Abstract Title

Session S-05F: Ecosystem Restoration: Geomorphic Context, Design Considerations, and Success Stories

Proposed Abstract Title

The Use of Juvenile Chinook Otoliths Related to Restoration Efforts on the Nisqually River

Presenter/Author Information

Kim LarsenFollow

Keywords

Restoration

Location

Room 6C

Start Date

1-5-2014 5:00 PM

End Date

1-5-2014 6:30 PM

Description

The Nisqually Fall Chinook salmon population is one of 27 stocks in the Puget Sound evolutionary significant unit (ESU) listed as threatened under the Endangered Species Act (ESA). Preservation and extensive restoration of the Nisqually delta ecosystem has taken place to assist in recovery of the stock as juvenile Fall Chinook salmon are dependent upon the estuary. Furthermore, a Chinook salmon recovery priority of the Nisqually Indian Tribe is to develop a self-sustaining, naturally spawning population. Currently, this population consists of offspring from both hatchery and natural spawners. Baseline information that includes characterization of life history types, estuary residence times, growth rates, and habitat use is essential to evaluating the potential response of hatchery and natural origin Chinook salmon to restoration efforts and in determining restoration success. Otolith analysis was selected as a means to examine Chinook salmon life history, growth, and residence in the Nisqually Estuary pre- and post-restoration. This research has developed into a collaborative effort with the Nisqually Indian Tribe and other U.S. Geological Survey (USGS) researchers involving extensive post-restoration monitoring of the Nisqually delta as related to the response of the delta in support of Chinook salmon. We will report on differential usage of the Nisqually estuary and the expression of life history diversity by natural and hatchery reared juvenile Chinook salmon preceding and following restoration efforts.

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May 1st, 5:00 PM May 1st, 6:30 PM

The Use of Juvenile Chinook Otoliths Related to Restoration Efforts on the Nisqually River

Room 6C

The Nisqually Fall Chinook salmon population is one of 27 stocks in the Puget Sound evolutionary significant unit (ESU) listed as threatened under the Endangered Species Act (ESA). Preservation and extensive restoration of the Nisqually delta ecosystem has taken place to assist in recovery of the stock as juvenile Fall Chinook salmon are dependent upon the estuary. Furthermore, a Chinook salmon recovery priority of the Nisqually Indian Tribe is to develop a self-sustaining, naturally spawning population. Currently, this population consists of offspring from both hatchery and natural spawners. Baseline information that includes characterization of life history types, estuary residence times, growth rates, and habitat use is essential to evaluating the potential response of hatchery and natural origin Chinook salmon to restoration efforts and in determining restoration success. Otolith analysis was selected as a means to examine Chinook salmon life history, growth, and residence in the Nisqually Estuary pre- and post-restoration. This research has developed into a collaborative effort with the Nisqually Indian Tribe and other U.S. Geological Survey (USGS) researchers involving extensive post-restoration monitoring of the Nisqually delta as related to the response of the delta in support of Chinook salmon. We will report on differential usage of the Nisqually estuary and the expression of life history diversity by natural and hatchery reared juvenile Chinook salmon preceding and following restoration efforts.