N.C. OYSTER STOCK STATUS. Manage by fishery management plans Assess overfishing and overfished status Stock Assessment

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1 istorical andings

2 N.C. OYSTER STOC STATS Manage by fishery management plans Assess overfishing and overfished status Stock Assessment

3 OYSTER STOC ASSESSMENT Classic stock assessments methods not available for oysters due to life history characteristics and problems with age determination New Mg/Ca ratio methods for ageing

4 OTER ASSESSMENT METOS se independent indices for stock status Too few indices to assess oysters

5 ANINGS? andings in Bushels andings Catch per Trip Nov ec Oct Nov ec Nov ec Nov ec Nov ec Nov ec Bushels per Trip Market, weather, pollution closures, rule changes, other fisheries

6 Percent of Trips Reaching the Trip imit - Overfishing Percent of Trip imit 2 Bay River Bogue Sound Cape Fear River 2 16 Core Sound Inland aterway ockwood Folly Masonboro Sound Neuse River New River Newport River Fishing Year Fishing Year

7 OVERFISE? No quantitative assessment se a qualitative assessment Oysters continue to be impacted by water quality and habitat loss and disease concerns Status = concern

8 e are not alone Only three states have quantitative stock assessments: Maryland, Virginia and elaware One of three states managing oysters using a fishery management planning system: elaware, Texas and North Carolina

9 hat is the alternative? Oyster Bar (rock) surveys Maryland, Virginia, elaware and Texas Requires information on the location, size and population parameters of the oyster habitat throughout the state

10 Shellfish and abitat Mapping Program objectives: 1. ocate and map shellfish producing areas, and Submerged Aquatic Vegetation (SAV). 2. elineate potentially productive bottom. 3. etermine shellfish concentrations and abundance within productive bottom types by a stratified random sampling scheme. 4. uantify habitat types.

11 Methodology I G G G NM NM G G R R S NM S G NM R R R NM R NM NM R R G 76 45'" 76 46'" 34 43'"N A - Subtidal Soft Vegetated Shell B - Subtidal Soft Vegetated w/o Shell C - Subtidal Soft Non-vegetated Shell - Subtidal Soft Non-vegetated w/o shell E - Subtidal Firm Vegetated Shell F - Subtidal Firm Vegetated w/o Shell G - Subtidal Firm Non-vegetated Shell - Subtidal Firm Non-vegetated w/o Shell I - Subtidal ard Vegetated Shell - Subtidal ard Vegetated w/o Shell - Subtidal ard Non-vegetated Shell - Subtidal ard Non-vegetated w/o Shell M - Intertidal Soft Vegetated Shell N - Intertidal Soft Vegetated w/o Shell O - Intertidal Soft Non-vegetated Shell P - Intertidal Soft Non-vegetated w/o Shell R - Intertidal Firm Vegetated w/o Shell S - Intertidal Firm Non-vegetated Shell T - Intertidal Firm Non-vegetated w/o Shell - Intertidal Firm Vegetated Shell V - Intertidal ard Vegetated w/o Shell - Intertidal ard Non-vegetated Shell - Intertidal ard Non-vegetated w/o Shell - Intertidal ard Vegetated Shell Shellfish Mapping Strata

12 Sampling ata ensity and size class data for all oysters, clams and scallops ater temp, salinity, dissolved oxygen for both surface and bottom of sample atitude and longitude for samples Substrate composition and characteristics Submerged aquatic vegetation species and density class

13 Mapping Efforts

14 Mapping Efforts

15 eepwater Mapping Effort Pamlico Sound 92, Acres of eepwater (>15 feet) Areas in Pamlico Sound nmapped

16 NOAA/ NOS Special Projects / O ffice ofco as t Surve y 5 eepwater Mapping Effort

17 Remote Sensing of Benthic abitat se of side scan sonar and other remote sensing techniques to map, classify and quantify oyster habitat on: Oyster sanctuaries Selected cultch planting sites Selected natural deep water oyster rock locations