Zonal orientation and spectral filtering in Talitrus saltator (Amphipoda, Talitridae)

Year: 1996

Authors: Ugolini A., Vignali B., Castellini C., Lindstrom M.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Dip. di Biologia Animale e genetica, Università di Firenze, Italy;
Tvarminne Zoological Station, Helsinki University Finland

Abstract: Adult individuals of Talitrus saltator were tested for celestial orientation in a plexiglass bowl covered with colour filters of different wavelengths. Results show that T. saltator can recognize the sun and use it for orientation only at lambda<450 nm. At lambda>500 nm, the sight of the sun (and sky) only induces phototactic behaviour. It has also been confirmed that an important celestial orienting factor is perceived in the UV range. Variations in populations from diversely oriented coastlines are discussed. Preliminary results of electroretinographic responses indicate the presence of at least two visual pigments in the eye and a steep decrease in sensitivity for lambda>500 nm.

Journal/Review: JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM

Volume: 76 (2)      Pages from: 377  to: 389

KeyWords: Ligia-exotica; Crustacea; Eye; Isopoda; Water; Bees
DOI: 10.1017/S0025315400030617

Citations: 27
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