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| EASTERN OYSTER (06/08 NCDMF) Stock Status - Concern- Long term decline caused by over harvesting and habitat disturbances. Sampling data shows DERMO has declined in recent years and commercial landings have shown some improvement. Recreational landings are unknown. Average Commercial Landings and Value 1998-2007 – 304,035 lbs. of meat/$1,343,176 2007 Commercial Landings and Value – 439,082 lbs. of meat/$2,232,763 Average Recreational Landings 1998-2007 – unknown, 2007 - unknown Status of Fisheries Management Plan (FMP) - A state FMP was adopted August 2001 by the N.C. Marine Fisheries Commission. Recommendations are currently being implemented. The FMP was amended in 2003 to change the criteria for mechanical harvest methods only. Amendment 2 of the FMP is in development and scheduled for completion in 2008. Research and Data Needs – habitat size and location; oyster density within habitat; fishing mortality and substrate disturbance caused by different harvest techniques; Catch-Per-Unit-Effort (CPUE) data; parasite: life history, means of transmission, and possible control methods; effects of pollutants; effects of bottom disturbing fishing gear; accurate landing data for commercial and recreational harvest from public and private bottom Current Minimum Size Limit – 3-inch shell length Harvest Season - Open season October 15 through May 15, DMF director may impose any or all of the following restrictions:
Size and Age at Maturity- 2-inch shell length/4 weeks-12 weeks after settlement. Historical and Current Maximum Age - 40 years old/unknown Juvenile Abundance Indices Average 1998-2007=1.30, 2007=1.89
Habits and Habitats — Oysters are bivalve mollusks residing in intertidal or subtidal estuarine environments. A relatively clean firm substrate where water circulation provides sufficient food is necessary for oysters to attach, survive and grow to market size (3 inches). Optimal salinity and temperature ranges are 12 to 25 ppt. and 10 to 16° C (50 to 79° F) respectively. Spawning is triggered by increases in temperature (> 20° C), and salinity (>10 ppt.) and occurs in North Carolina from May through September. For more information, please contact Clay Caroon at clay.caroon@ncmail.net (phone 800-682-2632 or 252-726-7021). |
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