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Last modified
7/14/2009 5:02:36 PM
Creation date
5/20/2009 2:49:41 PM
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UCREFRP
UCREFRP Catalog Number
9550
Author
Snyder, D. E. and R. T. Muth.
Title
Catostomid Fish Larvae and Early Juveniles of the Upper Colorado River Basin - Morphological Descriptions, Comparisons, and Computer-interactive Key.
USFW Year
2004.
USFW - Doc Type
Fort Collins, CO.
Copyright Material
NO
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<br /> <br />, <br /> <br />1120 <br /> <br />1100 <br /> <br />420 <br /> <br />I <br />, <br />I <br />I <br />I <br />I <br />I <br />I <br />L______ _ <br />UTAH <br /> <br />10S0 <br /> <br />1060 <br /> <br />420 <br /> <br />Flaming Gorge <br />Res. <br /> <br />400 <br /> <br />380 <br /> <br />I <br />I <br />----------f <br /> <br />ARIZONA I <br />I <br /> <br />1120 <br /> <br />110" <br /> <br />Fig. 1. The Upper Colorado River System. <br /> <br />(minnow) and catostomid fishes of the Amer- <br />ican southwest. Their photograph-illustrated <br />key for the Lower Colorado River Basin below <br />Lake Mead was limited to meso larval stages <br />(developmental intervals defined below), but <br />included razorback sucker, flannel-mouth <br />sucker, and Pantosteus species. All of their <br />Pantosteus larvae, some of which were <br />illustrated as bluehead sucker and desert sucker <br />(Catostomus clarki), have since been recognized <br />as desert sucker by Smith (1966). Although <br />pigmentation of bluehead and mountain sucker <br />meso larvae oflike size is typically similar to that <br />documented by Winn and Miller (1954) for <br />desert sucker, it can vary greatly, with dorsal <br /> <br />___ WYOMING <br />----------- <br />COLORADO <br /> <br />400 <br /> <br />N <br /> <br />+ <br /> <br />3S0 <br /> <br />I <br />o <br /> <br />ml <br />I I <br />50 100 <br />I I <br />100 150 <br />km <br /> <br />NEW MEXICO <br /> <br />1080 <br /> <br />1060 <br /> <br />and lateral pigmentation occasionally being <br />indistinguishable from that illustrated and de- <br />scribed by Winn and Miller (1954) for <br />razorback sucker. <br />Few authors other than Winn and Miller <br />(1954) and ourselves have provided descriptive <br />information on the early life stages of native <br />species covered in this guide. Minckley and <br />Gustafson (1982) chronicled early development <br />of razorback sucker, but their illustrations are <br />sketchy and include only lateral views. Douglas <br />(1952) published photographs of a razorback <br />sucker proto larva (or recently transformed <br />mesolarva) without yolk and a to-cm specimen <br />labeled as a juvenile razorback sucker, but, as <br /> <br />3 <br />
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