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Spectral sensitivity of the chaetognath sagitta hispida


, : Spectral sensitivity of the chaetognath sagitta hispida. Biological Bulletin (Woods Hole) 168(1): 32-38

Using phototaxis as a behavioral measure of photosensitivity, the spectral sensitivity of S. hispida Conant (Chaetognatha) was determined. S. hispida is most sensitive to blue-green light, with maximum sensitivity at 500 nm. From 400-580 nm, the shape of the action spectrum for phototaxis approximates an absorbance spectrum for a rhodspin-based visual pigment. Photoreception probably is mediated largely by a single major pigment. An accessory pigment may play a role in photoreception at longer wavelengths. S. hispida is adapted for greaster photosensitivity wherever blue-green light dominates the available spectrum. This finding is consistent with the geographical range of this species, which comprises relatively clear blue-green tropical and subtropical seas.

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Accession: 006459894

DOI: 10.2307/1541171

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Related references

Sweatt, A.J.; Forward, R.B.Jr, 1985: Spectral sensitivity of the chaetognath Sagitta hispida Conant. The Biological Bulletin 168: 8

Sweatt, Aj, 1984: Photobiology of the chaetognath Sagitta hispida Conant. Dissertation Abstracts International B Sciences and Engineering 45(1): 92

Cosper T.C.; Reeve M.R., 1975: Digestive efficiency of the chaetognath sagitta hispida. Journal of Experimental Marine Biology & Ecology 17(1): 33-38

Lester, B., 1974: The process of egg-laying in the chaetognath Sagitta hispida. Biological Bullbiol. Lab. Woods Hole: 247-256

Cosper, TC.; Reeve, MR., 1975: Digestive efficiency of the chaetognath Sagitta hispida Conant. A technique is described whereby the digestive efficiency of a plankton carnivore, Sagitta hispida Conant, which tends to feed infrequently on relatively large food organisms, was determined gravimetrically. The mean digestive efficiency in 24 exp...

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Beers, John R., 1964: Ammonia and inorganic phosphorus excretion by the planktonic chaetognath, Sagitta hispida Conant. Ammonia-nitrogen and phosphate-phosphorus excretion was studied in the chaetognath, Sagitta hispida Conant. Rates of excretion were determined by the difference in ammonia and phosphate levels in sea water in which the animals were maintained for...

Reeve M.R.; Cosper T.C.; Walter M.A., 1975: Visual observations on the process of digestion and the production of fecal pellets in the chaetognath sagitta hispida. Journal of Experimental Marine Biology & Ecology 17(1): 39-46