Summary
Electrophysiological determination of the spectral sensitivity of units from the retina, optic lobes and brain of the crabParagrapsus gaimardii revealed six major colour types. Single peaks occurred in the UV, blue-green, green and yellow, and further units showed either a broad-band sensitivity or double peaks in the violet and yellow.
Many of the curves had broad shoulders and offset peaks, markedly different in shape to curves suggested by Dartnall for rhodopsins with the same peak values, but similar to those previously recorded for other crabs. This finding, allied with limited evidence that a number of the colour types changed one from the other depending on illumination level, suggests that at least some of the colour types may result from a filtering of the light reaching a single retinal type.
The UV sensitivity, recorded from brain interneurons, is the highest so far found in crabs.
The range of colour types recorded provides a good potential substrate for colour vision. It is therefore of interest that a survey of a total of 105 units provided no evidence for colour opponency.
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References
Abramov J (1972) Retinal mechanisms of colour vision. In: Fuortes MGF (ed) Physiology of photoreceptor organs (Handbook of sensory physiology, vol VII/2). Springer, Berlin Heidelberg New York, pp 567–608
Briggs MH (1961) Visual pigments of grapsoid crabs. Nature 190:784–786
Bruno MS, Goldsmith TH (1974) Rhodopsin of the blue crabCallinectes: Evidence for absorption differences in vitro and in vivo. Vision Res 14:653–658
Bruno MS, Mote MI, Goldsmith TH (1973) Spectral absorption and sensitivity measurements in single ommatidia of the green crab,Carcinus. J Comp Physiol 82:151–163
Buddenbrook N von, Friedrich H (1933) Cited in: Waterman TH (1961) Light sensitivity and vision. In: Waterman TH (ed) The physiology of Crustacea. Academic Press, New York
Dartnall HJA (1952) The interpretation of spectral sensitivity curves. Br Med Bull 9:24–28
De Valois RL (1973) Central mechanisms of colour vision. In: Jung R (ed) Central processing of visual information A: Integrative functions and comparative data (Handbook of sensory physiology, vol VII/3A). Springer, Berlin Heidelberg New York, pp 209–253
Erber J, Menzel R (1977) Visual interneurons in the median protocerebrum of the bee. J Comp Physiol 121:65–77
Forward RB, Cronin TW (1979) Spectral sensitivity of larvae from intertidal crustaceans. J Comp Physiol 133:311–315
Gove PR (ed) (1971) Webster's third international dictionary. Merriam, Springfield
Goldsmith TH, Bruno MS (1973) Behaviour of rhodopsin and metarhodopsin in isolated rhabdoms of crabs and lobster. In: Langer H (ed) Biochemistry and physiology of visual pigments. Springer, Berlin Heidelberg New York, pp 147–153
Granit R (1947) Sensory mechanisms of the retina. Oxford University Press, London
Hyatt GW (1975) Physiological and behavioural evidence for colour discrimination by fiddler crabs (Brachyura, Ocypodidae, genusUca). In: Vernberg FJ (ed) Physiological ecology of estuarine organisms. University of South Caroline Press, Columbia
Kien J, Menzel R (1977a) Chromatic properties of interneurons in the optic lobes of the bee I.. J Comp Physiol 113:17–34
Kien J, Menzel R (1977b) Chromatic properties of interneurons in the optic lobes of the bee. II. J Comp Physiol 113:35–53
Kirschfeld K, Franceschini N, Minke B (1977) Evidence for a sensitizing pigment in fly photoreceptors. Nature 269:386–390
Laughlin SB (1976) Neural integration in the first optic neuropil of dragonflies. J Comp Physiol 112:199–211
Leggett LMW (1976) Polarised light-sensitive interneurons in a swimming crab. Nature 262: 709–711
Leggett LMW (1979) A retinal substrate for colour discrimination in crabs. J Comp Physiol 133:159–166
Menzel R (1979) Spectral sensitivity and colour vision in invertebrates. In: Autrum H (ed) Vision in invertebrates (Handbook of sensory physiology, vol VII/6A). Springer, Berlin Heidelberg New York, pp 503–580
Nosaki H (1969) Electrophysiological study of colour coding in the compound eye of crayfish,Procambarus clarkii. Z Vergl Physiol 64:318–328
Shaw SR (1966) Polarised light responses from crab retinula cells. Nature 211:92–93
Stowe S (1980) Spectral sensitivity and retinal pigment movement in the crabLeptograpsus variegatus (Fabricius). J Exp Biol 87:73–98
Stowe S (1981) Effects of illumination changes on rhabdom synthesis in a crab. J Comp Physiol 141:19–25
Swihart SL (1970) The neural basis of colour vision in the butterflyPapilio troilus. J Insect Physiol 16:1623–1636
Trevino DL, Larimer JL (1970) The responses of one class of neurons in the optic tracts of crayfish to monochromatic light. Z Vergl Physiol 69:139–149
Wald G (1968) Single and multiple visual systems of arthropods. J Gen Physiol 51:125–156
Washizu Y, Burkhardt D, Streck P (1964) Visual field of single retinula cells and interommatidial inclination in the compound eye of the blowflyCalliphora erythrocephala. Z Vergl Physiol 48:413–428
Woodcock AER, Goldsmith TH: Spectral responses of sustaining fibers in the optic tracts of crayfish (Procambarus). Z Vergl Physiol 69:117–133
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Queen Elizabeth II Fellow in Marine Science, 1978–1979
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Knight, D., Leggett, L.M.W. Six spectral sensitivity classes in crab visual interneurons. J. Comp. Physiol. 157, 235–245 (1985). https://doi.org/10.1007/BF01350030
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DOI: https://doi.org/10.1007/BF01350030