7144

• UCREFRP Catalog Number: 7144
• Author: Inslee, T. D.
• Title: Spawning and Hatching of the Razorback Sucker
• USFW Year: 1982
• USFW - Doc Type: Western Association of Fish & Game Agencies
• Copyright Material: NO

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and Keretella) (Table 7). Phytoplankton included a few filamentous
and colonial forms of green and blue-green algae and a large number of
diatoms (Table 7). So few zooplankton were found that their presence
was occasional at best and no population trend could be distinguished.
Phytoplankton mean numbers were low in April, May and June, but rose
sharply in July and August.
Periphyton biomass, expressed as ug/m2 of chlorophyll a, are
presented in Table 8, and they also show a low spring-high summer
trend. Species of periphyton were generally the same as those indi-
cated in Table 7 for phytoplankton.
No aquatic macrophytes were noted in the study area.

Discussion

Fishes
A comparison of Tables 1 and 2 indicates that our catch in 1979
was very similar to the catch of previous studies, with one notable
exception. The catch of 1536 Colorado squawfish in 1979 represents
the largest number reported in any recent study, including that of
Vanicek (1967), which covered three years and caught 1469 squawfish.
The Moon Lake study included two new distribution records for the
mountain sucker and mottled sculpin between Jensen and Ouray. Several
species that have been infrequently reported in the literature and were
not caught in 1979 were the Utah chub (Gila atraria), bony tail chub,
humpback chub, sand shiner (Notropis stramineus), black bullhead, and
largemouth bass.