9361

• UCREFRP Catalog Number: 9361
• Author: Beyers, D. W. and C. Sodergren.
• Title: Assessment and Prediction of Effects fo Selenium Exposure to larval Razorback Sucker.
• USFW Year: 1999.
• USFW - Doc Type: Project 95/CAP-6 SE,
• Copyright Material: NO

1
1
1

is straight forward: coefficient ~3, represents a test for effects due to exposure to dissolved
selenium; Rz represents a test for effects due to exposure to dietary selenium or fish species.
Analysis of fish growth during the 28-day dietary study was conducted using a similar
methodology. PROC GENMOD (with options LINK=IDENTITY, DIST=NORMAL; SAS
1993) was used to describe the response of fish mass and total length as a function of dissolved
and dietary selenium exposure.
Estimates of 96-hour median lethal concentrations for razorback sucker and fathead
minnow in acute studies were obtained using PROC PROBIT (SAS 1990). In all cases,
transformations (log,o) were used if they improved the fit of regression models. Graphical
analyses of data and residual plots were conducted to confirm that regression models were
appropriate and to evaluate compliance with statistical assumptions.
9