427
15.3.6.2 Tide
Even dividing the tidal states into time similar categories, and apparently diverse in
the frequency distribution (Fig. 15.20), the Chi-Square test showed no statistical
differences between singer male occurrence in the tidal classes (Chi-Square 5% =
11,55,556; df = 7; p = 0,12).
Fig. 15.18 Spectrogram exemplifying multiple male singing of the humpback whale (Megaptera
novaeangliae), characterized by simpler parts of the song, in their breeding area off Northeastern
Brazil (different colors exemplify different singers)
Fig. 15.19 Frequency (number of sightings) of humpback whale groups with singer males in different depth range, between 2005 and 2009, in the North Coast, Brazilian breeding ground
15 The Spreading Message in a Noisy World: Song Behavior and Acoustic Ecology…
15.3.6.2 Tide
Even dividing the tidal states into time similar categories, and apparently diverse in
the frequency distribution (Fig. 15.20), the Chi-Square test showed no statistical
differences between singer male occurrence in the tidal classes (Chi-Square 5% =
11,55,556; df = 7; p = 0,12).
Fig. 15.18 Spectrogram exemplifying multiple male singing of the humpback whale (Megaptera
novaeangliae), characterized by simpler parts of the song, in their breeding area off Northeastern
Brazil (different colors exemplify different singers)
Fig. 15.19 Frequency (number of sightings) of humpback whale groups with singer males in different depth range, between 2005 and 2009, in the North Coast, Brazilian breeding ground
15 The Spreading Message in a Noisy World: Song Behavior and Acoustic Ecology…