NMFS Report SWFSC Activities Highly Migratory Species Gerard - PowerPoint PPT Presentation

Agenda Item J.1.b Supplemental SWFSC Presentation 1 March 2019 NMFS Report SWFSC Activities Highly Migratory Species Gerard DiNardo Director, Fisheries Resources Division Southwest Fisheries Science Center

Presentation Outline • Highly Migratory Species (HMS) Biological Research • HMS Management Tools • HMS Stock Assessment Schedule • HMS Meetings/Workshops

PBF Biological Sampling 2017 2018 Total Year 2008 2009 2010 2011 2012 2013 2014 2015 2016 421 493 2327 78 75 54 189 294 171 156 120 276 Number • 2018: Fish collected from 14 - 364 lbs • No sign of spawning or gonadal development in larger fish

PBF Foraging Ecology (2008-2018) Important Prey Species by Year 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Northern Anchovy Fish Jack Makerel Myctophidae Pacific Mackerel Pacific Saury Sebastes spp Sardine Cephalopods Crustaceans Pelagic Red Crab

PBF Recreational Catch Size Sampling • 4024 bluefin measured from long- and short-range CPFV trips (2013-2018) • 2018 larger fish continued to be caught (up to 364 lbs) (n= 379) 2018 16 14 12 10 Frequency 8 6 4 2 0 100 103 106 109 112 118 121 125 128 132 135 152 155 159 162 165 168 171 174 177 183 193 59 63 66 69 73 79 82 85 88 91 94 97 Fork length (cm)

Bluefin Recreational Catch Size Sampling 1,732 samples; 74 trips; July-Sep. 2014 age 2 age 2 100 492 samples from 32 trips; June- Sep. 90 range 56.0-165.1 cm FL; average 87.44 cm; age class 1-6 2015 *Mexican PBF closure in place for all 2015 and U.S. bag 80 age 1 age 1 limit reduced from 10 to 2 fish/day 70 775 samples from 68 trips; April- Sep. 2016 range 60.5 -184.3 cm FL; average 102.9 cm; age class 1-7 60 Frequency 349 samples from 47 trips; May-December 50 age 3 age 3 2017 range 46.1 -210.2 cm FL; average 106.8 cm age class 1-10 40 30 2018 379 samples age 5 age 5 age 4 age 4 age 6 20 age 7 10 age 10 0 46 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 101 103 105 107 109 111 113 115 117 119 121 123 125 127 129 131 133 135 137 139 141 143 145 147 149 151 153 155 157 159 161 163 165 167 169 171 173 175 177 180 183 192 210 Fork length (cm) 6

PBF SWFSC-NRIFSF Joint Bluefih Tuna Research Chemical Tracers (Otoliths and Tissue) Goal: Quantify dynamics of Bluefin movements across the Pacific using otolith and tissue microchemistry Progress to date Natal core 1. Established collaboration with Japan Transect 2. Identified signature for foraging in the eastern Pacific 3. Identified distinct signature for two spawning grounds Next Steps 1. Using transect across otolith determine relative contribution of eastern fish Juveniles to spawning stock biomass Adults 2. Determine patterns in recruitment to eastern Spawning Juveniles Pacific Adults Migration

PBF SWFSC-NRIFSF Joint Research Chemical Tracers (Otoliths and Tissue) 85% 75% Results demonstrate the ability to determine natal spawning ground and the importance of year class matching. Assignment should be improved with higher sample sizes. Working being done in collaboration with Texas A&M. 75% 90% Natal core 95%

Albacore Distribution Modeling • Boosted regression trees built using surface fishery logbook data, and environmental data from ROMS/satellites • Example results from August show interannual variability in southward habitat extent for albacore • Distribution models also built for major prey species (anchovy, sardine, hake, boreal clubhook squid) August 2004 August 2012 August 2015 45 Observed Predicted fish/vessel day fish/vessel da (log) (log) 1.0 2.0 3.0 40 Tagged fish location 35 30 -135 -130 -125 -120 -115 -135 -130 -125 -120 -115 -135 -130 -125 -120 -115 For more on ROMS: Moore et al. 2013, Neveu et al. 2016

Opah: Biological Sample Program with COP Goal: Characterize life history parameters Progress to date: 1) Collected 167 biological samples/ 791 genetic samples 2) Identified actively spawning individuals Next Steps: 1) Better characterize reproductive biology 2) Develop methods for age and growth 3) Determine species distribution 4) Characterize foraging ecology Gonad wt vs Month 3000 2500 Gonad wt (gm) 2000 1500 1000 500 0 0 2 4 6 8 10 12 14 Month 10

HMS Management Tools North Pacific Albacore Tuna • MSE Webinar (preparatory discussion) – Feb. 13, 2019 ( Agenda Item J.2, Suppl. Att. 4 ) • MSE Workshop – March 5-7, 2019 ( Final Report Forthcoming ) • NO MAJOR MANAGEMENT DECISIONS (MSE MESSAGE STILL CONFUSING) refinement of management objectives and levels of risk • discussed pros & cons of managing based on catch or effort (TAC or TAE) • • exploring different harvest strategies (or HCR) Next Round of MSE Testing Completed in 2020

HMS Management Tools Pacific Bluefin Tuna • WCPFC-NC 2017 – ISC Requested to Conduct MSE Starting in 2019 1 st MSE Workshop – May 2018 Yokohama JPN • 2 nd MSE Workshop – May 20-21, 2019 (Tom Ham’s Lighthouse, San Diego, CA) • U.S. PBF Stakeholders Meeting (WCRO/SWFSC) – May 2, 2019 (SWFSC & Long Beach • Fed. Building) • WCPFC-NC 2019 – Final Decision

HMS Stock Assessment Schedule 2019 • North Pacific Striped Marlin (B) 2020 North Pacific Albacore Tuna (B) • • Pacific Bluefin Tuna (B) • Pacific Blue Marlin (U)

HMS Meeting/Workshop Schedule 2019 • ISC PBF Close-Kin Workshop – March 16-17, 2019 Jeju, Korea • ISC PBFWG Workshop – March 18-22, 2019 Jeju, Korea • U.S. PBF Stakeholders Meeting – May 2, 2019 (SWFSC & Long Beach Fed. Building) ISC19 July 9-15, 2019 Taipei, Taiwan • • HMS Fishery Dependent Monitoring Workshop – SWFSC TBD • HMS Research Coordination Workshop (NP Albacore & PBF tuna focus) – SWFSC TBD 2020 • ISC20 – U.S.

Thank You Questions? Thank You