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Colour vision in the glow-worm Lampyris noctiluca (L.) (Coleoptera: Lampyridae): evidence for a green-blue chromatic mechanism

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posted on 2023-06-08, 05:50 authored by David Booth, Alan StewartAlan Stewart, Daniel Colaco OsorioDaniel Colaco Osorio
Male glow-worms Lampyris noctiluca find their bioluminescent mates at night by phototaxis. There is good evidence that location of mates by lampyrid beetles is achieved by a single spectral class of photoreceptor, whose spectral sensitivity is tuned to the bioluminescent spectrum emitted by conspecifics, and is achromatic. We ask whether glow-worm phototaxis involves interactions between two spectral classes of photoreceptor. Binary choice experiments were conducted in which males were presented with artificial light stimuli that differ in spectral composition. The normal preference for a green stimulus (?max=555 nm), corresponding to the bioluminescence wavelength produced by signalling females, was significantly reduced by adding a blue (?max=485 nm) component to the signal. This implies an antagonistic interaction between long- and short-wavelength sensitive photoreceptors, suggesting colour vision based on chromatic opponency. Cryosections showed a band of yellow filter pigment in the fronto-dorsal region of the male compound eye, which could severely constrain colour vision in the dim conditions in which the insects signal. This apparent paradox is discussed in the context of the distribution of the pigment within the eye and the photic niche of the species.

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of Experimental Biology

ISSN

0022-0949

Publisher

Company of Biologists

Issue

14

Volume

207

Page range

2373-2378

Pages

6.0

Department affiliated with

  • Evolution, Behaviour and Environment Publications

Notes

AJAS designed the experimental apparatus and protocols, carried out a pilot study, wrote approximately 50% of the paper and edited the final draft. Booth (PhD student) performed the experiments under direction from AJAS, with non-supervisory input from Osorio. Rare example of colour vision in an insect. Reviewed in journal's editorial.

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

First Open Access (FOA) Date

2018-08-02

First Compliant Deposit (FCD) Date

2018-08-02

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