Environmental DNA results for March 2022 smallmouth bass surveillance in the Gardner River, Montana

These data were compiled for modeling efforts of Bureau of Reclamation National Environmental Policy Act (NEPA) analyses for the Colorado River in Grand Canyon, Arizona. Objective(s) of our study were to forecast water temperature, smallmouth bass population growth rate, and smallmouth bass entrainment rates under different water management scenarios. These data represent forecasted smallmouth bass entrainment rates and smallmouth bass population growth rates. Data were collected in 2023 and 2024 by the Bureau of Reclamation CRMMS and then used by the U.S. Geological Survey-Southwest Biological Science Center-Grand Canyon Monitoring & Research Center in the modeling process. These data can be used to evaluate different water management strategy potential impacts on smallmouth bass.

These data were compiled for modeling efforts of Bureau of Reclamation National Environmental Policy Act (NEPA) analyses for the Colorado River in Grand Canyon, Arizona. Objective(s) of our study were to forecast water temperature, smallmouth bass population growth rate, and smallmouth bass entrainment rates under different water management scenarios. These data represent forecasted smallmouth bass entrainment rates and smallmouth bass population growth rates. Data were collected in 2023 and 2024 by the Bureau of Reclamation CRMMS and then used by the U.S. Geological Survey-Southwest Biological Science Center-Grand Canyon Monitoring & Research Center in the modeling process. These data can be used to evaluate different water management strategy potential impacts on smallmouth bass.

Field data of age-0 smallmouth bass (Micropterus dolomieu) estimated age, lengths and weights, distribution from field sampling, and results from environmental DNA surveys from the Yellowstone River in Montana. Data were used in conjunction with existing stream temperature data from USGS gages to evaluate if temperature is related to age-0 size at the onset of winter.

Field data of age-0 smallmouth bass (Micropterus dolomieu) estimated age, lengths and weights, distribution from field sampling, and results from environmental DNA surveys from the Yellowstone River in Montana. Data were used in conjunction with existing stream temperature data from USGS gages to evaluate if temperature is related to age-0 size at the onset of winter.

This data release presents calculated accumulated wastewater (ACCWW, as a percent of total streamflow) values for 43 National Hydrologic Dataset Version 2.1 (NHDPlus V2.1) stream segments coinciding with long-term smallmouth bass sampling locations (Table 1) in the Shenandoah River Watershed (encompassing parts of Virginia and West Virginia, USA). Values are calculated for quarter-year (Quarter 1 [Q1], January - March; Quarter 2 [Q2], April - June; Quarter 3 [Q3], July-September; Quarter 4 [Q4], October-December) time scales (Table 2) and annual time scales (Table 3) for years 2000 to 2018. Estimates at a stream segment represent the combined total upstream wastewater discharges as well as direct discharges into the stream segment. Any users of these data should review the entire metadata record and the associated manuscript (see Larger Work Citation). See 'Distribution Liability' statements for more information.

This data release presents calculated accumulated wastewater (ACCWW, as a percent of total streamflow) values for 43 National Hydrologic Dataset Version 2.1 (NHDPlus V2.1) stream segments coinciding with long-term smallmouth bass sampling locations (Table 1) in the Shenandoah River Watershed (encompassing parts of Virginia and West Virginia, USA). Values are calculated for quarter-year (Quarter 1 [Q1], January - March; Quarter 2 [Q2], April - June; Quarter 3 [Q3], July-September; Quarter 4 [Q4], October-December) time scales (Table 2) and annual time scales (Table 3) for years 2000 to 2018. Estimates at a stream segment represent the combined total upstream wastewater discharges as well as direct discharges into the stream segment. Any users of these data should review the entire metadata record and the associated manuscript (see Larger Work Citation). See 'Distribution Liability' statements for more information.

These data was collected in conjuction with Upper Mississippi River Restoration-Long Term Resource Monitoring (UMRR-LTRM) element data. The goal of this data collection was to assess age structure of smallmouth buffalo Ictiobus bubalus in the Upper Mississippi River system. Through ongoing UMRR-LTRM efforts, we collected fish with a goal 10 smallmouth buffalo from 20mm length groups, beginning at 100mm of total length. Upon collection fish were measured, weighed and frozen, then transported to the Illinois River Biological Station in Havana Illinois. Upon completion of fish collection, fish were thawed and both lapillus otoliths were removed and a sex determination was made via visual inspection of the gonads. Lapillus otoliths were then thin sectioned, polished on 1000 and 2000 grit sandpaper until annuli were clearly visible. Fish age was then estimated independently by 3 readers using the polished thin sections, any disagreements were discussed and a final consensus age estimation was determined for every fish. When consensus could not be reached that sample was discarded from final dataset. Annuli for all aged fishes were then measured from the focus of the otolith for later analysis. This was done by measuring from the focus, or center of otolith formed near fish's birth, to each identified annuli. Every measurement began at the focus, so each successive annuli will have a larger length than preceeding annuli as fish grows over time.

These data was collected in conjuction with Upper Mississippi River Restoration-Long Term Resource Monitoring (UMRR-LTRM) element data. The goal of this data collection was to assess age structure of smallmouth buffalo Ictiobus bubalus in the Upper Mississippi River system. Through ongoing UMRR-LTRM efforts, we collected fish with a goal 10 smallmouth buffalo from 20mm length groups, beginning at 100mm of total length. Upon collection fish were measured, weighed and frozen, then transported to the Illinois River Biological Station in Havana Illinois. Upon completion of fish collection, fish were thawed and both lapillus otoliths were removed and a sex determination was made via visual inspection of the gonads. Lapillus otoliths were then thin sectioned, polished on 1000 and 2000 grit sandpaper until annuli were clearly visible. Fish age was then estimated independently by 3 readers using the polished thin sections, any disagreements were discussed and a final consensus age estimation was determined for every fish. When consensus could not be reached that sample was discarded from final dataset. Annuli for all aged fishes were then measured from the focus of the otolith for later analysis. This was done by measuring from the focus, or center of otolith formed near fish's birth, to each identified annuli. Every measurement began at the focus, so each successive annuli will have a larger length than preceeding annuli as fish grows over time.

These data was collected in conjuction with Upper Mississippi River Restoration-Long Term Resource Monitoring (UMRR-LTRM) element data. The goal of this data collection was to assess age structure of smallmouth buffalo Ictiobus bubalus in the Upper Mississippi River system. Through ongoing UMRR-LTRM efforts, we collected fish with a goal 10 smallmouth buffalo from 20mm length groups, beginning at 100mm of total length. Upon collection fish were measured, weighed and frozen, then transported to the Illinois River Biological Station in Havana Illinois. Upon completion of fish collection, fish were thawed and both lapillus otoliths were removed and a sex determination was made via visual inspection of the gonads. Lapillus otoliths were then thin sectioned, polished on 1000 and 2000 grit sandpaper until annuli were clearly visible. Fish age was then estimated independently by 3 readers using the polished thin sections, any disagreements were discussed and a final consensus age estimation was determined for every fish. When consensus could not be reached that sample was discarded from final dataset. Annuli for all aged fishes were then measured from the focus of the otolith for later analysis. This was done by measuring from the focus, or center of otolith formed near fish's birth, to each identified annuli. Every measurement began at the focus, so each successive annuli will have a larger length than preceeding annuli as fish grows over time.