200751000 - Development of a Low-cost Dual-Frequency Acoustic Tracking Capability for Ocean & Freshwater Components of the POST Tracking Array
Sponsor: Kintama Research
Short description: We propose to develop a small and long-lived acoustic tag compatible with the POST array. This should allow seamless measurement of movements and survival of ocean-type chinook >90 mm FL, and permit direct assessment of the role of the ocean on survival.
Location: Mainstem/Systemwide province, None Selected subbasin
Budgets: FY08: $330,199 | FY09:
Primary species:
Anadromous: Chinook: Deschutes River Summer/Fall ESU
Anadromous: Chinook: Lower Columbia River ESU (threatened)
Anadromous: Chinook: Snake River Fall ESU (threatened)
Anadromous: Chinook: Upper Columbia River Summer/Fall ESU
Anadromous: Chinook: Upper Willamette River ESU (threatened)
Anadromous: Sockeye: All Populations
Objectives
| Objective | Description | Subbasin plan | Strategies |
| 01. Establish minimum size limits for V6 tag | 200 V6 tags will be surgically implanted into fall chinook smolts following our published surgical protocols to establish minimum size thresholds for conformally and conventionally potted V6 tags. Growth, survival, and tag retention will be assessed relative to length-matched PIT tag controls. | Lower Snake | |
| 02. Establish Detection Range of V6-180KHz tags | We will measure the detection range of 180 KHz V6 acoustic tags in three major environments: Freshwater (Snake R), Columbia Estuary (Astoria), and Ocean Shelf. Protocol will closely follow that used in the 2000 Innovative proposal, and which was used to design the 69 KHz POST array. Simultaneous measurements will be made of the acoustic range of 69 KHz V9 & V7 tags to ensure that a comparative baseline is collected. | ||
| 03. Data Reduction & Synthesis | Collected data will be used to establish how tag detection range varies with depth of tag in the water column and horizontal distance from receivers. We will develop isopleths of equal probability of detection in the depth-range plane for each environment, and a measure of variability between days. | ||
| 04. Develop an Optimal 180 KHz Acoustic Array | We will use the collected data on tag detection probabilities to formally develop an optimal array geometry and tag programming algorithm. This requires developing a new optimization approach to the problem at hand. The constrained optimization problem is to identify a (or multiple) least-cost array designs that would simultaneously maximize the usable lifespan of V6 tagged smolts and maximize the probability of detection over the array. | ||
| 05. Test Detection Efficiency of the Array Design | 100 fall-type Snake R chinook smolts will be surgically implanted with Vemco V6 tags. A test array consisting of two or more listening lines using the proposed optimal array design will be placed in (probably) the Snake R and detection efficiency will be formally evaluated (by calculating the fraction of smolts not detected on one line but subsequently detected downstream). Depending on the results (whether the smolts remain in the reservoir), we may try to change the detection lines into a "sparse grid" to evaluate in-reservoir overwinter movement and survival. |
Narrative
Recommendations
- ISRP: Unranked
- Council: Not fundable
- BPA: Not fundable