6043

• UCREFRP Catalog Number: 6043
• Author: Desert Fishes Council ‎(Edwin Pister, e.
• Title: A Summary of the Proceeding of the Tenth Annual Symposium.
• USFW Year: 1978.
• USFW - Doc Type: November 16-18, 1978.
• Copyright Material: NO

39
"NATIVE" TROUT OF THE RIO YAQUI.
Robert R. Miller, University of Michigan, Ann Arbor.
The three described trouts of the American Southwest are
briefly reviewed. Preliminary observations are given on 13
samples of unidentified trout from Rio Yaqui and adjacent Rio
Mayo, northern Mexico. A total of 154 specimens were collected
between May and July 1978. Probably most, if not all, of these
represent native stocks, although absolute purity cannot be
determined for certain from preserved fish.
These trout are more closely related to the rainbow than to
the cutthroat series, and some osteological characters suggest
a possibly close relationship to Salmo gilae. Morphometric data
and additional skeletal studies are needed as are the determination
of karyotypes and biochemical traits before a confident identifica-
tion will be possible.