The Mating Call of Isoperla bipartita Aubert, 1962 (Plecoptera,Perlodidae).

The mating call of Isoperla bipartita is described. The male callis composed of 3–10 groups, each of 1–4 rubs. The times betweenrubs average 89.52 msec (between first and second), 43.52 msec (between secondand third) and 35.28 msec (between third and fourth). The time between twogroups averages 180.75 msec and varies from 142 to 290 msec. The female answeris composed of a beat and rub repeated at 479.09 msec intervals on averageand interspersed between the male call groups between 94 and 184 msec (mean= 118.11 msec) after the last rub of the male group. The I. bipartita call can be considered as a ‘complex and modified pattern’because the male produces calls of 1–4 rubs by group and the femaleanswers overlapping the male call by percussion-rubbing-produced signals.Moreover, it is different from other studied Iberian Isoperla calls,being probably a species-specific behavioural pattern. [ABSTRACT FROM AUTHOR]