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Article
Temporal Resolution in Mesopelagic Crustaceans
Philosophical Transactions: Biological Sciences
  • Tamara M. Frank, Harbor Branch Oceanographic Institution
Document Type
Article
Publication Date
9-29-2000
Keywords
  • Temporal resolution,
  • Vision,
  • Crustaceans,
  • Deep sea,
  • Flicker fusion
Peer Reviewed
1
Abstract
Mesopelagic crustaceans occupy a dim-light environment that is similar to that of nocturnal insects. In a light-limited environment, the requirement for greater sensitivity may result in slower photoreceptor transduction and increased summation time. This should be reflected by a lower temporal resolution, as indicated by a lower critical flicker fusion frequency (CFF). Therefore, one would predict that the CFFs of mesopelagic organisms would be relatively low compared with those of their shallow-water relatives, just as nocturnal insects tend to have lower CFFs than diurnal insects. Using an electrophysiological apparatus that was adapted for shipboard use, the dark-adapted CFFs of a variety of species of mesopelagic crustaceans were determined using the electroretinogram. The parameter examined was the maximum CFF-the point at which further increases in irradiance no longer result in a faster flicker fusion frequency. The results summarized here indicate that there is a trend towards lower CFFs with increasing habitat depth, with some interesting exceptions.
Comments

Funded in part by National Science Foundation grant no. OCE-9730073 to T.M.F. and E.A. Widder.

Additional Comments
©2000 The Royal Society
Citation Information
Tamara M. Frank. "Temporal Resolution in Mesopelagic Crustaceans" Philosophical Transactions: Biological Sciences Vol. 355 Iss. 1401 (2000) p. 1195 - 1198 ISSN: 0962-8436
Available at: http://works.bepress.com/tamara-frank/38/