9586

• UCREFRP Catalog Number: 9586
• Author: Desert Fishes Council.
• Title: Proceedings of the Desert Fishes Council Volume XXVI 1994 Annual Symposium.
• USFW Year: 1994.
• USFW - Doc Type: Furnace Creek, CA.
• Copyright Material: NO

PROCEEDINGS OF THE DESERT FISHES COUNCIL, 1994 SYMPOSIUM
Rapids to Boulder Canyon, 1978-79. Final
Report to USDI Water and Power Resources
Service, Contract No. 8-07-30-X0025. Arizona
Game and Fish Department, Kingman. 197 pp.
MCCARTHY, M.S., AND W.L. MINCKLEY. 1987.
Age Estimation for Razorback Sucker (Pisces:
Catostomidae) from Lake Mohave, Arizona and
Nevada. Journal of the Arizona-Nevada
Academy of Science 21:87-97.
MELANDER, W.C. 1962. Arizona Game and Fish
Department Periodic Resurvey of Waters in
MODDE,T.`; IRVING,D.B. (TM and DBI- U.S. Fish and Wildlife Service)
VOLUME XXVI - published 1995
District III, Completion - Report, Project
F-7-R-5, Work Plan 3, Job B-1. 13 pp.
MORGENSEN, S.A., AND C.O. PADILLA. 1982.
The Status of the Black Bass Fishery in Lake
Mead and a Program Toward Restoration
and Enhancement. Final Report to U.S. Bureau
of Reclamation, Contract No. 7-07-30-X0028.
Arizona Game and Fish Department, Kingman;
Nevada Department of Wildlife, Las Vegas. 114
PP.
Seasonal movements of razorback sucker in the middle Green River, Utah
Movimientos estacionales del matalote jorobado en el Medio Rio Green en Utah
KEYWORDS: razorback sucker; telemetry; movements; habitat use; spawning
ABSTRACT
Seven adult razorback sucker Xyrauchen texanus were collected over spawning bars in the Middle Green
River, Utah, and implanted with radio transmitters in the spring of 1993. Fish habitat use was monitored during the
first summer and seasonal movement and spawning fidelity was observed during the second year following
spawning. None of the razorback suckers implanted with transmitters moved over 42 km from their wintering sites
to spawning sites. Greatest movement occurred during post-spawning and mid-summer location changes, with
several movements exceeding 100 km. Most fish spent the summers of 1993 and 1994, and all fish spent the winter
of 1993-1994 in Split Mountain Canyon in Dinosaur National Monument. During the first summer most fish
occupied deep, slower velocity macrohabitats.
Of the six surviving adult males implanted, four returned to the spawning sites used the previous year. One
male spawned at a different site and the remaining male either spawned at a previously unknown spawning location
or may not have spawned in 1994. Movement to spawning locations appeared triggered by discharge rather than
temperatures, however, greatest movement activity occurred during a combination of rising discharge and maximum
daily water temperatures exceeding 14°C.
CLAVES: matalote jorobado; telemetria; movimientos; use de habitat; desove
RESUMEN
Siete adultos de matalotes jorobados Xyrauchen texanus fueron colectados en las areas de desove del Medio
Rfo Green, Utah, y marcados con radios transmisores en la primavera de 1993. El use de habitat del pez fue
monitoreado durante el primer verano y movimiento estacional, la fidelidad del desove fue observada durante el
segundo afio siguiente al desove. Ninguno de los matalotes jorobados implantados con radio transmisores se
movieron mas de 42 km desde sus sitios de invierno a los sitios de desove. Los movimientos mas grandes
ocurrieron durante el post-desove y a mediados del verano, con varios movimientos que excedieron los 100 km.
La mayorfa de los peces se mantuvieron el verano de 1993 y 1994, y todos los peces se mantuvieron el invierno
de 1993-1994 en Split Mountain Canyon en Dinosaur National Monument. Durante el primer verano la mayoria
de los peces se mantuvieron en la profundidad, y en macrohabitats de bajas velocidades.
De los seis machos adultos sobrevivientes con radios, cuatro regresaron a los sitios de desove usados en el
ano anterior. Un macho desov6 en un sitio diferente y los machos restantes desovaron en localidades de desove
previamente desconocidas, o pudieron no haber desovado en 1994. Los movimientos a las localidades de desove
parecen ser motivadas por descargas mas que por la temperatura, sin embargo, los movimientos mas grandes
ocurren durante una combinaci6n de una elevaci6n de las descargas y temperaturas diarias maximas del agua que
exceden los 14°C
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