Diel vertical migration of the marine copepod Calanopia americana. II. Proximate role of exogenous light cues and endogenous rhythms

2005 ◽  
Vol 147 (2) ◽  
pp. 399-410 ◽  
Author(s):  
J. H. Cohen ◽  
R. B. Forward
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Endogenous Rhythms ◽  
Marine Copepod

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 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 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.

scholarly journals The Role of Endogenous Rhythms in Vertical Migration

1963 ◽  
Vol 43 (1) ◽  
pp. 153-166 ◽  
Author(s):  
John E. Harris
Keyword(s):  
Locomotor Activity ◽  
Vertical Migration ◽  
Continuous Illumination ◽  
Continuous Darkness ◽  
Photographic Recording ◽  
Endogenous Rhythms ◽  
The Hours ◽  
External Stimuli ◽  
Small Tank

Photographic recording at hourly intervals of a group of animals contained in a small tank kept in continuous darkness has revealed a 24 h cycle of locomotor activity in Daphnia magna and in Calanus helgolandicA change in periodicity of the rhythm in Daphnia kept under continuous illumination suggests that the cycle is not determined by external stimuliThe phasing of the cycle differs in the two animals, but in both there is an increase in activity during the hours of darkness.In Calanus and possibly also in Daphnia, the cycle of activity is absent in the winter months.

Sign in / Sign up

Export Citation Format

Share Document