Affiliation:
1. Departamento de Neurociencias Integrativas y Computacionales, Instituto de Investigaciones Biológicas Clemente Estable, Av. Italia 3318, Montevideo, Uruguay
Abstract
SUMMARYWe examined non-linear effects of the presence of one object on the electric image of another placed at the foveal region in Gymnotus omarorum. The sensory consequences of object mutual polarization on electric images were also depicted using behavioral procedures. Image measurements show that objects whose electric image is not detectable may modify the electric image of another placed closer to the fish and suggest that detection range and discrimination parameters used for one object may be affected when the presence of others enriches the scene. Behavioral experiments confirm that these changes in object images resulting from mutual polarization may be exploited for improving perception. While conductive objects close to the skin allow the fish to detect other objects placed out of the active electrodetection range, non-conductive objects may hide objects that otherwise show clear electric images. This suggests that fish movements may orient the self-generated field to exploit object mutual polarization, increasing or decreasing the active electrolocation range. In addition, images of a nearby object may be modulated by the presence of another object placed outside the detection range and the corresponding behavioral responses suggest that a moving or impedance-changing context may modify a fish’s discrimination abilities for closer objects.
Publisher
The Company of Biologists
Subject
Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics
Reference30 articles.
1. Electroreception in G. carapo: detection of changes in waveform of the electrosensory signals;Aguilera;J. Exp. Biol.,2003
2. Modeling the electric field of weakly electric fish;Babineau;J. Exp. Biol.,2006
3. Spatial acuity and prey detection in weakly electric fish;Babineau;PLoS Comput. Biol.,2007
4. Mind the gap! Detection of gaps and locomotor strategies of electrolocating Gnathonemus petersii;Behr;Proceedings of the 104th Annual Meeting of the Deutsche Zoologische Gesellschaft (DZG),2011
5. Electric organs;Bennett,1971
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献