Since 1983, the Streams Project at the Toolik Field Station has monitored physical, chemical, and biological parameters in a 5-km, fourth-order reach of the Kuparuk River near its intersection with the Dalton Highway and the Trans-Alaska Pipeline. In 1989, similar studies were begun on a 3.5-km, third-order reach of a second stream, Oksrukuyik Creek. Fish were collected on each river. Station locations, representing kilomter values certain distances from original phosphorus dripper (see method) were noted. 1985 to 2012 long-term tagging file for Arctic Grayling (Thymallus arcticus) on the Kuparuk River. 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. Arctic grayling young-of-the-year (YOY) were caught multiple times during each summer and measured and weighed as well. This file combines the data from the following data sets: Dataset ID Short name 10325 1985-2012_Kuparuk_Grayling_Tags 10327 1986-2012_Kuparuk_YOY 10329 1989-2011_Oksrukuyik_Grayling_Tags 10330 1989-2012_Oksrukuyik_YOY
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A complete list of all protocols can be found here: http://arc-lter.ecosystems.mbl.edu/streams/arctic-lter-streams-protocol Summary of Site Locations: Kuparuk River: In 1983, phosphorus addition through dripping began at the site designated as 0.0k. Stations downstream of 0.0k have positive numbers and upstream have negative numbers. The reach upstream of the phosphorus addition has remained the reference reach for the duration of this dataset. Downstream of the original phosphorus addition was the fertilized reach. In 1985, the phosphorus dripper moved to 0.59k, creating a recovery reach from 0.0k to 0.59k. In 1996, the dripper was moved downstream to 1.4k, creating a recovery reach between 0.6k and 1.39k. The historic recovery reach from 0k to 0.59k had not been fertilzed for 11 years, so it was then considered part of the reference reach after 1996. In 2011, an additional phosphoric acid dripper was placed at 0k to fertilize the area of stream from 0k to 1.4k. These areas became known as the "Re-Fert" zones. The stream reach above the historic dripper from 1985 to 1996 (0k to 0.59k) became known as Re-Fert 1, and the once fertilized reach from the 1985 to 1996 dripper (0.6k to 1.39k) became known as Re-Fert 2. Reach information can be found in data for specific time periods. A table is providied below for various stations. The 0k riffle is about 75 meters downstream of the actual "0k" deployment location of the dripper. Therefore, the actual dripper location should be known at -0.075k. Oksrukuyik Creek: In 1990, reference sampling took place throughout various stations on the Oksrukuyik. From 1991 to 1992, phosphorus was added at 0k. In 1993, both Nitrogen and Phosphorus were added at 0k. Fertilization came to an end in 1997, leaving a recovery reach downstream of 0k and a reference reach upstream of 0k. A table is providied below for various stations. Summary of Methods: Young of the Year Collection: Young-of-the-year Arctic grayling were captured during the field season are measured, weighed, tagged and released. The fish are most typically caught using aquarium dip-nets. Occasionally, electro-shocking is used. Adult Collection: All grayling adults and juveniles captured during the field season are measured, weighed, tagged and released. This information is added to a long-term tagging file (1985 to present) and will yield information on grayling movements".
April 2015: JPB: All other single analyte files for YOY and fish tags were combined into this one document. Access Database also available. Version 3: March 2016: Updated with 2015 data.
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