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Results 1 - 8 of 8 for yolk-sac larva within all areas of the EPA. Only web pages are included. Search all document formats.
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2001 Annual Report | Evaluation of Endocrine-Distrupting Chemical Effects Across Multiple Levels of Biological Organization: Integration of Physiology Behavior and Population Dynamics In Fishes

... that comprise the first year of life were represented: egg, yolk-sac larva, ocean larva, estuarine larva, early juvenile, and late juvenile ...

http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstr... (HTML)

ECOTOX | MED | US EPA06-24-2009

LP. Larva-pupa... larva(e... Pre-larva... Post-larva... yolk sac larvae, sac larvae... Sac fry, yolk sac fry. SG.

http://cfpub.epa.gov/ecotox/help.cfm?help_id=Lifestage%26help_type=def... (HTML)

2000 Annual Report | Effects of Low Dissolved Oxygen on Trophic Interactions, Distributions, and Survival Within the Dominant Planktonic Food Web of a Eutrophic Temperate Estuary

These surveys measured the density and lengths of larvae, densities of zooplankton prey for the larvae, and densities and lengths of invertebrate predators ...

http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstr... (HTML)

Ecosystem Subsidies in Great Lakes Coastal Embayments | Mid-Continent Ecology Division | US EPA01-25-2007

Tucker trawl for sampling fish larvae deployed in Duluth, MN harbor from the MED's R/V ... A yolk-sac stage walleye larva (length 9 mm) caught in the St ...

http://www.epa.gov/med/research_summaries/ecosystems_subsidies_in_grea... (HTML)

Lead, Aquatic Life | Water Quality Criteria | US EPA05-19-2009

... lead on the induction of menta deformities in Chironomus tentans larvae and on their growth and survival... Survival of striped bass larvae and yearlings in relation to contaminants and water quality in ...

http://www.epa.gov/waterscience/criteria/lead/pbref.html (HTML)

Ambient Aquatic Life: Dissolved Oxygen (Saltwater): Cape Cod to Cape Hatteras: References04-24-2008

"This page provides the references available to the Agency for developing or revising aquatic life criteria for Dissolved Oxygen (Saltwater) Cape Cod to Cape Hatteras."

http://www.epa.gov/waterscience/criteria/dissolved/dorefs.html (HTML)

USFWS Biological Opinion on Oregon's Water Quality Standards for Temperature01-29-2008

... alevins require 65-90 days after hatching to absorb their yolk sacs (Pratt 1992... Lost River suckers are bottom feeders primarily eating midge larvae; shortnose suckers feed mostly on zooplankton, especially Daphnia.

http://yosemite.epa.gov/r10/water.nsf/2fb9887c3bbafaaf88256b5800609bf0... (HTML)

1998 Annual Report | An Integrated Approach to Assessing Water Management Options in a Major Watersheds: Extending a Hydrodynamic-Water Quality Model to Include Biological and Politico-Economic Components

... have been developed to simulate spawning and the effects of flows and temperature on egg dispersal and yolk-sac larvae.

http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstr... (HTML)