7971

• UCREFRP Catalog Number: 7971
• Author: Tyus, H. M.
• Title: Evidence for Homing in Colorado Squawfish,
• USFW Year: 1985
• Copyright Material: NO

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productive nursery areas. This behavior may be weak or lacking in other
areas of occupied Colorado squawfish range where spawning habitat has
been cut off by dams, where nursery areas are poor, or where river
management has degraded habitat and fostered exotic fish competitors.
Because optimal reproduction may be dependent on long distance migra-
tion, obstructions to stream passage should be viewed as particularly
threatening. Larval Colorado squawfish may imprint at an early age,
stocking of hatchery reared squawfish that would compete with residents
for food and space but which may not have the ability to home to suit-
able habitat and successfully reproduce, should be deferred until more
information can be obtained.
ACKNOWLEDGEMENTS
The information presented was
life Service Studies funded, in part
the National Park Service. Several
obtaining field data, including C. W
J. J. Krakker and W. B. Harned. Th
vided logistical support.
obtained from U.S. Fish and Wild-
, by the Bureau of Reclamation and
other federal employees aided in
. McAda, E. J. Wick, D. L. Skates,
e States of Utah and Colorado pro-