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On this and the preceding page are sleou,n
<br />three of the are fishes which arc found only
<br />in the Colorado Riser or certain of its tribr;-
<br />tories. Their continued existence has been
<br />seriously threatened by rit-er "rnanogen.,rnt
<br />that portion of the Green River-ma;or trib-
<br />utary of the Colorado-which was afeeted
<br />by the recent "trash-fish" poisoning program
<br />aBorded ideal habitat for maintenance of the
<br />three.
<br />This is a step in the right direction,are
<br />and it is hoped that these organizations t
<br />will also consult with the two com-
<br />mittees mentioned above that are ac-
<br />tively seeking information on threat
<br />ened cold-blooded vertebrates.
<br />Finally, the American fisherman and
<br />those charged with providing him with
<br />the relaxation that fishing brings are
<br />failing to take advantage of our rich
<br />heritage of native fishes. Many of
<br />these could well become eagerly sought
<br />?r by sportsmen. It seems ludicrous, for
<br />example, to condone the decimation of
<br />the Colorado squawfish for replace-
<br />ment by rainbow trout. The average
<br />size of the squawfish is larger than
<br />that of the rainbow, and with the pres-
<br />ent trend in fishing philosophy aitned
<br />toward the sport value of fishing for
<br />fun (rather than primarily for food or
<br />trophy) this particular native species,
<br />already fished for by those who know
<br />it.could provide hours of enjoyment.
<br />One devoted American son of Izaak
<br />Walton, Professor of English Marcus
<br />$eldon Goldman of the University of
<br />Illinois, has spent his fishing hours
<br />fishing for "species" and not for
<br />"trophies." He has found the challenge
<br />of taking small darters and tscu)pins on
<br />artificial flies to be far greater than
<br />that of seeking trout. Euro}e.ans are
<br />far ahead of us on this score,- carp and
<br />other minnows and other native kinds
<br />eagerly sought and eaten, or re-
<br />urned to the water. The number of
<br />fishermen increases tremendously
<br />yearly, and we cannot possibly hope to
<br />keep supplying these enthusiasts with
<br />what are now the only accepted game
<br />fish. Eventually, it is likely that we will
<br />find ourselves turning to native species.
<br />But if, in the interim, we kill off many
<br />or most of these potential native sport
<br />fish by chemical eradication and other
<br />methods, the fishery biologists of the
<br />future will look back on the activities
<br />of their predecessors as having been
<br />singularly short-sighted.
<br />References
<br />Almquist, Elisabeth
<br />1959. Observations on the effect of
<br />rotenone emulsives on fish food
<br />organisms. Institute of Fresh-
<br />water Research, Drottningholm,
<br />Sweden, Rept. No. 40, pp. 146-160.
<br />Anonymous
<br />1962. Mission accomplished. Good fish-
<br />ing ahead. <Tyoming fFildlif'e, Vol.
<br />26, No. 11, pp. 12.17, illus.
<br />Applegate, Vernon C., John H. Howe]!, and
<br />?Manning A. Smith
<br />1958. Use of menonitrophenols contain-
<br />ing halogens as selective sea lam-
<br />prey larvicides. Science, Vol. 12"4,
<br />No. 3294 (14 Feb.), pp. 336.338.
<br />Burdick, G. E., Howard 1. Dcan, and Earl 1.
<br />Harris
<br />1955. Toxicity of ernulsicable rotenone
<br />Photograph b. Rob,,i R. MR,,
<br />to various species of fish. New
<br />York Fish and Carte Jour., Vol.
<br />:2, No. 1, pp. 36-67, figs. 1-7.
<br />Kiser, R. W, John R. Donaldson, and Paul
<br />R. Olson
<br />1963. The effect of rotenone on zoo-
<br />plankton populations in fresh-
<br />water lakes. Trans. Amer, Fish.
<br />Soc., Vol. 92, No 1, pp. 17.24.
<br />figs. 1-3.
<br />Miller, Robert Rush
<br />1961. Man and the changing fish fauna
<br />of the American Southwest.
<br />Papers Michigan Acad. Sci., Arts,
<br />and Letters, Vol. 46, pp. 365.404.
<br />fig. 1.
<br />1963. Distribution, variation, and ecol-
<br />op of Lepidomeda vittata, a rare
<br />cyprinid fish endemic to eastern
<br />Arizona. Copeia, 1963, No. 1, pp.
<br />1-5, figs. 1-2.
<br />Regenthal, Albert
<br />1962 Treatment complete. Utah Fish
<br />and Game, Vol. 18, No. 11 (No-
<br />vember) pp. 3.5, illus.
<br />Sears. Paul B.
<br />1957. The ecology of man. Condon lec-
<br />tures. Oregon State System of
<br />Higher Education, Eugene, Ore.,
<br />1957, pp. 1-61, figs. 1-15.
<br />Stone, Rod
<br />1962 Tri-state treatment. Utah Fish
<br />and Come. Vol. 18, No. 9 (Sep-
<br />tember), pp. 1411, illus.
<br />Wvo. Came and Fish Dept.
<br />1962. For tf"yoming, a New Fishery.
<br />A 3-page mimeographed leaflet
<br />distributed at Jackson Hole, Wyo.,
<br />on Sept. 10, 1962, during the aa-
<br />nual meeting of the American
<br />Fisheries Society.
<br />MAY 1963
<br />The Colorado squawfish (Prychocheilas Lucius); a preserved
<br />specimen. From the Flaming Gorge of the Green River, 1961.
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