9719

• UCREFRP Catalog Number: 9719
• Author: Bestgen, K.R.
• Title: Results of alizarin complexone marking to test survival of early life stages of razorback sucker Xyrauchen texanus and fathead minnow Pimephales promelas in two water types from Ouray National Fish Hatchery.
• USFW Year: 2005.
• USFW - Doc Type: Larval Fish Laboratory, Colorado Stae University
• Copyright Material: NO

Table 1. Percent survival of razorback sucker Xyrauchen texanus hatched in late Apri12005 and
8-day-old fathead minnows Pimephales promelas on two different test dates. The 7 July test
used relatively soft water from Ouray National Fish Hatchery (Ouray), while the X~ August test
used hard water from a different, less accessible well source. Survival values were from batches
of 10 fish, replicated three times each, for each species, water, and testing date combination.
Reference water was a mix of Ouray, Aquatic Research Laboratory (ARL), and distilled water in
equal portions.
Percent survival,
by water type
Date Species ARL Ouray Reference
7-Jul-05 razorback sucker 100 100 100
fathead minnow .100 93 93
(90 - 100) (78 -100)
15-Aug-05 razorback sucker 93 100 97
(90 - 100) (90 - 100)
fathead minnow 97 90 90
(90 -100) (80 - 100) (80 -100)
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