![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
-
Show
per page
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- The relative frequency of spawning remained low and there was no indication of spawning rhythmicity; moreover, there was only a slight increase in the mean number of eggs per spawn ... there was a marked increase in the relative frequency of spawning in both pairs of tanks.
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- The relative frequency of spawning remained low and there was no indication of spawning rhythmicity; moreover, there was only a slight increase in the mean number of eggs per spawn ... there was a marked increase in the relative frequency of spawning in both pairs of tanks.
- USFWS Biological Opinion on Oregon's Water Quality Standards for Temperature01-29-2008
-
- Migration into the spawning tributary, spawning, and migration back to the mainstem usually takes one month ... constant thermal environment of Borax Lake, the Borax Lake chub spawns throughout the year, though most spawning occurs in March and April ...
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- The relative frequency of spawning remained low and there was no indication of spawning rhythmicity; moreover, there was only a slight increase in the mean number of eggs per spawn ... there was a marked increase in the relative frequency of spawning in both pairs of tanks.
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- The relative frequency of spawning remained low and there was no indication of spawning rhythmicity; moreover, there was only a slight increase in the mean number of eggs per spawn ... there was a marked increase in the relative frequency of spawning in both pairs of tanks.
- 2005 Annual Report | Systems Biology Modeling of Fathead Minnow Response to Endocrine Disruptors03-20-2006
-
- ... Assay – Purdue University A total of 20 FHM breeding pairs (approximately 6 months of age) and approximately 250 juvenile fish ...
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- Spawning success is measured by observing the ability of pairs of fish to spawn naturally, their fecundity, fertilization success and survival of embryos and ...
- Monitoring and Tracking Techniques - Assessing Water Quality and Estimating Pollution Loads | Polluted Runoff (Nonpoint Source Pollution) | US EPA01-13-2010
-
- Such impacts include the destruction of spawning areas, impairments to the habitat for shellfish, changes to aquatic ... measures will generally be determined by applying approaches such as paired-watershed studies and upstream-downstream studies.
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- Paired comparisons indicated statistical differences between the first and second, and the second and third experiments, but not between the ...
- Page Title | About the Gulf Ecology Division | US EPA11-23-2009
-
- Spawning success is measured by observing the ability of pairs of fish to spawn naturally, their fecundity, fertilization success and survival of embryos and ...