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).