Seasonal characteristics of fin whale song.

The total number of marked calls, as well as the October, December, and February song IPIs and median absolute deviation (in parentheses) are presented, with short IPIs shown before the/and long IPIs after. IPIs from song segments consisting of only short IPIs or with an intermittent series of short IPIs (mixed IPI songs) are included in calculation of short IPI for each month. Monthly change in IPI was calculated from October, or the first month with song if later, to February, or the last month with song if earlier.* Although fin whale song was recorded in March of 2006, no song was evident in February, 2006.Seasonal characteristics of fin whale song.