Otolith output - Project to study alternative life history types of fall Chinook based on otoliths

Description

This project describes ongoing work by scientists in FE Ecosystem Analysis and EFS Environmental Chemistry programs to identify natal and rearing locations, reconstruct life history strategy, and evaluate juvenile performance of adult Snake River fall Chinook salmon. Due to dramatic declines in its abundance, Snake River fall Chinook salmon was listed as threatened under the Endangered Species Act. Management of Snake River fall Chinook salmon has been hindered by a great deal of uncertainty regarding key aspects of the population. In particular, the existence of an overwintering behavior in a portion of the population has complicated estimates of survival through the hydropower system. Further, differential detectability of redds has limited the ability to accurately develop run reconstructions. Effective management of Snake River fall Chinook salmon will require an understanding of the details of their early life-history, including where juveniles hatch and rear, the proportion of juveniles that exhibit the yearling strategy, when they initiate downstream migration, and estuarine residence time. In this project we investigate early life history movement and performance of Snake River fall Chinook salmon by using microchemistry and microstructure of otoliths sampled from juveniles and adults. Results from this study are intended to help inform recovery planning including future habitat restoration and conservation efforts in the Snake River Basin and Columbia River. Images, increment measurements, and microchemistry trajectories.

Resources

Name Format Description Link
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
0 This table describes data associated with each Snake River fall chinook salmon collected from Lyons Ferry Hatchery in 2011. https://www.webapps.nwfsc.noaa.gov/apex/parrdata/inventory/tables/table/sampled_fish_snake_river_chinook
0 This table describes data associated with each Snake River fall chinook salmon collected from Lyons Ferry Hatchery in 2011. https://www.webapps.nwfsc.noaa.gov/apex/parr/sampled_fish_snake_river_chinook/data/page/
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/18138
0 NWFSC Dataset Information page. Images, increment measurements, and microchemistry trajectories https://www.webapps.nwfsc.noaa.gov/apex/parrdata/inventory/datasets/dataset/6452
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/nwfsc/dmp/pdf/18138.pdf

Tags

  • instrument not applicable
  • northwest fisheries science center
  • lyons ferry hatchery
  • doc/noaa/nmfs/nwfsc
  • national marine fisheries service
  • noaa. u.s. department of commerce
  • fe (fish ecology) division
  • otolith

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