8142

• UCREFRP Catalog Number: 8142
• Author: Horn, M. J.
• Title: Nutritional Limitation of Recruitment in the Razorback Sucker ‎(
• USFW Year: 1996.
• Copyright Material: NO

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LIST OF FIGURES

Page
Figure 1. Location map of the Colorado River drainage and its major tributaries. ... 30

Figure 2 a-b. Pre and Post-dam discharge patterns for the Colorado River at Lee's Ferry.

a. Annual peak discharge 1922-1962; b. Annual pattern of discharge for pre-

dam period 1922-1962 and post-dam 1965-1992. . . . . . . . . . . . . . . . . . . . . . .. 31

Figure 3. Location map of Lake Mohave and Yuma Cove with identification of

collecting sites for larval razorback suckers. ... . . . . . . . . . . . . . . . . . . . . . . .. 32

Figure 4. Comparison of basic limnological data (temperature, dissolved oxygen,

conductivity) between Yuma Cove backwater and adjacent Arizona Bay, Lake

Mohave,Puizona-l'levada. ........................................ 33

Figure 5. Average springtime abundance of major zooplankton groups (cladocerans,

copepods, and rotifers) for 1992 for the Yuma Cove backwater. ........... 34

Figure 6. Average springtime abundance of major zooplankton groups (cladocerans,

copepods, and rotifers) for 1992 for Puizona Bay, Lake Mohave. .......... 35

Figure 7 a-b. Size and shape comparison of sagitta and lapilli from early stage

razorback suckers: a. 8 d old larva, sagitta on left magnification 250X; b. Sagitta

and lappilus, saggitae on right, from 3 week old larva, with sagittae beginning to

elongate, magnification 160X. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 53

Figure 8. Estimated age (increment counts) plotted as a function of known age for Ad

libitum razorback sucker larvae. .................................... 54

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