7978

• UCREFRP Catalog Number: 7978
• Author: Tyus, H. M.
• Title: Chemoreception, Imprinting, and Propagation of Colorado Squawfish and Razorback Sucker
• USFW Year: 1992
• USFW - Doc Type: a Plan of Study
• Copyright Material: YES

Chemoreception, Imprinting, and Propagation of Colorado Squawfish
and Razorback Sucker: a Plan of Study

Harold M. Tyus
u.s. Fish and Wildlife Service

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ABSTRACT

There is evidence that chemoreception is involved in spawning site
selection and other life events in Colorado squawfish Ptvchochei1us lucius and
razorback sucker Xvrauchen texanus. The potential role of olfaction and
imprinting in the recovery of extant populations of these endangered fishes is
discussed and related to their reproduction. A work plan is proposed that
would: 1) evaluate the roles of imprinting, learning, and genetic control on
the reproductive ecology of Colorado squawfish and razorback sucker, 2)
determine the mechanism by which adult fish locate suitable spawning areas, 3)
assess the role of olfaction in habitat selection, and 4) develop plans for
the establishment of new stocks of these fishes using information about their
reproductive ecology.

RESUMEN

Existe evidencia de que la quimiorecepci6n participa en la selecci6n del
sitio de desove y en otros eventos durante el ciclo de vida del Colorado
squawfish Ptvchocheilus lucius y del razorback sucker Xvrauchen texanus. Este
trabajo discute el papel potencial del olfato y la impronta en la recuperaci6n
de poblaciones eXlstentes de estas especies en peligro de extinci6n, con
relaci6n a su reproducci6n. Se propone un plan de trabajo que incl~e:
l)evaluar el papel de la impronta, el aprendizaje y el control gen€tico en la
ecologia reproductiva del Colorado squawfish y del razorback sucker; 2)
determinar 10s mechanismos por medio de 10s cua1es 10s peces adu1tos localizan
las ~reas de desove disponib1es; 3) evaluar el papel del olfato en la
selecci6n del habitat; y 4) desarrollar planes para e1 establecimiento de
nuevos stocks de estos peces utilizando informaci6n acerca de su ecolog(a
reproductiva.

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