ANNUAL STOCK ASSESSMENT AND FISHERY EVALUATION REPORT: AMERICAN SAMOA ARCHIPELAGO FISHERY ECOSYSTEM PLAN 2017 Western Pacific Regional Fishery Management Council 1164 Bishop St., Suite 1400 Honolulu, HI 96813 PHONE: (808) 522-8220 FAX: (808) 522-8226 www.wpcouncil.org The ANNUAL STOCK ASSESSMENT AND FISHERY EVALUATION REPORT for the AMERICAN SAMOA ARCHIPELAGO FISHERY ECOSYSTEM PLAN 2017 was drafted by the Fishery Ecosystem Plan Team. This is a collaborative effort primarily between the Western Pacific Regional Fishery Management Council, NMFS-Pacific Island Fisheries Science Center, Pacific Islands Regional Office, Division of Aquatic Resources (HI) Department of Marine and Wildlife Resources (AS), Division of Aquatic and Wildlife Resources (Guam), and Division of Fish and Wildlife (CNMI). This report attempts to summarize annual fishery performance looking at trends in catch, effort and catch rates as well as provide a source document describing various projects and activities being undertaken on a local and federal level. The report also describes several ecosystem considerations including fish biomass estimates, biological indicators, protected species, habitat, climate change, and human dimensions. Information like marine spatial planning and best scientific information available for each fishery are described. This report provides a summary of annual catches relative to the Annual Catch Limits established by the Council in collaboration with the local fishery management agencies. Edited By: Marlowe Sabater, Asuka Ishizaki, Thomas Remington, and Sylvia Spalding, WPRFMC. This document can be cited as follows: WPRFMC, 2018. Annual Stock Assessment and Fishery Evaluation Report for the American Samoa Archipelago Fishery Ecosystem Plan 2017. Sabater, M., Ishizaki, A., Remington, T., Spalding, S. (Eds.) Western Pacific Regional Fishery Management Council. Honolulu, Hawaii 96813 USA. ii The Western Pacific Regional Fishery Management Council acknowledges the valuable contributions of the following Plan Team members for drafting sections of this report: American Samoa Department of Marine and Wildlife Resources: Domingo Ochavillo, Yvonne Mika, and Tepora Lavatai. NMFS Pacific Islands Fisheries Science Center: Justin Hospital, Ivor Williams, Joe O’Malley, Brett Taylor, Michael Parke, Phoebe Woodworth-Jefcoats, John Marra, Tom Oliver, Frank Parrish, T. Todd Jones, Minling Pan, and Kirsten Leong. NMFS Pacific Islands Regional Office: Melanie Brown and Sarah Ellgen. Pacific Islands Regional Planning Body: Sarah Pautzke. The Council also acknowledges the staff of the NMFS PIFSC Western Pacific Fisheries Information Network (WPacFIN) for providing the technical support to generate the data summaries. The Council would like to thank the following individuals for their contributions to the report: Catherine Pham, Lennon Thomas, and Dawn Golden. iii This page was intentionally left blank. iv Annual SAFE Report for the American Samoa Archipelago FEP Executive Summary Executive Summary As part of its five-year fishery ecosystem plan (FEP) review, the Council identified the annual reports as a priority for improvement. The former annual reports have been revised to meet the National Standard regulatory requirements for Stock Assessment and Fishery Evaluation (SAFE) reports. The purpose of the reports is twofold: to monitor the performance of the fishery and ecosystem to assess the effectiveness of the FEP in meeting its management objectives, and to maintain the structure of the FEP living document. The reports are comprised of three chapters: fishery performance, ecosystem considerations, and data integration. The Council will iteratively improve the annual SAFE report as resources allow. The fishery performance section of this report first presents a general description of the local fisheries, including both bottomfish and coral reef management unit species (MUS). The fishery data collection system encompasses shore-based and boat-based creel surveys, commercial receipt books, and fisher inventories. The fishery statistics for each MUS are organized into a meta-data summary table to showcase the values for the most recent fishing year in comparison to short-term (10-year) and long-term (20-year) averages. Time series for catch and effort statistics are also presented. For 2017, there was no MUS catch in American Samoa that exceeded the prescribed annual catch limits (ACLs). The bottomfish fishery performance in American Samoa appeared to show a slight decrease. Relative to the short-term average, total catch of all species caught with the bottomfishing gear declined by 30%, and total landings sold also decreased by 23% but were within the 10-year variations in catch. Considering only BMUS on a short-term basis, total estimated catch decreased by 14% while the commercial landings decreased by 41%; this indicates that the majority of the BMUS catch was non-commercial. In relation to the short-term average presented, catch-per-unit-effort (CPUE) and bycatch from the bottomfish fishery each exhibited notable decreases. The amount of effort in the bottomfish fishery (measured in gear-hours) increased by 35% in 2017 relative to average values from the last decade, while the total number of participants increased by 106% compared to the short-term average. Coral reef fishery performance appeared to have mixed trends. The 2017 catch from the boat- based fisheries in American Samoa was 38% lower than the short-term average in continuing a decreasing trend over the past two decades. The shore-based coral reef fisheries had an estimated catch in 2017 that was 65% lower than the short-term average catch of the preceding 10-year increasing trend. The CPUE in the coral reef boat-based fisheries was higher in the mixed bottomfishing and trolling methods than in the spearfishing method over the same time period. Trolling CPUE had decreased 72% in 2017 in the midst of a 10-year increasing trend. The shore- based rod-and-reel fishery showed a lower estimated CPUE, whereas the spear, gleaning, and gill net fisheries had higher CPUE. Fishing effort values were lower this year for five coral reef fishery methods than the previous year; boat-based spear, trolling, and shore-based rod-and-reel each had a higher fishing effort than the short-term average. Data showed that shore-based hook- and-line effort had significantly decreased in 2017 to two total gear-hours (i .e. a 96% decrease). An ecosystem considerations section was added to the annual SAFE report following the Council’s review of its fishery ecosystem plans and revised management objectives. Fishery independent ecosystem survey data, human dimensions, protected species, climate and v Annual SAFE Report for the American Samoa Archipelago FEP Executive Summary oceanographic indicators, essential fish habitat, and marine planning information are included in the ecosystem considerations chapter. Fishery independent ecosystem survey data were acquired through visual surveys conducted in American Samoa, the Pacific Remote Island Areas, the Commonwealth of Northern Mariana Islands, Guam, the Main Hawaiian Islands, and the Northwest Hawaiian Islands; the data illustrate mean fish biomass for reef areas in these locations. Additionally, the mean reef fish biomass and mean size of fishes (>10 centimeters) found in American Samoa are presented by sampling year and reef area. Finally, reef fish population estimates for various study sites in American Samoa are provided for hardbottom habitat (0-30 meters). For American Samoa, life history parameters including maximum age, asymptotic length, growth coefficient, hypothetical age at length zero, natural mortality, age at 50% maturity, age at sex switching, length at which 50% of a fish species are capable of spawning, and length of sex switching are provided for several species of both coral reef fish and bottomfish. Several length- derived parameters for coral reef fish and bottomfish were also summarized and included: maximum fish length, mean length, sample size, sample size for L-W regression, and length- weight coefficients. Values for 23 species of reef fish and two species of bottomfish are presented for American Samoa. The socioeconomics section outlines the pertinent economic, social, and community information available for assessing the successes and impacts of management measures or the achievements of the Fishery Ecosystem Plan for the American Samoan Archipelago. It meets the objective “Support Fishing Communities” adopted at the 165th Council meeting; specifically, it identifies the various social and economic groups within the region’s fishing communities and their interconnections. The section begins with an overview of the socioeconomic context for the region, provides a summary of relevant studies and data for American Samoa, gives summaries of relevant data and studies for each American Samoan fishery, and concludes with available socioeconomic data. There were no new data reported for neither the crustacean nor the precious coral fisheries in the territory. Considering the American Samoan bottomfish fishery, the average cost for a bottomfishing trip was roughly $120, similar to 2016. For the coral reef fishery in the region, the average cost of a spearfishing trip was nominally cheaper than 2016 at $55. The protected species section of this report summarizes information and monitors protected species interactions in fisheries managed under the American Samoa FEP. These fisheries generally have limited impacts to protected species, and do