Skip to main content

Table 1 Sex ratio (male/female) of Ucides cordatus in each mangrove forest with different predominant tree species (L, Laguncularia racemosa; A, Avicennia schaueriana; and R, Rhizophora mangle), flooding level (Lh less-flooded; Ll more-flooded), and biological period (NB non-breeding season; B breeding season), in Iguape Municipality, State of São Paulo, southeast Brazil

From: Mangrove habitat partitioning by Ucides cordatus (Ucididae): effects of the degree of tidal flooding and tree-species composition during its life cycle

Biological periods/mangrove forests Males Females Sex ratio (M:F) χ²
N  % N  %
Non-breeding (NB)       
Lh 191 77.6 55 22.4 1:0.29 75.18***
Ll 132 58.7 93 41.3 1:0.70 6.76*
A 92 40.5 135 59.5 1:1.47 8.14*
R 95 42.2 130 57.7 1:1.37 5.44*
Breeding (B)       
Lh 206 66.9 102 33.1 1:0.49 35.11***
Ll 152 48.3 163 51.7 1:1.07 0.38ns
A 140 55.8 111 44.2 1:0.80 3.35ns
R 98 39.7 149 60.3 1:1.52 10.53*
Total (NB + B)       
Lh 397 71.7 157 28.3 1:0.39 193.97***
Ll 284 52.6 256 47.4 1:0.90 1.45ns
A 232 48.5 246 51.5 1:1.06 0.41ns
R 193 40.9 279 59.1 1:1.44 15.66***
Total 1.106 54.1 938 45.9 1:0.85 13.81**
  1. χ2 test of goodness of fit testing the null hypothesis of equal proportions between sexes for each area; * P < 0.05; ** P < 0.01; *** P < 0.001; ns P > 0.05