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Separate and combined effects of boat noise and a live crab predator on mussel valve gape behavior

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  • Jeroen Hubert
  • A Daniëlle van der Burg
  • Rob Witbaard
  • Hans Slabbekoorn

Abstract

Noisy human activities at sea are changing the acoustic environment, which has been shown to affect marine mammals and fishes. Invertebrates, such as bivalves, have so far received limited attention despite their important role in the marine ecosystem. Several studies have examined the impact of sound on anti-predator behavior using simulated predators, but studies using live predators are scarce. In the current study, we examined the separate and combined effects of boat sound playback and predator cues of shore crabs (Carcinus maenas) on the behavior of mussels (Mytilus spp.). We examined the behavior of the mussels using a valve gape monitor and scored the behavior from the crabs in one of two types of predator test conditions from video footage to control for effects from potential, sound-induced variation in crab behavior. We found that mussels closed their valve gape during boat noise and with a crab in their tank, but also that the stimulus combination did not add up to an even smaller valve gape. The sound treatment did not affect the stimulus crabs, but the behavior of the crabs did affect the valve gape of the mussels. Future research is needed to examine whether these results stand in situ and whether valve closure due to sound has fitness consequences for mussels. The effects on the well-being of individual mussels from anthropogenic noise may be relevant for population dynamics in the context of pressure from other stressors, their role as an ecosystem engineer, and in the context of aquaculture.

Suggested Citation

  • Jeroen Hubert & A Daniëlle van der Burg & Rob Witbaard & Hans Slabbekoorn, 2023. "Separate and combined effects of boat noise and a live crab predator on mussel valve gape behavior," Behavioral Ecology, International Society for Behavioral Ecology, vol. 34(3), pages 495-505.
    • Handle: RePEc:oup:beheco:v:34:y:2023:i:3:p:495-505.
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    File URL: http://hdl.handle.net/10.1093/beheco/arad012
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    References listed on IDEAS

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    1. Stephen D. Simpson & Andrew N. Radford & Sophie L. Nedelec & Maud C. O. Ferrari & Douglas P. Chivers & Mark I. McCormick & Mark G. Meekan, 2016. "Anthropogenic noise increases fish mortality by predation," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
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