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Updated: Jul 15, 2026
06:24
Individual Culturing of Tigriopus Copepods and Quantitative Analysis of Their Mate-guarding Behavior
Published on: September 26, 2018
Planktonic copepods reacting selectively to hydrodynamic disturbances
J Rudi Strickler1, Gábor Balázsi
1WATER Institute, University of Wisconsin-Milwaukee, Milwaukee, WI 53204, USA. jrs@uwm.edu
Summary
Planktonic copepods can differentiate between hydrodynamic signals from predators, prey, and mates. This ability suggests that swimming disturbances provide crucial information for survival and reproduction in aquatic environments.
Area of Science:
- Hydrodynamics
- Zooplankton behavior
- Sensory ecology
Background:
- Planktonic copepods navigate a fluid environment filled with hydrodynamic disturbances.
- These disturbances are generated by the movement of other zooplankton, including predators, prey, and conspecifics.
Purpose of the Study:
- To investigate if planktonic copepods can distinguish between hydrodynamic disturbances caused by different types of organisms.
- To explore the adaptive significance of tandem swimming behavior in copepod mating.
Main Methods:
- Utilized a Schlieren optical system with a density gradient to film copepod reactions to artificial hydrodynamic disturbances at 48 frames per second.
- Observed behavioral responses of *Cyclops scutifer* and *Epischura nordenskioldi* to varying disturbance strengths.
- Applied novel mathematical tools to re-examine earlier data on tandem swimming in *C. scutifer* during mating.
Main Results:
- Copepods demonstrated differentiated reactions to hydrodynamic disturbances of varying strengths.
- Analysis indicated that hydrodynamic signals contain sufficient information for distinct behavioral responses.
- Re-examination of tandem swimming in *C. scutifer* revealed potential correlations relevant to mating success.
Conclusions:
- Hydrodynamic disturbances generated by swimming zooplankton carry complex information that allows for differentiated responses.
- Tandem swimming during mating may confer an adaptive advantage by promoting offspring with enhanced escape capabilities.
- This sensory modality plays a critical role in predator avoidance, prey detection, and reproductive success in planktonic copepods.
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