Aquaculture America 2024

February 18 - 21, 2024

San Antonio, Texas

ECOSYSTEM SERVICE EVALUATION OF KELP FARMS VERSUS NATURAL KELPS BEDS IN KODIAK ALASKA

  Author(s): Alix Laferriere*, Alicia Bishop, Connor Cleary, Allie Conrad, Alf Pryor, Lexa Meyer

 

NOAA Fisheries Alaska Fisheries Science Center

Kodiak Laboratory

301 Research Court

Kodiak, AK 99615

Alix.Laferriere@noaa.gov

 



Seaweed farming is a rapidly growing industry in Alaska.  In 2022, Alaska produced 536,000 pounds of kelp which was nearly double the production of kelp in 2021.  An important question for both scientists and industry is to better understand the ecosystem interaction of kelp farms in the nearshore environment. Discussions with industry and collaborators have identified that there is a need to quantify the ecosystem services, specifically habitat provisioning of kelp aquaculture for commercial or ecologically-important species.  In fall of 2022, the Alaska Fisheries Science Center initiated a small-scale study in Kodiak, Alaska to assess juvenile and adult fish habitat use of kelp farms. We asked a cascading set of basic questions 1) What is the species composition within a kelp farm versus a natural  kelp bed, 2)  How does the population change over the course of the grow-out season and, 3) What happens to the population post-harvest? We are using a three pronged approach to assess the habitat provisioning of local kelp farms and natural kelp beds through: visual surveys via go-pro cameras; e-DNA collection and analysis; and juvenile fish collection via Standard Monitoring Units for Recruitment of Fishes (SMURFs). We present here our methods and preliminary results of our study.