scholarly journals The role of ultraviolet radiation in the diel vertical migration of zooplankton: an experimental test of the transparency-regulator hypothesis

2015 ◽  
Vol 37 (5) ◽  
pp. 886-896 ◽  
Author(s):  
Taylor H. Leach ◽  
Craig E. Williamson ◽  
Nora Theodore ◽  
Janet M. Fischer ◽  
Mark H. Olson
Keyword(s):  
Ultraviolet Radiation ◽  
Experimental Test ◽  
Vertical Migration ◽  
Diel Vertical Migration

scholarly journals Diel vertical migration of copepods in mountain lakes: The changing role of ultraviolet radiation across a transparency gradient

2014 ◽  
Vol 60 (1) ◽  
pp. 252-262 ◽  
Author(s):  
Janet M. Fischer ◽  
Mark H. Olson ◽  
Nora Theodore ◽  
Craig E. Williamson ◽  
Kevin C. Rose ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Mountain Lakes ◽  
Changing Role

scholarly journals 5α-cyprinol sulfate, a bile salt from fish, induces diel vertical migration in Daphnia

eLife ◽  
2019 ◽  
Vol 8 ◽  
Author(s):  
Meike Anika Hahn ◽  
Christoph Effertz ◽  
Laurent Bigler ◽  
Eric von Elert
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Predator Avoidance ◽  
Aquatic Invertebrates ◽  
Chemical Cues ◽  
Temporal Distribution ◽  
Aquatic Environments ◽  
Inducible Defenses ◽  
Lipid Digestion

Prey are under selection to minimize predation losses. In aquatic environments, many prey use chemical cues released by predators, which initiate predator avoidance. A prominent example of behavioral predator-avoidance constitutes diel vertical migration (DVM) in the freshwater microcrustacean Daphnia spp., which is induced by chemical cues (kairomones) released by planktivorous fish. In a bioassay-guided approach using liquid chromatography and mass spectrometry, we identified the kairomone from fish incubation water as 5α-cyprinol sulfate inducing DVM in Daphnia at picomolar concentrations. The role of 5α-cyprinol sulfate in lipid digestion in fish explains why from an evolutionary perspective fish has not stopped releasing 5α-cyprinol sulfate despite the disadvantages for the releaser. The identification of the DVM-inducing kairomone enables investigating its spatial and temporal distribution and the underlying molecular mechanism of its perception. Furthermore, it allows to test if fish-mediated inducible defenses in other aquatic invertebrates are triggered by the same compound.

Effects of temperature and ultraviolet radiation on diel vertical migration of freshwater crustacean zooplankton

2008 ◽  
Vol 65 (6) ◽  
pp. 1144-1152 ◽  
Author(s):  
Sandra L. Cooke ◽  
Craig E. Williamson ◽  
Dina M. Leech ◽  
Wiebke J. Boeing ◽  
Lisette Torres
Keyword(s):  
Ultraviolet Radiation ◽  
Mixed Layer ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Crustacean Zooplankton ◽  
Stratified Lakes ◽  
Phototactic Response ◽  
Wide Range ◽  
Freshwater Crustacean ◽  
Daphnia Catawba

In transparent, thermally stratified lakes, ultraviolet radiation (UV) and temperature are among the primary factors influencing diel vertical migration (DVM) of zooplankton. It is not well known how behavioral responses will vary across a wide range of depths with steep gradients in UV, photosynthetically active radiation (PAR), and temperature. Our objective was to determine the relative importance of UV and temperature on DVM of Daphnia catawba and Leptodiaptomus minutus in a high UV, thermally stratified lake. Using UV-transparent (+UV) and UV-opaque (–UV) columns suspended within the mixed layer and metalimnion, we found that both species were generally shallower in the –UV than in the +UV columns. Daphnia catawba responded negatively to UV, even below the 1% depth for 320 nm, whereas L. minutus responded to UV only within the mixed layer and upper metalimnion. Daphnia catawba did not migrate in the –UV in the mixed layer, but migrated upwards in the –UV in the deep part of the metalimnion, indicating a temperature-induced rather than phototactic response. At night, both species migrated upwards in the metalimnion and were evenly distributed in the mixed layer. These results indicate that in transparent lakes, UV may constrain some zooplankton to cooler, suboptimal temperatures, which may compromise fitness.

scholarly journals From polar night to midnight sun: Diel vertical migration, metabolism and biogeochemical role of zooplankton in a high Arctic fjord (Kongsfjorden, Svalbard)

2017 ◽  
Vol 62 (4) ◽  
pp. 1586-1605 ◽  
Author(s):  
G. Darnis ◽  
L. Hobbs ◽  
M. Geoffroy ◽  
J. C. Grenvald ◽  
P. E. Renaud ◽  
...  
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
High Arctic ◽  
Polar Night ◽  
Arctic Fjord

Toward a more comprehensive theory of zooplankton diel vertical migration: Integrating ultraviolet radiation and water transparency into the biotic paradigm

2011 ◽  
Vol 56 (5) ◽  
pp. 1603-1623 ◽  
Author(s):  
Craig E. Williamson ◽  
Janet M. Fischer ◽  
Stephen M. Bollens ◽  
Erin P. Overholt ◽  
Joanne K. Breckenridge
Keyword(s):  
Ultraviolet Radiation ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Water Transparency ◽  
Comprehensive Theory
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