7715

• UCREFRP Catalog Number: 7715
• Author: U.S. Fish and Wildlife Service, C. R. F. R. T.
• Title: Bonytail Chub Recovery Plan.
• USFW Year: 1990.
• USFW - Doc Type: \
• Copyright Material: NO

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21. Describe soawnina reauirements.

Little is known about reproduction of bony tail chub in the wild.
Most of the existing information on bony tail chub spawning has been
obtained through culture at Dexter. Understanding this life history
process is vital in saving the bony tail chub from extirpation and
eventually achieving recovery.

22. Determine role of oredation/comoetition.

Additional information on intra- and interspecific competition and
the related biological and ecological interactions must be obtained.
Studies designed to answer questions of competition with or predation
by nonnative species must be initiated.

23. Describe movement oatterns.

Studies of reintroduced and, if found, existing bony tail chub
populations should be conducted to provide information on the
movement and behavior of the species.

24. Identify and describe essential habitat.

Specific physical, chemical, and biological components of the habitat
required by all life stages should be described. Water velocity,
depth, and substrate required for spawning, nursery, and
over-wintering areas should be delineated.

25. Describe food habits and feedina behavior.

Some information has been collected, but further investigations are
necessary to describe this important parameter.

26. Evaluate aaina techniaues.

An evaluation of present techniques used to estimate the age of
bony tail must be conducted to ensure the accuracy of age estimates.

27. Describe aae distribution and arowth rates.

Continuous length and weight data of stocked fish should be
maintained by monitoring agencies. Age and growth information should
be recorded from hatchery and wild fish. This will require an
evaluation of aging techniques to ensure accurate estimates of age.

28. Determine reasons for and sianificance of hybridization.

Hybridization may pose a threat to the continued existence of the
bony tail chub genotype, especially if habitat alteration results in
the disruption of normal isolating mechanisms.

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