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temperature dependent, each increasing with increased <br />temperature [Gale 19861. Reported number of eggs per gravid <br />female ranged 1,177-5,411 (mean 2,205) [Jennings and Saiki 1990]. <br />Eggs and Young. Eggs are demersal, adhesive, and have a <br />maximum diameter of 1.0-1.3 mm. Incubation time is 3-5 d at <br />water temperatures of 21-28°C [Taber 1969; Gale 19861. Total <br />length at hatching is 4 mm [Snyder 19811. Estimated daily <br />growth of larvae and early juveniles is 0.2-0.3 mm [Carlson et <br />al. 1979] . Estimated TL at end of first year is 540 mm <br />[Carlander 19691. In Oklahoma and Texas, young-of-year <br />exhibited rapid growth in summer and slow growth in <br />September-March [Farringer et al. 19791. <br />Examples of Interactions with Native Colorado River Basin Fishes: <br />E Contributed significantly to decline of native fishes in <br />Arizona [Minckley 19731. <br />¦ Associated with decline of native fishes in the Moapa <br />River, Nevada [Deacon and Bradley 19721. <br />¦ In the Virgin River, competition for food between red <br />shiner and woundfin Plagopterus argentissimus may occur. <br />Relatively high diet overlap was demonstrated between <br />speckled dace and red shiner [Greger and Deacon 1988). <br />¦ Habitat partitioning may occur when spikedace Meda <br />fulgida and red shiner co-occur in a stream [Rinne 1991). <br />¦ Predation on cypriniform larvae (mostly catostomids, some <br />identified as bluehead sucker by adult ted shiner during <br />early summer 1991 was documented in ephemeral shoreline <br />embayments near confluence of the Yampa and Green rivers <br />[Ruppert et al. 19931. Hypothesized that if predation by red <br />shiner on fish larvae is in part a function of availability <br />of alternative invertebrate prey, and if abundance of <br />preferred invertebrate forage is lower during spring and <br />early summer in at least some nursery habitats, early larvae <br />of razorback sucker may be especially vulnerable. <br />¦ In the Green River, Utah, 1980, high habitat-use overlap <br />(index value of 0.90) between age-0 Colorado squawfish and <br />red shiner. High diet overlap (index values ranged 0.7-0.8) <br />between Colorado squawfish 22-40 mm TL and all sizes of red <br />shiner examined. Colorado squawfish 41-59 mm TL fed heavily <br />on red shiner larvae [McAda and Tyus 1984). <br />¦ In the Colorado and Green rivers, Colorado and Utah, <br />habitats of age-0 Colorado squawfish and red shiner <br />overlapped [McAda and Kaeding 1989b] . <br />40