Cardiosoma armatum Cardiosoma guanhumi Chi-Square Significant Level
  Female Male Sex ratio Female Male Sex ratio
February 26 30 1:1.15 26 30 1:1.15 0.147
March 29 33 1:1.14 29 33 1:1.14 0.997
April 33 37 1:1.12 33 37 1:1.12 0.015
May 31 38 1:1.22 31 38 1:1.22 0.835
June 39 39 1:1 39 39 1:1 0.794
July 39 44 1:1.12 39 44 1:1.12 0.850
Table 6: Sex Ratio of Cardiosoma armatum and Cardiosoma guanhumi from the Lagos Lagoon mangrove swamps (February- July, 2012).