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<br />"Ullivers.i t)' of Nel~ Haxico for aceurate identi fica tion.
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<br />A total of 14 dIfferent species were collected from the San Jusn ond Pine
<br />Rivers. These species inoludo the flannelO1outh suckel', (Catn'toml1s lati.,inis), the
<br />l~h1te sucker, (!:,1tostonlUs co,"mp.rsoni), the blllehead sucket', (Panto<tp.l'S ~ilJJ.ts.),
<br />the speckled dace, (Rhlnichvthvs ~<cl111ls), the bonytaj,l "hub, (~rohust'1.), the
<br />Colol'ado Rive" squQ,wfish, (Ptychocheilus. 11'Cill'), the mottled sculpin, (Coctus
<br />.'QAu.4i) , the brown trout, (~ trlltt~), the carp, (Cypri"", $;arp10), the fathc.ad
<br />,"innol~, (PimDh€llp.s ~ili.::i.), the channel cntfish, (Tctnlllrlls pllnctn~'ls), the black
<br />bullhead, (Ictalurus ~), the bluegill, (~pomi.s. mnchrllchlrll') ,:lnd the green sun-
<br />fish, (LeDo01is cyanellus).
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<br />The flannelmouth sucker and the bony tail chub !-'ere the most abundant species,
<br />nearly onn.half of the tot81 number of fish found. Only four brown trout were found
<br />in the 5,1n JU,:ln and Pine Rivers.
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<br />The fish species found in the Navajo River wet'e the SBr:le DB those found in
<br />the San Juan and Pine Rivers, rainbow trout, (~ VairnDerii), was the only additional
<br />species found. Trash fish werQ the JQost dominant species, howeve,', the ra,1nbow and
<br />brown tl'out ~lere more abundant than trout found in the San Ju8n /lnd Pine Rivers,
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<br />The t'otenone tre.1tment 1~8S very successful. Good results, nearly tots.! kill,
<br />l~aS obtained dOtmstream to k'l'uHland, New Hoxico, approximately 40 miles below the
<br />Navajo Dam. This made s. total of approximately 75 miles of the San Juan River that
<br />was, trea,tecl.
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<br />As yet, no watel' has been impounded by the Navajo Dam and the pt'osent anticipated
<br />closure will be sometime during the spring of 1962. 'fhis will be approximately eight
<br />months after tho l'otElnoning. The nllmber of fish moving into the treated a.ros./l of the
<br />San Juan and Pine Rivers is not known at the present time.
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<br />Fig. 3. A typical sDmple of the San JU8l\ River
<br />fish population.
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<br />Fig. 4. llonytail chub collected from Siln
<br />Juan River.
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<br />F.19-D.4, Job No. C-16-4
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