Email updates

Keep up to date with the latest news and content from BMC Neuroscience and BioMed Central.

This article is part of the supplement: Twentieth Annual Computational Neuroscience Meeting: CNS*2011

Open Access Poster presentation

Modeling phonotaxis in female Gryllus bimaculatus with artificial neural networks

Gundula Meckenhäuser12*, Matthias R Hennig3 and Martin P Nawrot12

Author Affiliations

1 Freie Universität Berlin, Berlin, Germany

2 Bernstein Center for Computational Neuroscience Berlin, Germany

3 Behavioural Physiology Group, Department of Biology, Humboldt-Universität zu Berlin, Berlin, Germany

For all author emails, please log on.

BMC Neuroscience 2011, 12(Suppl 1):P234  doi:10.1186/1471-2202-12-S1-P234

The electronic version of this article is the complete one and can be found online at: http://www.biomedcentral.com/1471-2202/12/S1/P234


Published:18 July 2011

© 2011 Meckenhäuser et al; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Poster presentation

Courtship songs are used by female Gryllus bimaculatus to assess the quality of their potential mating partner. Typically, a song consists of chirps composed of few pulses followed by a chirp pause (Figure 1A). In extensive behavioral experiments, phonotactic responses of female crickets were tested by varying song features such as duration of pulse, pulse-pause, pulse-period, etc. [1]. Although several features of the song have been determined to affect the attractiveness of a song, the exact mechanisms underlying the female’s evaluation process are yet unclear.

thumbnailFigure 1. (A) Temporal features of courtship songs: pulse duration, pulse period, chirp duration, chirp period. (B) Correlation between the model's phonotaxis and the female's phonotaxis evaluated for five fixed neural networks with 3 hidden neurons: Each color represents a network and each dot corresponds to a song.

Here, we present a feed-forward artificial neural network that quantitatively predicts the attractiveness of mating songs. Our approach was motivated by recent work from Wittmann et al. [2] who presented a network that analyzes and evaluates courtship songs of grasshoppers (Chorthippus biguttulus). We studied networks consisting of twelve neurons in the input layer, each one representing a feature of a given song, a variable number of n = 1, … , 15 neurons in the hidden layer and one output neuron that represents the phonotaxis. The neurons from one layer to the next are all-to-all connected via synaptic weights. The weights are trained with 160 artificial courtship songs for which the phonotaxis had already been determined in experiments. For training our networks, we used the backpropagation algorithm. We show that the mean squared error computed from a test set of 40 courtship songs is minimal for artificial neural networks with n = 3 hidden neurons. To estimate the predictive power of 3-hidden-neurons networks, we analyze the correlation between the model’s phonotaxis and the female’s phonotaxis. Figure 1B. shows phonotaxis values predicted by 3-hidden-neurons networks versus the values measured in experiments. Each color represents one fixed network. The best performing network yielded a mean squared error of 0.05. Thus, our model can be used for a quantitative prediction of the attractiveness of untested courtship songs and so it complements experimental testing of female phonotaxis in the laboratory.

Acknowledgement

This work is funded by the German Research Council (DFG) within the Collaborative Research Center Theoretical Biology (SFB 618).

References

  1. Hennig RM: Walking in Fourier's space: algorithms for the computation of periodicities in song patterns by the cricket Gryllus bimaculatus.

    J Comp Physiol A 2009, 196:971-987. Publisher Full Text OpenURL

  2. Wittmann JP: A neural network-based analysis of acoustic courtship signals and female responses in Chorthippus biguttulus grasshoppers.

    J Comput Neurosci 2010. PubMed Abstract | Publisher Full Text OpenURL