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<br />Figure 16 Beaver pond on the East Fork. althe little
<br />Colorado Alver, al Phelps Cabin, Anzona. This type of
<br />aquatic habitat must have Supported large numbers o!
<br />nallve IrouIS In limes past.
<br />
<br />Dlsappt'.HJnct" of bean:r .IS J result ll(
<br />o\'errrarrln~ m>lY .lIso han" ~t:'t."n J maloc (,((WT In
<br />babltaT deFf,ldatwll BeJn:r ronJ~ In [he \\'tmt"
<br />Mounr.lim ,!f ArlZuna {Fit:_ 161 now ~urrllrt J;tr,i.:t.
<br />numhers of .\piH;he tfOUr. ;":011... of rht"~c Ch,ll1,l.:l'S ha~
<br />heen (rmcall\' asst:sstJ. bur hJ,c.hn summer Winer
<br />rempcrJ.rurt's. ch.lnJ.'t'd Outflt"Dr rdiltwnslllps. .wJ
<br />lncrt:Hed turhiJl[V .Ind sediment rr.msrorr nu\' all
<br />he preJlueJ. ntln~ benefits native [rOUT, .
<br />RClO\'tTY efforts tor nan\"(. TrOUt In the l:niu.J
<br />St,HtS h.lVe n,lJ pubbc .InJ a.'-!r:llCy supporc becJuse
<br />of rht'lr pnsitlve Im.l.~t' .I~ g.lllle .\nJ food fishe\, chelr
<br />beaury, and the romantlUSlll wl[h which hl.'-!h
<br />mounT.llnS and thelf Srrt'dlllS .Irt. \'It'Wt,J The pbns
<br />.1ft. hJ.sically rn IS\llate and pwte(f selecceJ
<br />populatlons thil( represr:nr rhe phenor~-pt:"s (J.nd
<br />pn-sumably the t:"r:norypt....) In wddnm:...s or
<br />COlllp.lf.lble rellloTt: are,IS, and use h..H(ht'ry ~tr.llns
<br />for res[Ockln,j.: ntht'r 'irre,IIllS wlchlll th(- naC/v\, rant:es
<br />In chiS way. both spn.les may hI' mana!"t'd hH their
<br />continued sun-IvaI. .IS well ,IS for ust" by milll
<br />fiowever. the rrescn\e of non.n.I(I\'e species will
<br />conunue to be .I prublem, which m.IY prt)\t.
<br />IllSUrmOUllt,lbk' Future man.l~cml'o[ should exclude
<br />n(111-natJ\'(. croub from (ht' ran,l-:es ~)f n.lri\e 'f'r:t-Ih
<br />T\) my knowk'd,et,. n~1 spcClfil rro~ram hil!> yet
<br />been dt,\ e!opt.d for ll.ltl\'e (r{IUT COnH'T\,Hlllll Jll
<br />Chihu.lhua. Jnd ~llnor.l, other rhan (I) InclUSIOn 01
<br />nacur.ll r~lrlll.ltl\mS In the ~.Itlnll.ll P.lfks ,It EI ~Jlw
<br />Jt" Basast',lchlc. ~onora (Rw ~f.l~'ll dr.lI n.l,l:l'"l. Jnd
<br />S.lll Pedro ~Ltmr In Bala C.lbfofnl.l del :-';urte. .Ind
<br />(21 ~ener.ll rec\),lo:nltlon t)t the \J.lllt' of thl' unl..:jue
<br />:-'te,oc.lll crours In cht. Rw Fuerte hr:'IJ"'.Iters tt) the
<br />s\)urh, .Ind on ~Il'rr.l S.ln Pedro ~IHtlr
<br />
<br />Orher Spt'cics
<br />
<br />Only .I tt:v, W,lrmw<\((:[ fishes JSlend high r:nollgh
<br />to Imcr.lct on .1 J.ly-to-d"y hasls with trullrs III tht,
<br />unITed SUres. The spe(kled dan:1peftll(r, '1/(,/f",Jr, IS .In
<br />elo:Ct-pClOn. smu: they tommunly reproduce up co
<br />2100 III e1e\'arlOn SplneJ;J.ces In rhe Lmle COIIlUdo
<br />"nd Vlr~lll rl\"l"rs alsu occupy hl,L:h.e1t"V;UlOll habitat
<br />,dong with HOurS at rhe upper bmlts 01 chelr ran~t:s;
<br />thelT eculot-')' IS discussed bdow. Dr:sef( moumalll-
<br />sucker lIJ"r"/ltIt .Iff .Iejf,rl(, ,d"ll ,co intll headwaters.
<br />but It:w .He res IdeO[ thr:n:,
<br />In :\It'XICO, Lt"OP\lld suckers!m"",/,./f del B.ll'fJpt
<br />0\.::. I -'1 seem ch,uact{'rls(J( of hlgh,e1evaclOn croue
<br />waters. .IS IS Rw GLlnde mountJm.suckerlm..lu/li/t de!
<br />R,,, Br.ll'o IFi.c_ IHl In 1('0 Iimltt.J dlscrlbutlun (one
<br />srfl',lm known) In the Rio Y.{quI b;lSIll. Fn'e orhr:r
<br />kmds (set: below) rt:adl rht' urrt'r limn of ;duruJlnal
<br />distnbutwns sumewh.ll hdow rhe elo:trelllt'
<br />he.ldwarers. bur still OCtur broadly With natn'e trour.
<br />In one exam pit-. ,I trOUt III rbe Rio Papl,gochlC
<br />sub,baslll uf the )"lqUI basin lives In a srream
<br />
<br />
<br />Figure 17_ The Leopold suckerlmatalote del Bavispe IS listed
<br />as a speCies of special concern. The specImen illustrated IS
<br />11.0 cm :n tota! length, trom RIO Negro, Chihuahua
<br />
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<br />Figure 18 Aio Grande mountalll'Suckerlmatalote del Rro
<br />Bravo, 13.5 cm III tOlal length. Alo de las Vacas. New
<br />MeXICO. The red lateral band IS charactenstlc coloratIon for
<br />a fish III breeding condition ThiS species remains locally
<br />common In much of the upper Ala Grande baslll in the
<br />United States and MeXICO, and If} a number of independent
<br />drainages In the Sierra Madre OccIdental of Mexlco_
<br />
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