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04 5Yrrptoverview OAC 2017Jan09.Pdf Presentation for Oyster Advisory Commission: January 9, 2017 Review of the Five Year Oyster Review Report 1 Presentation for Oyster Advisory Commission: January 9, 2017 Presentation Outline • Appendix A – Sanctuary Areas • Appendix B – Public Fishery (NOAA Code Harvest) Areas (The information in the appendices are utilized in chapters 4 and 5 of the report) • Chapter 4 • Results towards meeting objectives of each management area type • Chapter 5 • Metrics used to develop tiers • Tier results • Future alternatives for tiers 2 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A - Sanctuaries Information included: • Acreage • Salinity region • Map of area: oyster bars, Fall Survey Oyster Dredge sample sites, MDE conditional and restricted areas • Bottom Survey – Bay Bottom Survey (1974-1983) and more recent side sonar surveys • Replenishment and restoration planting activities • Oyster population information • Annual Fall Survey Oyster Dredge • Number of spat, smalls, and markets • Oyster size structure • Oyster biomass • Mortality • Disease – Dermo and MSX • Patent Tong Population Survey • Density of live oysters • Oyster size structure • Shell volume • Harvest prior to becoming a sanctuary • Water quality information 3 MDE = Maryland Department of the Environment Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Only presented information collected in the area that is now established as a sanctuary regardless of past designation Overview map shows: • Sanctuary boundary • Historic, charted bars • MDE Shellfish Areas • Fall Survey sample sites • Regular samples • “Key” bar samples 4 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Bay Bottom Survey Maps Maps shows: • Surveyed bottom (green/tan areas) • Extent of oyster bottom (green areas) 5 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Table showing planting activities in the area: • Replenishment plantings for fishery prior to the area becoming a sanctuary • Restoration plantings after becoming a sanctuary • Main activity types include: fresh shell, dredged shell, hatchery spat-on-shell, & natural wild seed Planting activities occurring since 1990 in the area now established as the Wye Sanctuary in 2010. Thousands Planting Substrate Area Planted of Bushels Millions of Spat Year Type (acres) Planted Planted 1990 Wild Seed 23.8 11.23 - 1998 Wild Seed 12.9 8.81 - 2001 Fresh Shell 10.9 62.75 - Marylanders Grow Oysters Activity • 2016: 100 cages, 30,000 oysters planted 6 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Average number of oysters per bushel per size class since 1990 (Fall Survey) 244 ± 70 391 ± 207 Black line denotes when the sanctuary was established 7 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Density of oysters from patent tong population survey Restoration criteria: Minimum Threshold > 15 oysters/m2 yellow circles Target Goal > 50 oysters/m2 red circles 2014 oyster density in the Wye River Sanctuary Patent Tong Population Survey 8 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Shell volume and live oyster density 9 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Annual oyster size structure – shell height distribution Frequency of oysters oysters of(%) Frequency Frequency of oysters oysters of(%) Frequency Shell Height (mm) Shell Height (mm) • All size classes • Few size classes • Spat present = new recruitment • No spat present • Smalls present = past recruitment • Few small oysters present • Larger oysters = increased egg • Larger oysters = increased egg production production 10 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Annual biomass Larger sized oysters have higher biomass High biomass could be due from: • Lots of small oysters • Very large oysters • Combination of both 11 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Annual mortality • Based on small and market sized oysters • Includes both old boxes and recent boxes • 23.3% = baywide 31yr average mortality Box = dead oyster with the two shells still attached together 12 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example 30 oysters are tested for disease (“key” oyster bars samples only) Chart showing Dermo prevalence and intensity: • Prevalence = if oyster has the parasite • Intensity = how severe is the infection Chart showing MSX prevalence 13 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix A – Wye River Sanctuary Example Harvest over time Harvest reported by NOAA Code Area Buy Tickets = • Harvest reported by dealers Harvest Reports = • Harvest reported by watermen • Started in 2009 The Wye River Sanctuary encompasses 54% of the 6,493 acres in NOAA Code 099, however all oysters bars are located in the sanctuary with the exception of one (90% of the historic oyster bottom within NOAA Code 099 is located in the sanctuary). 14 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Public Fishery Areas Information included: • Acreage • Salinity region • Map of area: oyster bars, Fall Survey Oyster Dredge sample sites, MDE conditional and restricted areas, Public Shellfish Fishery Areas (PSFA – where no aquaculture leasing can occur) • Replenishment planting activities • Oyster population information • Annual Fall Survey Oyster Dredge • Number of spat, smalls, and markets • Oyster size structure • Oyster biomass • Mortality • Disease – Dermo and MSX • Harvest • No bottom survey or patent tong population survey 15 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Information presented by NOAA Code Harvest Areas: • 39 areas • Codes used when reporting harvest Overview map shows: • NOAA boundary • Sanctuary areas • Historic, charted bars • MDE Shellfish Areas • PSFA • Fall Survey sample sites • Regular samples • “Key” bar samples 16 PSFA = Public Shellfish Fishery Areas Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Table showing planting activities in the area: • Replenishment plantings for fishery • Main activity types include: Fresh shell, dredged shell, hatchery spat-on-shell, & natural wild seed Replenishment planting activities occurring since 1990 in NOAA Code 043 (Fishing Bay). Planting Substrate Area Planted Thousands of Millions of Spat Year Type (acres) Bushels Planted Planted 1990 Dredged Shell 19.5 79.8 - 1990 Fresh Shell 1.5 2.0 - 1991 Wild Seed 6.7 2.3 - 1992 Wild Seed 38.9 12.7 - 1996 Dredged Shell 26.3 43.4 - 2001 Wild Seed 8.6 5.1 - 2013 Fresh Shell 6.0 11.9 - 2014 Fresh Shell 20.0 20.2 - 2014 Hatchery Spat-on-Shell 8.7 - 19.0 2015 Fresh Shell 14.7 20.4 - Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Average number of oysters per bushel per size class since 1990 (Fall Survey) 18 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Annual oyster size structure – shell height distribution Frequency of oysters oysters of(%) Frequency Frequency of oysters oysters of(%) Frequency Shell Height (mm) Shell Height (mm) • All size classes • Few size classes • Spat present = new recruitment • No spat present • Smalls present = past recruitment • Few small oysters present • Larger oysters = increased egg • Larger oysters = increased egg production production 19 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Annual biomass Larger sized oysters have higher biomass High biomass could be due from: • Lots of small oysters • Very large oysters • Combination of both 20 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Annual mortality • Based on small and market sized oysters • Includes both old boxes and recent boxes • 23.3% = baywide 31yr average mortality Box = dead oyster with the two shells still attached together 21 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example 30 oysters are tested for disease (“key” oyster bars samples only) Chart showing Dermo prevalence and intensity: • Prevalence = if oyster has the parasite • Intensity = how severe is the infection Chart showing MSX prevalence 22 Presentation for Oyster Advisory Commission: January 9, 2017 Appendix B – Fishing Bay (NOAA Code 043) Example Harvest over time Buy Tickets = • Harvest reported by dealers Harvest Reports = • Harvest reported by watermen • Started in 2009 23 Presentation for Oyster Advisory Commission: January 9, 2017 Presentation Outline • Appendix A – Sanctuary Areas • Appendix B – Public Fishery (NOAA Code Harvest) Areas (The information in the appendices are utilized in chapters 4 and 5 of the report) • Chapter 4 • Results towards meeting objectives of each management area type • Chapter 5 • Metrics used to develop tiers • Tier results • Future alternatives for tiers 24 Presentation for Oyster Advisory Commission: January 9, 2017 Purpose of the Report “The department has committed to reviewing the effectiveness
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