Jellyfish distribute vertically according to irradiance

Andrea Bozman*, Josefin Titelman, Stein Kaartvedt, Ketil Eiane, Dag L. Aksnes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We tested the hypothesis that the coronate jellyfish Periphylla periphylla distributes vertically according to a preferential range of absolute light intensities. The study was carried out in Lurefjorden, Norway, a fjord characterized by mass occurrences of this jellyfish. We collected data on the vertical distribution of P. periphylla medusa during day, dusk and night periods from video observations by a remotely operated vehicle in relation to estimated ambient light levels. Our results suggest that large P. periphylla (average size in catches ∼9 cm diameter) avoided total irradiance levels above 5×10 -3 μmol quanta m -2 s -1. Nearly two-thirds of the population stayed above irradiance of 10 -7 μmol quanta m -2 s -1 during daytime, while some individuals occupied much darker water. Thus, part of the population appeared to distribute vertically and undertake diel vertical migration (DVM) according to a preferential range of light intensities.

Original languageEnglish (US)
Pages (from-to)280-289
Number of pages10
JournalJournal of Plankton Research
Volume39
Issue number2
DOIs
StatePublished - Mar 1 2017

Keywords

  • Periphylla periphylla
  • diel vertical migration
  • jellyfish behavior
  • light attenuation

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

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