7012

• UCREFRP Catalog Number: 7012
• Author: Cross, J. N.
• Title: Ecological Distribution of the Fishes of the Virgin River ‎(Utah, Arizona, Nevada)‎.
• USFW Year: 1975.
• USFW - Doc Type: University of Nevada,
• Copyright Material: NO

iv
,LIST OF ILLUSTRATIONS.
Fi ure page
1. Location of the Virgin-River basin with respect to the
Colorado Riv er and surrounding geologic provinces••••••:•.•• 17
2. Long profile of the Virgin River••••••.•....•• .............. 23
3. Altitude map of the Virgin River basin ................. .... 25
4• Location of the sampling stations within the Virgin
River basin. ... ........ ................................... 40
5. Distribution of Salmo gairdneri, SaZmo cZarki and
SaZveZinus ;ontinaZis ....................................... 49
6. Distribution of Cyprircus carpio•...• ........................ 58
7. Distribution of Ri~irichthys oscuZus•••..• ................... 61
. 8• Distribution of Richardsoni~ts baZteatus hrgdrophlox
and IVotemigonus crz~soZeucas• .....:.......................... 73
9. Distribution of Gila robusta seminude ....................... 76
10. Distribution of Notropis Zutrensis••...• .................... 88
11. Distribution of Lepidameda moZZispinis moZZispinis.•........ 94
12. Distribution of PZagopterus argentissimus.......:........... 105
13. Distribution of Catostomus Zatipinnis.•.. .................... 116
14. Distribution of Pantosteus cZarki .............. ........... 128
15. Distribution of IctaZuras meZas and IctaZuras punctatus..... 136
16. Distribution of Gambusia affinis ...................:........ 140
17. Distribution of Mieropterus salmoides ....................... i43
18. Distribution of Chaenobryttus eyaneZZus ..................... i49
19. Distribution of Lepomis macrochirus .. ...................... 151
20. Longitudinal profile of conductivity, dissolved oxygen
and temperatu re and distribution of the fish fauna above
and below La Verkin Springs ............................ ... 158
21. Physically 'an d c hemicaliy modified stream reaches within
the Virgin Ri ver basin ...................................... 173