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Table 2 Mean joint isolation indexes (±SD: standard deviation), for the frequency of mating encounters (I f = (number of homotypic encounters − number of heterotypic encounters) × total number of encounters−1) and time spent in mating encounters (I t = (time spent in homotypic encounters − time spent in heterotypic encounters) × total time spent in encounters−1) between individuals of M. gregaria

From: Absence of a prezygotic behavioural barrier to gene flow between the two sympatric morphs of the squat lobster Munida gregaria (Fabricius, 1793) (Decapoda: Anomura: Galatheidae)

 

I f ± SD

P

I t ± SD

P

Treatment 1 (CL ♂ ≈ ♀)

0.002 ± 0.667

0.49

0.02 ± 0.76

0.40

Treatment 2 (CL ♂ > ♀)

0.03 ± 0.78

0.39

0.02 ± 0.91

0.44

  1. P: significance level of Student's t tests used to test the Ha: I > 0. Treatment 1: males and females of similar sizes. Treatment 2: males on average 30% carapace length (CL) larger than females