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Blue Crab Update to LivRaw

Blue Crab Update to LivRaw. Derek M. Orner NOAA Chesapeake Bay 4 November 2005. Trends in Blue Crab: Mature Females. GOAL: To protect the health of the blue crab stock and maintain the spawning stock at a sustainable level.

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Blue Crab Update to LivRaw

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  1. Blue Crab Update to LivRaw Derek M. OrnerNOAA Chesapeake Bay4 November 2005

  2. Trends in Blue Crab: Mature Females GOAL: To protect the health of the blue crab stock and maintain the spawning stock at a sustainable level. STATUS:Mature female abundance has been below the long-term average for seven straight years and eleven of the past twelve years. Abundance declined in 2004 after trending upwards for three straight years from an historic low in 2000. Spawning Stock Abundance Average VIMS Trawl, Calvert Cliffs, MD Trawl & Winter Dredge VIMS Trawl, Calvert Cliffs & MD Trawl VIMS Trawl & Calvert Cliffs Sources: MD Department of Natural Resources, Virginia Institute of Marine Science, Academy of Natural Science, NOAA CBSAC.

  3. Trends in Blue Crab: Juveniles Age O (<60mm) Indices GOAL: Manage blue crabs to conserve the Baywide stock, protect its ecological value and optimize the long-term use of the resource. STATUS:It appears that recruitment continued to improve in 2004. The number of juvenile blue crabs entering the Chesapeake Bay population has stayed within ‘normal’ bounds for 12 straight years. Average VIMS Trawl, Calvert Cliffs, MD Trawl & Winter Dredge VIMS Trawl, Calvert Cliffs & MD Trawl VIMS Trawl & Calvert Cliffs Sources: MD Department of Natural Resources, Virginia Institute of Marine Science, NOAA CBSAC.

  4. Trends in Blue Crab: Commercial Harvest GOAL:Manage blue crabs to conserve the Baywide stock, protect its ecological value and optimize the long-term use of the resource. STATUS: The 2004 harvest of approximately 60 million pounds is below the long term average and near historic lows. The 2004 fishing mortality rate did not exceed the overfishing threshold but is above the target. Chesapeake Bay Blue Crab Landings Average Fishing Mortality Rate Threshold: Not to be exceeded Target: Safe Harvest Level Sources: Landings - National Marine Fisheries Service, NOAA.. Fishing Mortality Rate - Chesapeake Bay Stock Assessment Committee (CBSAC), unweighted average of 4 surveys.

  5. Adopted Control Rule -Blue Crab fisheries From: Miller et.al. Stock Assessment of the Blue Crab in Chesapeake Bay 2005

  6. http://hjort.cbl.umces.edu/crabs/Assessment05.html

  7. From: Miller et.al. Stock Assessment of the Blue Crab in Chesapeake Bay 2005

  8. From: Miller et.al. Stock Assessment of the Blue Crab in Chesapeake Bay 2005

  9. Current AR 1999 -2005 Planned AR 2006+

  10. WDS – harvest relationship From: Miller et.al. Stock Assessment of the Blue Crab in Chesapeake Bay 2005

  11. Blue Crab Distribution Winter 1990/1991 Winter 2001/2002 From: Miller et.al. Stock Assessment of the Blue Crab in Chesapeake Bay 2005

  12. From: Miller et.al. Stock Assessment of the Blue Crab in Chesapeake Bay 2005

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