Presentation Abstract
The Washington Department of Fish and Wildlife, Puget Sound Restoration Fund, and other project partners have outplanted thousands of hatchery-reared pinto abalone in annual cohorts to ten sites in the San Juan Archipelago since 2009. We measured the “success” of each outplant site by the proportion of total juveniles placed that survived to a reproductive size. In winter 2017 surveys we observed a range of successes, from 0% at the worst site to 5.6% at the best. When nearby individuals are included, this success ranges as high as 7.5%. These percentages do not account for the probability of detection for a given abalone, which available information from tagged abalone suggests is between 20 – 40%. They also do not account for emigration from the sites, which has not been quantified. I’ll discuss these results, their implications for on-site reproduction, and their incorporation into an integrated population model describing the survival and growth of outplanted juveniles. I’ll also discuss the future of pinto abalone recovery, including our new strategy to “repeal and replace” low performing sites, optimize outplant efficiency, and scale-up restoration efforts to achieve population-wide recovery.
Session Title
Species and Habitats of Emerging Concern
Keywords
Abalone, Pinto abalone, Haliotis, Restoration
Conference Track
SSE11: Species and Food Webs
Conference Name
Salish Sea Ecosystem Conference (2018 : Seattle, Wash.)
Document Type
Event
SSEC Identifier
SSE11-486
Start Date
6-4-2018 11:45 AM
End Date
6-4-2018 12:00 PM
Type of Presentation
Oral
Genre/Form
conference proceedings; presentations (communicative events)
Contributing Repository
Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.
Subjects – Topical (LCSH)
Pinto abalone--Washington (State)--San Juan Islands; Hatchery fishes--Mortality--Washington (State)--San Juan Islands; Hatchery releases--Washington (State)--San Juan Islands
Subjects – Names (LCNAF)
Washington (State). Department of Fish and Wildlife
Geographic Coverage
San Juan Islands (Wash.)
Rights
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.
Type
Text
Language
English
Format
application/pdf
Included in
Fresh Water Studies Commons, Marine Biology Commons, Natural Resources and Conservation Commons, Terrestrial and Aquatic Ecology Commons
Survival of hatchery-origin juvenile pinto abalone (Haliotis kamtschatkana) outplanted to restoration sites in the San Juan Islands
The Washington Department of Fish and Wildlife, Puget Sound Restoration Fund, and other project partners have outplanted thousands of hatchery-reared pinto abalone in annual cohorts to ten sites in the San Juan Archipelago since 2009. We measured the “success” of each outplant site by the proportion of total juveniles placed that survived to a reproductive size. In winter 2017 surveys we observed a range of successes, from 0% at the worst site to 5.6% at the best. When nearby individuals are included, this success ranges as high as 7.5%. These percentages do not account for the probability of detection for a given abalone, which available information from tagged abalone suggests is between 20 – 40%. They also do not account for emigration from the sites, which has not been quantified. I’ll discuss these results, their implications for on-site reproduction, and their incorporation into an integrated population model describing the survival and growth of outplanted juveniles. I’ll also discuss the future of pinto abalone recovery, including our new strategy to “repeal and replace” low performing sites, optimize outplant efficiency, and scale-up restoration efforts to achieve population-wide recovery.
