41
65. Size distribution of bonytail (n = 1,440) and razorback sucker (n = 800) ...........................................41
66. Size distribution of all bonytail captured in Cibola High Levee Pond ................................................41
67. Multiple year classes (possibly four) of bonytail captured in Cibola High Levee Pond ................42
68. Map of Cibola High Levee Pond showing the primary and secondary locations where bonytail
were observed exhibiting spawning behavior or their eggs were found .............................43
69. Growth rates of bonytail (n = 31) taken from Cibola High Levee Pond based on 50-mm size

g rou ps ... ................................. ...... .............................. ..... ....... ..... ....... ..... ....... .................. ...... ..............44

70. The percentage of bonytail females versus males larger than 350 cm taken from Cibola High

Levee Pond ..... ............................... ...... ..... ................... ...... ........... ........................................... ...........44

71. Map of Cibola High Levee Pond showing areas of cover used by large (>30 cm) bonytail and

sma lie r (<20 c m) bonyta il ............................. ................................................ ..... ..............................45

72. Size distribution of razorback suckers captured in Cibola High Levee Pond ..................................46
73. Multiple year classes (possibly four) of razorback sucker captured from Cibola High Levee

Pond .. .............................. .... ...................................................... ........... ....... ............ ..... .................. ......46

74. Map of Cibola High Levee Pond showing the primary and secondary locations where
razorback sucker were observed exhibiting spawning behavior ...........................................47
75. Growth rates of razorback suckers In = 86) taken from CHLP based on 25-mm-size groups .....48
76. The percentage of females versus males for razorback sucker larger than 450 cm ....................48
77. Photograph showing the stomach contents of a channel catfish.....................................................48
78. Photograph of largemouth bass capture from Cibola High Levee Pond ..........................................48
79. A large bonytail taken from Cibola High Levee Pond exhibiting a large healed wound ...............49
80. Yuma Cove is located on Lake Mohave (Arizona-Nevada).................................................................50
81. Rock Tank is located on the Buenos Aires National Wildlife Refuge in southern Arizona ..........51
82. Landscape illustration (surface, top down) of a native fish sanctuary designed to mimic
features found at Cibola High Levee Pond .............................................................................54
83. Landscape illustration (side view) of a native fish sanctuary designed to mimic features
found at Cibola High Levee Pond .............................................................................................54