Phototactic behavior of native Daphnia in the presence of chemical cues from a non-native predator Bythotrephes

Kiehnau, Emily L.; Weider, Lawrence J.

doi:10.1007/s00442-019-04461-6

Cited by 2 publications

(1 citation statement)

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“…This may be due to the following reasons. First, the feeding rates of the abovementioned Daphnia exposed fish kairomone were carried out under dark conditions, and all of them were short-term experiments only for one day; − while our experiments were conducted under 24 h light condition and lasted for 14 days, Daphnia are more sensitive to fish kairomone under light conditions, which may cause them to increase their food intake to obtain more energy. , Second, under the stimulation of fish kairomone, the behavioral response of Daphnia will also be affected, including increased alertness, decreased activity, or changed swimming speed, − all of which will change the partitioning of energy. If the energy intake exceeds the consumption, sufficient energy will maintain a higher individual growth rate of Daphnia in the different ALAN patterns under the exposure of fish kairomone.…”

Section: Discussionmentioning

confidence: 99%

Artificial Light Pollution with Different Wavelengths at Night Interferes with Development, Reproduction, and Antipredator Defenses of Daphnia magna

Huang

Zhou

et al. 2022

Environ. Sci. Technol.

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Artificial light at night (ALAN) dramatically alters the natural daily cycle of light and may cause a suite of physiological and behavioral responses of freshwater crustacean Daphnia. Here, we conducted a life table experiment to investigate the effect of different wavelengths [white (L-L, 400−800 nm), red (R, 614 nm), green (G, 527 nm), and blue (B, 447 nm)] and flashing modes [three colors flash alternately (3-Flash), seven colors strobe alternately (7-Strobe)] of ALAN on the development, reproduction, and predator-induced defenses of Daphnia magna. The results showed that G inhibited the development of the body and tail spine of Daphnia at sexual maturity and decreased their reproduction. The 7-Strobe promoted Daphnia to develop a larger eye. There was an interaction between fish kairomones and ALAN, which intensified over time. ALAN enhanced the response of the relative tail spine length to fish kairomone at sexual maturity. In addition, L-L and R inhibited the body length of 10th instar D. magna in response to fish kairomone. Through the hierarchical cluster method, the 3-Flash and B are recommended as friendly artificial lighting to Daphnia. Our results highlight the interference effects of ALAN on Daphnia, which are helpful to assess the potential impact of light pollution on zooplankton.

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