LTER network Toolik Field Station MBLhome page

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Toolik Weather Graphs

Arctic LTER Weather Stations

Toolik Webcam

Animated Gif of yesterday's Webcam

Arctic LTER Inhouse login

  • 1985-2012_Kuparuk_Grayling_Tags - 1985 to 2012 long-term tagging file for Arctic Grayling (Thymallus arcticus) on the Kuparuk River. Phosphorus addition has occurred since 1983; station sites are relative distance from the original 1983 phosphorus dripper. Stations include sites in a reference, recovery, and fertilized reach. Reaches were defined based on the location of phosphorous addition (see methods). All grayling adults and juveniles captured during the field season are measured, weighed, tagged and released. Grayling were tagged originally with a colored tag with a number. In 1993, researchers started pit tagging the grayling. These pit tags can be read with an antenna to track the migration of the grayling throughout the Kuparuk River system.

  • 1986-2003_Kuparuk_GraylingGrowth - Adult Arctic Grayling were caught and tagged in the Kuparuk River. A second fishing campaign occurred later in the summer, and any fish that was recaptured was remeasured to determine growth. Phosphorus addition has occurred since 1983; station sites are relative distance from the original 1983 phosphorus dripper. Stations include sites in a reference, recovery, and fertilized reach. Reaches were defined based on the location of phosphorous addition (see methods). Arctic Grayling were caught early in the field season, tagged, and recaptured late in the field season. During each capture, the grayling were measured for length and weight. With fish that were recaptured, growth of each grayling during specific seasons was calculated.

  • 1986-2010_Kuparuk_YOY_growth - Arctic grayling young-of-the-year (YOY) were caught multiple times during each summer and measured and weighed. Fish were caught at designated stations from the Kuparuk River were collected during each summer from 1986 to current time. YOY growth could be calculated by using data from the first day fish were caught compared to the last day in a field season. This data can be compared to where phosphorous additions occured in the Kuparuk River. Phosphorus addition has occurred since 1983; station sites are relative distance from the original 1983 phosphorus dripper. Stations include sites in a reference, recovery, and fertilized reach. Reaches were defined based on the location of phosphorous addition (see methods). Phosphoric acid is added to the stream to increase the soluble reactive phosphorus by 0.32 uM. YOY were caught and transported to Toolik Field Station for measurements of weight and mass.

  • 1989-2011_Oksrukuyik_Grayling_Tags - 1989 to 2002; 2010-2011 long-term tagging file for Arctic Grayling (Thymallus arcticus) on the Oksrukuyik. All grayling adults and juveniles captured during the field season are measured, weighed, tagged and released. Grayling were tagged with a colored tag with a number. . In 1993, researchers started pit tagging the grayling. These pit tags can be read with an antenna to track the migration of the grayling throughout the Kuparuk River system

  • 1990-2001_Oksrukuyik_GraylingGrowth - Arctic Grayling were collected at designated stations on the Oksrukuyik from 1990 to current time. Phosphorus addition has occurred from 1991 to 1996; station sites are relative distance from the original 1991 dripper. Grayling were caught, pit tagged, weighed, measured, and then released back into the river.

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