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<br />that limitrd arras in thr canyon were not treated, and "nil
<br />enbrrg (I 90S) found indidduals of (;ila abundant in the Ul': 'I'
<br />part of thr stream in the mid-19(iOs,
<br />Samples from tll(' Salt Ri\"er basin, upstream irom Roos(",
<br />Lake hl'long to G. r. rohus/a (fig. 0) except for fishrs from TlIll: ,
<br />('rel'k (discussed Iwlow), Specimens from the extrem(' Uppl'r re:l. I"
<br />of the IIlack Ri\"er are slightly thicker IJlIdil':! th:1II those dll'.':
<br />stream, and thi,; also may b(' noted in sr,'eral oi thl' small,
<br />tributary populations. ] read('r bodi('d specimens are l'spl'ci;!!!..
<br />('\"iden tin Ca ri zzo ('rl'('k (fi.!.:. SF): hO\l'ewr, t h(' I ('ndl'ncy to\\;, 1', i
<br />thick lH'a "Y bod il's d, ll'S not approach the o\"l'ra II Illorphology "I
<br />G. r. grahallli.
<br />(,huhs imm TOlltll ('r('(.k (iig. ,",: I. a major trihutary IIi
<br />Salt Rin'r Ihat Ill'ad..; Ill';\r the easll'l'n margin oi the \'rrdl' Ri
<br />hasin, diift-r from Iltlll'r populations IIi the uppn Salt Ri\"rr. TIII'\
<br />resemhl(' iish iroll1 the E:\st \'l'rdl' I\i\'L'r in l'xtl'l'n:d appl'ar:llll'"
<br />(fig. SB), and ml'ristic i('almeS oi upstre:lIl1 populations (l'ni-
<br />wrsity oi ~Iichigan ~Iusl'um IIi Zoology 131102) arl' ,'ery simiLtr
<br />to (-;. r. grllll/ll/li. ~Il'ri-tics oi dO\l'n~lream PIlPuhtions reiL'1
<br />intergradatilm \\'ith C;itll rohus/a roll/lIla. Simihrity oi thl' p' I).
<br />uhtillns in tIll' upper portions oi Tonto ('n>l'k and thosl' of lh.
<br />East \'erdl' Rin'r m:\y he exphi Iwd hy l'I'n'nt .g('lllogical e,'idenc.,.
<br />hasin iill oi the sam,' lIri.gin and agl' comhin,'d with th(' natllr,'
<br />oi ,_lream gra,'el d('po~ils are iirm l,,'id,'nn' illr a prl'\"illus Ctlll-
<br />lH'rtion oi llH'se ad.ian.nl taltlll11lgh presently sl'parall'd wilh allllll':
<br />completdy ;IPllosed i(.I\\' patterns) stream channels (('rdrrson an.:
<br />Royse, 19iO).
<br />In Fish and ('an' ITl'l'ks that enll'l' th,' S;dl Rin'r dO\l'lblr(';lll1
<br />from ils major cany"n. till' chuhs hl'long to C;. il/lalllolill.
<br />~lalerial irom thl' Ill'adl\'at('rs of th(. S:1Il Pedn, Ri"l'r present",1
<br />no prolJlclll oi interpretation. I t is identicil 10 C;, il/lc/'Il/olic1 il'l "
<br />the adjan'llt S:lIlt:\ ('rllz (\I'hell ~rllnkey Springs is l'xcluded).
<br />art' Ii extallt "pecillll'nS irolll till' l'xtrellle uppl'r San ~il1l111l I\i\,
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