Laserfiche WebLink
<br />42 <br /> <br />qt Y111bU1tT was observed consistently greater than one toot. In III&J1Y <br />1natanoe., objeots were via1ble at depths ireater than thre. t.et. <br /> <br />Variations in tillh faunas <br />The fish faunas ot the two rivers wve tound to ditrer in <br />several respects. Three species or tish, the hwnpback sucker, h3br1d <br />sucker, and black bullbead were collected only f'rom the Green River. <br />Only two records ot the capture ot these fish from the tampa River are <br />known. Azevedo (1963) reported the capture of one humpback sucker in <br />the IUIp& River a tew yards trom its confluence with the Green River <br />in Eoho Park. Bailey and Alberti (1952) collected several black <br />bullhead. trom the Yampa River at the mouth or the Little Sn.ake River <br />in L1l1' Park. In both instances, these fish were colleoted near other <br />rivers. Gautin, et al. (1960) reported the mottled sculpin to be coDlllOn <br />in the upper Green R1 ver in Wyoming I however ,only a single specimen <br />was collected from the Green River Within Dinosaur National H:mument <br />during 1961 and 1962. Sevwal specimens were oaptured at CasU. Park <br />on the Yampa River. Another observed variation between the faunas ot <br />the t'WO rivers conoerned the bonytaU olmb. Although many individuals <br />were collected from the tampa River, the humpbaoked form was not found <br />amon& them. Emrironment, possibly, is an important faotor infiuenoing <br />nuohal hump formation on these fish. If the humpbacked toras are a <br />distinct species, they apparenUy do not seleot the lampa River <br />environment. Bluehead suokers were also colleoted more otten in the <br />Yampa River at CasUe Park than at aIV of the other study areas. <br />Although many faotors or combinations of factors may have <br />been r.8pOns1ble tor the observed ditterenoes in the fish taunas ot the <br />