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Table 1 Sex ratio of the studied C. gigas populations (20 oysters per month and per site)

From: Gametogenic cycle of Crassostrea gigas in contrasting Mediterranean habitats: marine (Gulf of Tunis) and continental (Bizert lagoon) culture sites

Months PP FMB
  Male Female Ratio males/females Male Female Ratio males/females
May 2005 12 8 1.5 12 8 1.50
June 2005 14 6 2.33 14 6 2.33
July 2005 15 5 3.00 16 4 4.00
August 2005 17 3 5.67 10 10 1.00
September 2005 10 10 1.00 12 8 1.50
October 2005 - - - 10 10 1.00
November 2005 - - - 12 8 1.50
December 2005 - - - 11 9 1.22
January 2006 - - - 6 14 0.43
February 2006 11 9 1.22 8 12 0.67
March 2006 16 4 4.00 7 13 0.54
April 2006 10 10 1.00 16 4 4.00
May 2006 12 8 1.50 15 5 3.00
June 2006 12 8 1.50 9 11 0.82
July 2006 13 7 1.86 7 13 0.54