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Table 2 Statistical comparisons between field and laboratory recordings for male multiple-pulsed sounds from O. rochei

From: Sexual dimorphism of sonic apparatus and extreme intersexual variation of sounds in Ophidion rochei (Ophidiidae): first evidence of a tight relationship between morphology and sound characteristics in Ophidiidae

Variables Methods Results
Pulse number t-test N = 49, t(47) = 3.57, p < 0.05
Alternation start t-test N = 46, t(44) = −1.4, p > 0.05
Call duration t-test N = 49, t(47) = −1.15, p > 0.05
Short pulse period M-W U test N = 564, z = −14.98, p < 0.05
Long pulse period M-W U test N = 555, z = −15.19, p < 0.05
Pulse duration M-W U test N = 1742, z = −16.74, p < 0.05
1 st main frequency M-W U test N = 46, z = −2.52, p < 0.05
2 nd main frequency M-W U test N = 47, z = −2.67, p < 0.05
  1. T-test: the t-test of Student. M-W U test: U test of Mann–Whitney. Significance level is determined at p < 0.05.