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Low-temperature tolerance of African jewelfish, (Hemichromis letourneuxi)

Because the African jewelfish has a broad salinity tolerance, scientists tested how the species low-temperature tolerance varied at three salinities: freshwater (0 ppt), brackish (10 ppt) and marine (35 ppt) in the laboratory. A field experiment was then conducted to examine the survivorship of individuals when caged in several common aquatic More...

  • Image of an African jewelfish, (Hemichromis letourneuxi)

Conservation Genetics: Fish

This page presents samples of genetics and genomics research from the USGS Biological Resources Discipline about the conservation genetics of fish.

  • Image of a Pallid sturgeon

Estimating Survival Estimates for Migrant Juvenile Salmonids Passing Through the Dalles Dam Using Radio-telemetry

As anadromous juvenile salmonids migrate from freshwater rearing habitats to the ocean, they are vulnerable to a host of factors that affect their survival. Direct effects associated with dam passage (e.g., instantaneous mortality, injury, loss of equilibrium, etc.) and indirect effects (e.g., predation, disease, and physiological stress) More...

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Evaluating Survival Estimates for Migrant Juvenile Salmonids Passing Through the John Day Dam Using Radio-telemetry

As anadromous juvenile salmonids migrate from freshwater rearing habitats to the ocean, they are vulnerable to a host of factors that affect their survival. Direct effects associated with dam passage (e.g., instantaneous mortality, injury, loss of equilibrium, etc.) and indirect effects (e.g., predation, disease, and physiological stress) More...

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