7625

• UCREFRP Catalog Number: 7625
• Author: Stone, R. C., L. Fields and K. Miller.
• Title: Lake Powell Post Impoundment Investigations.
• USFW Year: 1964.
• USFW - Doc Type: Progress Report No. 2,
• Copyright Material: NO

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upper and lmler reservoir groups :?nd three le:1gth groups: 0-230:;-,~, 231-

324r::!":'., 5.",cl 325 and lcmg'~r total le;^.cUl. Table 7 also preser:~s t::e l'es'.ll'~s

cf all Groups cOr.1bined. A line across the reservoir' about at Las:' Char:ce

Creek #as used to separate the upper and lower reservoir groups.

In all groups fish ,'iere the predo~:Jinate food itc);;s, cO:ltributi:l_S 90.5

percer"t of'.occurrence and 92.8 percent of numbers in the ccmoined sa:-::ple.

1:1 all of the other analysis groups, except those fish lo:,.ger than 325::11:1

total length, food items r.1ade up about 92 percen~ of both occurrence and

numbers. In the lensth group over 325:;;r.l tl-:.e perce:1t2.gcG "'ere 3~. .'~; of

occurrer.ce and 86.6 of nilmbers. A sample size of only 12 fisi1 in thi.3 {;TO'Jp

::lay acccun't for the lower percentages. Fish were st,.ill the only signir!..ca!,~

food Hel:1.

Fish "were tal<:en in the folloi.;ing order by the bass examined: grE::e:l.

sur.fish, largemouth bass, carp, channel catfish, ga::Jbusia} plains red shiLer,

and dace.

Green sunfish ,.,rere the outstanding fish species taken by the 1.JilSS.

In the lower reservoir group, gree~ sunilsn amounted to 72.1 percen~ of

"'::::::t::-:-e:1c:e and 74.8 perce:1t of nu:;:bcrs. Carp ,,'ere the only ot.~H=r f!..sh tuke~,

vi ,,;,~S .;x'oup. In the upper reservGir, green sunfish ar-d. carp eacl-'. accou:::.ed

for 18.1 percent of occurrer:ce; and 11.6 ar.d 6.6 percent of m:r.1Cel'S,

respecth-ely. In tl,e length groups J green sunfish ',,'ere also the :::os'.:

prevalent fish ta:~en. Tile fish abc're 325mm took, exclusively, green sU:-:J:.'iSt1

arid carp. The smallest lenGth gr011p exhibited more latitude, Hit:1 0::</

carp not ceing found in ti..e stor.13,chs. In the :Jliddle lenGth group J C;:-(>:<:.

su"fish and cQrp ranked first and second as food items, \lith plai::s red

shiner and dace no~ being taken.

Insects and anr.elids ",;ere Lhe c:11y other food. i'te:ns fOl.l:'.d i(l ~:,~ bass

sto~achs. Insects contributed 3.7 percent of occurrence and 3.5 ~er2en: of

nw:.bers in the combir:ed s:J.mple. i\rmelids a:no'..lnt.ed to l.9 percer:.;: ccc:"irre:1~'e