01489nas a2200145   4500008004100000245012200041210006900163260001600232300001200248490000700260520096100267100002401228700002201252856006901274       1986                        eng d00aConfusion of Phonotaxis by Masking Sounds in the Bushcricket Conocephalus brevipennis (Tettigoniidae: Conocephalinae)0 aConfusion of Phonotaxis by Masking Sounds in the Bushcricket Con  cDec-01-1986  a19 - 280 v733 a<p>Female Conocephalus brevipennis, executing phonotaxis to the call of a conspecific male broadcast from a speaker, were subjected to varying levels of background sound so as to progressively mask the attracting signal. The background consisted of either random noise or the call of a sympatric congener, C. nigropleurum and was delivered from above the orienting female. Disruption of phonotaxis was assayed by monitoring the angular dispersion of the female&#39;s exit path from the arena, relative to the position of the conspecific call. Random noise significantly interfered with phonotaxis when it was within 2 dB of the conspecific call intensity, both signals measured at the centre of the arena. The equivalent effect of the call C. nigropleurum was 5 dB above conspecific call intensity. The implication of signal loss within background noise is discussed as are the possible interactive behaviours of competing sympatric syntopic species.</p>
1 aBailey, Winston, J.1 aMorris, Glenn, K.  uhttp://blackwell-synergy.com/doi/abs/10.1111/eth.1986.73.issue-1