Abstract
The polarization of light provides information that is used by many animals for a number of different visually guided behaviours. Several marine species, such as stomatopod crustaceans and cephalopod molluscs, communicate using visual signals that contain polarized information, content that is often part of a more complex multidimensional visual signal. In this work, we investigate the evolution of polarized signals in species of Haptosquilla, a widespread genus of stomatopod, as well as related protosquillids. We present evidence for a pre-existing bias towards horizontally polarized signal content and demonstrate that the properties of the polarization vision system in these animals increase the signal-to-noise ratio of the signal. Combining these results with the increase in efficacy that polarization provides over intensity and hue in a shallow marine environment, we propose a joint framework for the evolution of the polarized form of these complex signals based on both efficacy-driven (proximate) and content-driven (ultimate) selection pressures.
Original language | English (US) |
---|---|
Pages (from-to) | 3425-3431 |
Number of pages | 7 |
Journal | Journal of Experimental Biology |
Volume | 217 |
Issue number | 19 |
DOIs | |
State | Published - Oct 1 2014 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2014. Published by The Company of Biologists Ltd.
Keywords
- Mantis shrimp
- Multi-modal signal
- Polarization vision
- Sensory bias
- Signal evolution
- Stomatopod