2018 CDFW-CWPA CPS Aerial Survey 12 April 2019 PFMC April 2019 - - PowerPoint PPT Presentation

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Agenda Item E.3.a Supplemental CDFW Presentation 1 April 2019 2018 CDFW-CWPA CPS Aerial Survey 12 April 2019 PFMC April 2019 John Ugoretz / Kirk Lynn California Department of Fish and Wildlife Marine Region Overview Surveys

SLIDE 1

2018 CDFW-CWPA CPS Aerial Survey

PFMC – April 2019

John Ugoretz / Kirk Lynn

12 April 2019

California Department of Fish and Wildlife Marine Region

Agenda Item E.3.a Supplemental CDFW Presentation 1 April 2019

SLIDE 2

Overview

Surveys conducted since 2012
SSC conditionally approved, June 2017

– Focus on providing nearshore sardine and anchovy biomass shoreward of ATM – Validate observer estimates – Develop a variance estimate

2017 and 2018 surveys documented

significant nearshore abundance

– Observer estimates good and err on low side – Data being collected for variance estimate

SLIDE 3

2018 Aerial Survey – S CA (Apr-May)

Total Observed Biomass (mt):

Sardine – 4,464 Anchovy – 587

SLIDE 4

2018 Aerial Survey – S CA (Sep)

Total Observed Biomass (mt):

Sardine - 496 Anchovy – 29

SLIDE 5

2018 Aerial Survey – N CA (Oct)

Total Observed Biomass (mt):

Sardine – 13,473

(~49% entire population estimate)

Anchovy – 62,438

SLIDE 6

2018 Aerial Survey – N CA (Oct)

Sardine schools off Lucia, CA 10/13/18 4,620 mt (~17% entire population estimate)

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CPS Survey Comparisons

Offshore - Vancouver to Morro Bay Jun-Aug 14,103 153,460 Nearshore (extrapolation) - Vancouver to Morro Bay Jun-Aug 146 45,446 Offshore - Vancouver to Mexico Jun-Sep 25,148 723,826 Nearshore (extrapolation) - Vancouver to Mexico Jun-Sep 308 4,110 N CA - Pt Arena to Morro Bay (419 miles) August 18,118 67,684 N CA - Big Sur (79 miles) October 13,473 62,438 S CA - SCB (492 miles) Mar-Apr 4,464 587 S CA - SCB (SSP*, 472 miles) Sep 496* 29 DEPM San Francisco to San Diego Mar-Apr

308,173
Aerial

Survey Method Area Time AT

Biomass Estimates (mt)

Sardine (NSP) Anchovy (CSNA) 2017 2018 2017 2018

SLIDE 8

Observer Accuracy

Observer estimates very good (R2 > 0.90)

SLIDE 9

2018 NCS Data – Point Sets

Significant numbers of age 0, 1, and 2 fish

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Summary

Significant nearshore sardine abundance

compared to ATM estimates

Preliminary results indicate utility of aerial

estimates

2019 surveys will coordinate with ATM in

time and location

Review during 2020 STAR for potential use

in assessment

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