Comparative study of the spectral sensitivities of mesopelagic crustaceans |
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Authors: | T M Frank E A Widder |
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Institution: | (1) Division of Marine Science, Harbor Branch Oceanographic Institution, 5600 U.S. 1 N, Ft. Pierce, FL 34946, USA e-mail:frank@hboi.edu Fax: +1-561-468-0757, US |
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Abstract: | The spectral sensitivities of 12 species of mesopelagic crustaceans were studied by means of electrophysiological recordings.
Nine of the species are vertical migrators, while 3 are not, and 9 species possess bioluminescent organs, while 3 are not
bioluminescent. All species had a single peak of spectral sensitivity with maxima between 470 nm and 500 nm. There was no
apparent correlation between sensitivity maxima and daytime depth distribution, migratory behavior, or the presence or absence
of bioluminescent organs. With the exception of the hyperiid amphipod Phronima sedentaria, the spectral sensitivities of these mesopelagic crustaceans demonstrate a better match for maximum sensitivity to bioluminescence
than to downwelling light.
Accepted: 29 June 1999 |
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Keywords: | Mesopelagic Crustacean Electrophysiology Vision Deep-sea |
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