Sublethal Effects
Sublethal Effects
Filter Total Items: 22
Minerals Science Team
The Minerals Integrated Science Team focuses on contaminant exposures in the environment that might originate from mineral resource activities including, transportation, storage, extraction and waste management. Perceived health risks to humans and other organisms will be distinguished from actual risks, if any. If actual risks are identified the science produced by this team can inform how to...
Fishing and Hunting Integrated Science Team
The Fishing and Hunting integrated science team focuses on contaminant and pathogen exposures in the environment that could impact the presence and vitality of fish and wildlife populations that drive commercial, recreational and subsistence activities such as hunting and fishing. If actual risks are identified this project will inform how to economically and effectively minimize risk by providing...
Endocrine Disrupting Compounds in the Chesapeake Bay Watershed Science Team
The Chesapeake Bay is the largest estuary in the United States and provides critical resources to fish, wildlife and people. For more than a decade, recreational fish species have been plagued with skin lesions and intersex conditions (the presence of male and female sex characteristics in the same fish) that biologists attributed to exposures to endocrine disrupting chemicals (EDCs)...
New Method Improves Measurement of Bullet Fragments in Culled Varmints
A creative combination of radiography and techniques borrowed from meat processing and gold prospecting led to a better method for determining the lead content in ground squirrels shot by hunters to evaluate potential exposure risk to avian scavengers such as golden eagles ( Aquila chrysaetos ).
Low Levels of Contaminants Found in Great Lakes Tree Swallow Nestlings
Tree swallow nestlings at most study sites in the Great Lakes basin were minimally exposed to organic contaminants.
Is White Sucker Tumor Prevalence in some Wisconsin Rivers Related to Environmental Contaminant Exposures or Other Factors?
The incidence of particular skin and liver tumors on white suckers collected from some Wisconsin rivers corresponded to the degree of urban development within the watershed. Further research is needed to understand the relationship between exposure to urban-sourced contaminants and the initiation, promotion, and potential for population-level effects of these tumors.
Organic Contaminant Levels and the Reproductive Success of Ospreys in Chesapeake Bay
Changes in the regulation and use of some organic chemicals have caused environmental concentrations to stabilize or decline during the past 35 years coincident with a rebound in the osprey ( Pandion haliaetus ) population of the Chesapeake Bay.
Low Levels of Contaminants Found in Great Lakes Tree Swallow Eggs
Tree swallow eggs at most study sites in the Great Lakes basin were minimally exposed to legacy organic contaminants and brominated flame retardants.
New Hepatitis B Virus Discovered in White Sucker (Catostomus commersonii)
The first known hepatitis B virus to infect fish (white sucker; Catostomus commersonii ) has been discovered by U.S. Geological Survey (USGS) scientists.
Environmental Contaminants and Beak Deformities in Alaskan Chickadees
A recent study by the U.S. Geological Survey (USGS) provides some of the first environmental contaminants data for a species of passerine bird (perching birds) in Alaska but leaves unanswered questions as to the cause of beak abnormalities found in this species.Beginning in the late 1990s, biologists and members of the public reported an unusual number of beak abnormalities among black-capped...