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Last modified
7/14/2009 5:01:44 PM
Creation date
5/22/2009 12:24:50 PM
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UCREFRP
UCREFRP Catalog Number
7116
Author
Baxter, G. and J. Simon
Title
Editor
USFW Year
Series
USFW - Doc Type
1970
Copyright Material
YES
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<br /> <br />. , <br />. <br /> <br /> <br /> <br />Thecstablishmcnt of the sand shiner and the plains killifish in Ocean Lake, <br />and the presence of the longnose dace in Hams Fork near Kemmerer are also <br />probably attributable to thc use of live bait. <br />The carp and the yellow perch continue to increase in a number of habitats <br />wherc they have been established; the former has increased by virtue of its <br />fecundity and adaptability, the latter as a result of these same features together <br />with some assistance from apparently well-meaning persons who indiscriminantly <br />transplant the perch to establish a game species in some specific habitat. <br />The establishment of the sculpin, Cottus bairdi, into the Wind River drainage <br />is probably attributable to its use as a bait species. <br /> <br />foil <br />sun <br /> <br />Rare and Endangered Species: <br /> <br />On the basis of the recent survey the following species of fishes are considered <br />rare and endangered within the boundaries of the state, to the extent that special <br />considerations should be given to ensure their preservation: <br />Scaphirhynchus platorhynchus, shovelnose sturgeon. <br />Hiodon alosoides, goldeye. <br />Salmo clarki pleuriticus. Colorado River cutthroat trout. <br />Phoxinus neogaeus, finescale dace. <br />Semotilus margarita nachtriebi, northern pearl dace. <br />Hybopsis gelida, sturgeon chub. <br />Nocomis biguttatus, hornyhead chub. <br />Phenacobius mirabilis, suckermouth minnow. <br />Gila copei, leatherside chub. <br /> <br />Some additional species are still quite abundant in certain areas, but their <br />ranges have been clearly reduced in the past two decades, such that they should be <br />considered, if not actually rare, certainly in need of consideration from the point of <br />view of conservation and even preservation. These are: <br />Notropis comutus, common shiner. <br />Gila robusta, round tail chub. <br />Catostomus latipinnis, tlannelmouth sucker. <br />Catostomus disco bolus, bluehead sucker. <br /> <br />Hybrids and Hybridization <br /> <br />Hybrids are not uncommon among the fishes of Wyoming. Hybridization <br />between two species which occur together naturally and spawn in the same habitat 11,':; <br />may occur more or less accidentally. Hybridization may also result when one of <br />two species is quite rare and the other much more conunon. This may result when <br />ecological changes in a stream as from siltation or dewatering are causing one I <br />species to decrease and another to increase. (n Wyoming hybrids between the creek ; <br />chub and the common shiner in small streams in the North Platte System and those I <br />between the redside shiner and the speckled dace in streams in Jackson Hole are l <br />probably attributable to one or the other of these possible causes. <br />More commonly hybridization takes place when one of the parental species I <br />has been introduced, especially early in the history of its establishment when it is I' <br />quite rare. This phenomenon may explain hybrids between the rainbq~ and <br />cutthroat trouts in the Green, Snake, and Big Horn drainages, and between thc <br />white sucker and the tlannelmouth su~ker in the Little Snake Drainage. The <br /> <br />154 <br />
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