Abstract
1. The back swimmerNotonecta glauca discriminates between prey and nonprey (including conspecifics) by means of surface waves. Waves generated by aquatic, semiaquatic, and terrestrial insect prey of the back swimmer were recorded and analyzed. Their relative spectra were statistically compared with those of waves elicited during ‘swimming,’ ‘diving,’ ‘emerging,’ ‘turning,’ ‘grooming,’ or ‘paddling’ by adult back swimmers, with swimming waves of back-swimmer larvae I–V, and with ‘noise’ caused by the fall of inanimate objects on to the water surface. 2. Waves from almost all these sources include amplitudes above the vibration sensitivity threshold ofNotonecta. Since absolute amplitudes vary strongly within all wave types and depend on the distance between wave emitter and receiver, they cannot be used byNotonecta to discriminate between wave types. 3. It is concluded thatNotonecta discriminates wave types according to their frequency ranges. With respect to this, the investigated surface waves may be classified into three different groups:
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.