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<br />Trouts He 01 nonhcrn dt'T1v.Hwn, J.nJ rhus Jll
<br />well In sudl plJces. He:.J.Jw.Hl"f ~lrt',lms ..Lbo\'(,-
<br />pefh.lps 2100 m .il lower I.J.tHUJt'~ In ~lt}dcU art'
<br />J.lso hl!!h .lnJ ltlol enou~h to surpun trouts, hut
<br />they :.J.Te nm [00 hl!"h or cold to t'xclude a.-mpt-rate
<br />Spt'Clt'S Thus. J. far mOfe Jllt:rsltlt'd laun..L is pft'~ent
<br />l)n Mtx\cJ.n mOUnt.llntops_
<br />,\lOS[ hlt!:h-:dtJruJe. perenmal 'iouthwt'stl'rn ~tre<lm~
<br />dept'nd un ~rnund 'iwr<l8e III melred sno\\ tor
<br />sust.Hned tluw dUfln~ drou~hc. ~t'\'t'rt' JrYln~ (J.n
<br />Induce Intermlttemy, With pooh malnt.unt'J by
<br />undt"r,!.:rounJ wep.l,!.:e. Alu:rnarL\e1y. hllUTln,l.: tluods
<br />may oc(ur .H snowmeh. e~rCU;J[Jy when W:.J.Tm rains
<br />tall on ;\n .lccumul.ut:J snowp.lck or ,lftt'r llOlt.nt
<br />CllnH,'UlOnJ.l stl)rms In summer In theIr n.nural
<br />StJ.H,'. hOll'n'cr. b.lnks u( mountJ.1n lrn,ks ,He
<br />protect cd by dt'nsc' flp.IT!,ln forests. Tllt'lf ch.wneJs
<br />.Ht' chokt'd \Inh J,)wnt'J Ill,!.:S and uther ort::.IOIC
<br />debriS .Ind lint'd with .lfmnuflng III cobbles .lOd
<br />bouIJ('rs. ~o the tru~l\'(' power III IloLlds IS
<br />mlmmlleJ.
<br />1/1 falt. most mountain strC,lms m,lr he SLl heal-IIy
<br />shadt'd by trt'h rh.t.[ ft'w .1<4U.l(ll plJ.nts lJ.n ~ruv.
<br />Low lL~ht Intt'nslt) lmpt'des pho({)s~,nthtsls. ;Ind
<br />colOOlzallLln by all bur 'ipt'CJJ.iJy J.~bpred .il}.:,\{' I~
<br />prr:c1udr:d. Rc'achr:~ expost'd to sunJJ~ht In mt'.IJows
<br />mppon tlourl~hlng JquarK ,lnd ~t'ml,lquatll rlJ.nt
<br />communirlt's. which mJ.~' tlll lhe lh.lnnel tll lorm
<br />lomplt'x mJ.[sht:~, CUnsiJt'rJ.ble or,f:,lnJc m.HeriJ.I ma~'
<br />he ProdUlt'J In such sc'uwns
<br />~losr mounUln Stre,lms ,Irt' nllnt:dlekss
<br />hererorropluc. wllh nr,L:JOI( Input (omln~ from the
<br />w.Hc'rsheJ rJ.th('r rlun prllduced within rht: .lljU.lfH;
<br />syStl"m. Pine needles. k,l\'es, J.nJ woody debriS are
<br />J.lfJ.ckt:d hy lucftrl.1 <lnd funp w form dt~lTlrus.
<br />.....hll:h St'rn:s J.S tht' food h.lst'. Im't'nebures capJ.ble
<br />of shredding leans. others th,\[ ~.lther J.od c.1l findy
<br />
<br />dl\'lded ort!:Mlic debrIS. .Jnd some thJt feed on
<br />Je(umposin.o: wood .lTt. (ommun. These Jnimals He
<br />t'J.ten. 10 rum, by prt'dafory In\'CrtebrJres .lnd llshes,
<br />
<br />High Mountain Trouts
<br />
<br />;-';,Hlve trour of tht S<JUthwt"sr (<In only br: rellers
<br />of rhe I'Jsr rhat .h:hlt'lr:d tht'lr prc~tnt dlsrTlbutlons
<br />1.'"ltht'r br t'ntt'rln,C lhe f1n.-rs from .1 much cooler st'a
<br /><)[ b~' rht' fJr mort. difficult process of dlspt:rsJI over
<br />Jr;\I~J.,Ce dl\'ldt's Twu enJt'ml( speCJes He is\llated
<br />In hl~hbnd~ ul ArLwnJ. ,In..! Xn'" .\It'XICO. l)ne or
<br />mon" unde~(ribt.d kinds (colk-((J\"t.-ly (ailed ["MA" .If
<br />)':J'flll. hgs. 10. I I) live In the rugged SlerLI .\bdre
<br />01 SunorJ. and ChlhuJ.huJ.. rhe ,\lexic.ln t:oldt'n
<br />trl)utl/,.",./"I J"rJdd lIIt.ll<.md b\.es 10 Sin"loJ., J.nJ ,I
<br />nati\'e SUh~pl'(ll'S l)f rJ.inbov. [rl)UI u,."d'J .It S.l/1
<br />Ptdrri ,\Ll"!!") IIlt"s \)n WI' l)f SlerrJ. SJ.n Pr:dro ~tarlir
<br />In B.I)il CJ.hfornl<l :\.'ortc. Tht' 1.lSt two kinds He Out
<br />01 the .Hea l)f prest"nt (0\'t'r3)o:e
<br />In tbt, l'nlted StJtt's, rhe Apacht' rTOur lFi,e, 11) is
<br />natl\'e to tht, \\'hl[t' ~lnuntJ.lns of AnIona. in
<br />he.ldwiJ,rers of lht" Lutle CI)!or,IJll. Black, .lnd \'X'hl({'
<br />nVer~. GiLl trour (Fi~. I,) once b\.cd in rrihU[uies
<br /><)f the Verde River. Anzon.l. from which natur<ll
<br />populations h'll'C lon.~ bet'n ("xtLrpatcJ. It persls[s
<br />"'\turally only In [nhUtMleS of lhe upper Gda River.
<br />;-';('w .\Iexl(o. BI\lh (l1Tmt:rl~' r .\Ogl'J dl)\~'nslopr: IOta
<br />J.lrp:t'r strc'.\ms
<br />Bmh rhe ApJ.che .lnd Gda trOUtS bt'lJ.me
<br />lfl,reaslfl~ly [,'stncteJ JO rangt' J.nJ numhcrs as non-
<br />natl\"l' species Wl'TC Introduced to c.-nh;\ncj; spon
<br />fishmg_ Each progr(-ssl\'e!y disappeared J.S aben tlshes
<br />neCotmt. estJbhshed and Increased In Jbundance,
<br />RJJOb\)w tand likely cutthroat) trout hyhridized with
<br />rhl'm. brown trout J.te them, .J.nd brllok troU[
<br />
<br />
<br />Figure 10 YaquI
<br />IrouUtrucha de
<br />YaQui, 13,5 em
<br />In lotal length, a
<br />yet-fa-be.
<br />descnbed
<br />species Irom
<br />Arroyo Ahumada,
<br />Chihuahua
<br />
<br />7
<br />
<br />010S6
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