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Relative tolerance of different life stages of Rio Grande silvery minnow to elevated water temperatures


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Buhl, K.J., 2020, Relative tolerance of different life stages of Rio Grande silvery minnow to elevated water temperatures: U.S. Geological Survey data release,


Response of Rio Grande silvery minnow from three year classes and four age groups to one of seven temperatures (nominally; 28.5, 30.0, 31.5, 33.0, 34.5, 36.0, and 37.5ºC) and a control (25ºC) for 96 hours under static conditions.


Point of Contact :
Kevin J Buhl
Originator :
Kevin J Buhl
Metadata Contact :
CERC Data Managers
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
SDC Data Owner :
Columbia Environmental Research Center

Attached Files

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Bench WQ in Temp Bioassays.txt 46.17 KB text/plain
Growth Parameters of Rio Grand silvery minnow in Temp Bioassays.txt 11.09 KB text/plain
In-situ WQ in Temp Bioassays.txt 67.71 KB text/plain
Measured Temps in Temp Bioassays.txt 12.49 KB text/plain
Survival_Mortality in Temp Bioassays.txt 16.44 KB text/plain
Temp Bioassay LL50s_EL50s.txt 3.08 KB text/plain


The endangered Rio Grande silvery minnow (Hybognathus amarus) was historically one of the most abundant and widespread fishes in the Rio Grande basin, but currently occupies only about five percent of its historic range. The decline of the Rio Grande silvery minnow has been attributed to several factors including water diversions, stream channelization, competition with and predation by nonnative fishes, and degraded water quality conditions in the Rio Grande. As a result of water diversions in the Middle Rio Grande, extensive portions of the river channel in the Isleta and San Acacia Reaches become intermittent or dry during the summer and autumn. During such periods, silvery minnows must seek out isolated pools or any other remaining aquatic habitats. Although few data are available on water quality conditions in these isolated pools, it is reasonable to expect that these habitats may experience elevated temperatures and depressed oxygen concentrations. The objective of this laboratory research was to evaluate intraspecific variation in thermal tolerance through determination of the upper lethal and effect levels of temperature to four life stages/age groups of silvery minnows from three year classes.



  • Columbia Environmental Research Center (CERC)
  • USGS Data Release Products



Additional Information


Type Scheme Key
DOI doi:10.5066/P950SXZM
USGS_ScienceCenter Columbia Environmental Research Center
USGS_MissionArea Environmental Health
USGS_keywords Aquatic Biology, Water Quality

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