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<br />ACKNOWLEDGMENTS
<br />
<br />This publication is the culmination of a quarter century of work by the Larval Fish Laboratory
<br />(LFL) on early life stages of the species covered. It and the preceding edition (Snyder and Muth
<br />1990), are built upon earlier descriptions and keys sponsored by the (U.S.) Bureau of Land
<br />Management (BLM, Colorado Office), Colorado Division of Wildlife (CD OW, former Non-Game
<br />Section), Colorado State University Experiment Station, Ecosystem Research Institute (Logan, Utah),
<br />U.S. Fish and Wildlife Service (USFWS, Colorado River Fishery Project and Reno Fisheries
<br />Assistance Office), and Utah Division of Wildlife Resources (UDWR). Preparation and publication
<br />of the preceding edition were sponsored by CD OW (Endangered Fishes Investigations SE-3) and
<br />USFWS (Division of Federal Aid). Preparation of the updates, new description (longnose sucker),
<br />and computer-interactive key for this new edition, and publication thereof, was'jointly sponsored by
<br />CD OW and the Upper Colorado River Endangered Fish Recovery Program (UCRP) through the
<br />(U.S.) Bureau of Reclamation (BR, Upper Colorado Regional Office, Salt Lake City). The San Juan
<br />River Basin Recovery Implementation Program (SJRIP), via BR, also helped fund publication. The
<br />UCRP is a joint effort of the USFWS, BR, Western Area Power Administration, states of Colorado,
<br />Utah, and Wyoming, Upper Basin water users, environmental organizations, the Colorado River
<br />Energy Distributors Association, and the National Park Service. Participants in the SJRIP are the
<br />Jicarilla Apache and Navajo Nations, Southern Ute Indian and Ute Mountain Ute Indian Tribes, states
<br />of Colorado and New Mexico, U.S. Bureau of Indian Affairs, BLM, BR, and USFWS.
<br />Most collected specimens used for developmental study were taken or processed by LFL for
<br />various agencies working in the Upper Colorado River Basin (CDOW, UDWR, BLM, USFWS).
<br />Additional reared or collected specimens were donated by or borrowed from William Hauser (Alaska
<br />Department ofFish and Game, Anchorage), Philip Harrison (CSU), Arizona State University Center
<br />for Environmental Studies (Tempe, via Daniel Langhorst and Paul Marsh), Bio/West Inc. (Logan,
<br />Utah, via Paul Holden), Ecosystem Research Institute (Logan, Utah, via Richard Valdez and John
<br />Carter), Museum of Southwestern Biology (Albuquerque, New Mexico, via Howard Brandenburg,
<br />Steven Platania, and Alexandra Snyder), Utah Cooperative Fish and Wildlife Research Unit (Utah
<br />State University, Logan, via Timothy Modde and Neal Muirhead), UDWR (Salt Lake City, via Randy
<br />Radant and Dennis Shirley), and USFWS-Colorado River Fishery Project (Grand Junction, Colorado,
<br />and Vernal, Utah, via Lynn Kaeding and Harold Tyus), Fisheries Assistance Office (Reno, Nevada
<br />via Donald King and Gary Scoppetone), and Dexter National Fish Hatchery (New Mexico, via Roger
<br />Hamman). Parental stock for white sucker (Catostomus commersoni) culture was obtained from a
<br />local pond owned by Louis Swift. Study specimens (except those returned to lenders) are maintained
<br />as part of the LFL Collection.
<br />Developmental studies at LFL have depended on the assistance and cooperation of many
<br />individuals, including Colorado State University (CSU) students serving as Larval Fish Laboratory
<br />volunteers or employees. Edmund Wick (LFL) was responsible for obtaining fertilized eggs and
<br />rearing developmental study series of many of the species studied. Marian Allen, Kevin Bestgen,
<br />Daniel Beyers, Nick Bezzerides, Robert Compton, Sean Seal, and Koreen Zelasko ofLFL, and Daniel
<br />Brauch, Steve Braylee, Kevin Rogers, and most successfully, Kenneth Kehmeier and crew of CD OW
<br />assisted with efforts to capture ripe longnose sucker (Catostomus catostomus) for our most recent
<br />culture effort. Dale Brown, Mark Castagneri, Albert Davis, Gary Dean, Keith Fulsos, Carol
<br />Jefferson, Philip Harrison, David Herbet, Jeffrey Pearson, and Sean Seal (Brown and Fulsos via
<br />summer CET A Youth Program) assisted with culture or organization of reared or collected specimens
<br />for study. James Barrowman, C. Lynn Bjork, William Emerson, Lyndon Evans, Stephanie Salyer,
<br />Diane Miller, Sean Seal, and Edmund Wick assisted with descriptive analysis of specimens. Timothy
<br />Hill, Jack Piccolo, Steven Platania, and Sean Seal cleared and stained some specimens. Sean Seal
<br />captured digital images for illustration of skeletal features for longnose sucker.
<br />C. Lynn Bjork prepared Figures 1,3,4,5, and 6, (and variants of Figs. 3,4, and 5 used in the
<br />computer-interactive key) and all original and previously published drawings of larval and early
<br />juvenile fish in the species accounts except selected drawings of white sucker larvae which were
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