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Möller, Klas Ove [Author]; St. John, Michael [Author]; Temming, Axel [Author]; Diekmann, Rabea [Author]; Peters, Janna [Author]; Floeter, Jens [Author]; Sell, Anne F [Author]; Herrmann, Jens-Peter [Author]; Gloe, Dominik [Author]; Schmidt, Jörn O. [Author]; Hinrichsen, Hans-Harald [Author]; Möllmann, Christian [Author]; Irigoien, Xabier [Author]

Predation risk triggers copepod small-scale behavior in the Baltic Sea

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  • Media type: E-Article
  • Title: Predation risk triggers copepod small-scale behavior in the Baltic Sea
  • Contributor: Möller, Klas Ove [Author]; St. John, Michael [Author]; Temming, Axel [Author]; Diekmann, Rabea [Author]; Peters, Janna [Author]; Floeter, Jens [Author]; Sell, Anne F [Author]; Herrmann, Jens-Peter [Author]; Gloe, Dominik [Author]; Schmidt, Jörn O. [Author]; Hinrichsen, Hans-Harald [Author]; Möllmann, Christian [Author]; Irigoien, Xabier [Author]
  • imprint: Oxford, 2020-11
  • Language: English
  • DOI: https://doi.org/10.1093/plankt/fbaa044
  • Origination:
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  • Description: Predators not only have direct impact on biomass but also indirect, non-consumptive effects on the behavior their prey organisms. A characteristic response of zooplankton in aquatic ecosystems is predator avoidance by diel vertical migration (DVM), a behavior which is well studied on the population level. A wide range of behavioral diversity and plasticity has been observed both between- as well as within-species and, hence, investigating predator–prey interactions at the individual level seems therefore essential for a better understanding of zooplankton dynamics. Here we applied an underwater imaging instrument, the video plankton recorder (VPR), which allows the non-invasive investigation of individual, diel adaptive behavior of zooplankton in response to predators in the natural oceanic environment, providing a finely resolved and continuous documentation of the organisms’ vertical distribution. Combing observations of copepod individuals observed with the VPR and hydroacoustic estimates of predatory fish biomass, we here show (i) a small-scale DVM of ovigerous Pseudocalanus acuspes females in response to its main predators, (ii) in-situ observations of a direct short-term reaction of the prey to the arrival of the predator and (iii) in-situ evidence of pronounced individual variation in this adaptive behavior with potentially strong effects on individual performance and ecosystem functioning.
  • Access State: Open Access