Can domoic acid affect escape response in copepods?

Sara Harðardóttir*, Bernd Krock, Sylke Wohlrab, Uwe John, Torkel Gissel Nielsen, Nina Lundholm

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Copepods are important grazers on toxic phytoplankton and serve as vectors for algal toxins up the marine food web. Success of phytoplankton depends among other factors on protection against grazers like copepods, and same way copepod survival and population resilience relies on their ability to escape predators. Little is, however, known about the effect of toxins on the escape response of copepods. In this study we experimentally tested the hypothesis that the neurotoxin domoic acid (DA) produced by the diatom Pseudo-nitzschia affects escape responses of planktonic copepods. We found that the arctic copepods Calanus hyperboreus and C. glacialis reduced their escape response after feeding on a DA-producing diatom. The two species were not affected the same way; C. hyperboreus was affected after shorter exposure and less intake of DA. The negative effect on escape response was not related to the amount of DA accumulated in the copepods. Our results suggest that further research on the effects of DA on copepod behavior and DA toxicity mechanisms is required to evaluate the anti-grazing function of DA.
Original languageEnglish
JournalHarmful Algae
Volume79
Pages (from-to)50-52
ISSN1568-9883
DOIs
Publication statusPublished - 2018

Keywords

  • Pseudo-nitzschia
  • Domoic acid
  • Calanus
  • Escape jumps

Cite this

Harðardóttir, S., Krock, B., Wohlrab, S., John, U., Nielsen, T. G., & Lundholm, N. (2018). Can domoic acid affect escape response in copepods? Harmful Algae, 79, 50-52. https://doi.org/10.1016/j.hal.2018.08.009
Harðardóttir, Sara ; Krock, Bernd ; Wohlrab, Sylke ; John, Uwe ; Nielsen, Torkel Gissel ; Lundholm, Nina. / Can domoic acid affect escape response in copepods?. In: Harmful Algae. 2018 ; Vol. 79. pp. 50-52.
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title = "Can domoic acid affect escape response in copepods?",
abstract = "Copepods are important grazers on toxic phytoplankton and serve as vectors for algal toxins up the marine food web. Success of phytoplankton depends among other factors on protection against grazers like copepods, and same way copepod survival and population resilience relies on their ability to escape predators. Little is, however, known about the effect of toxins on the escape response of copepods. In this study we experimentally tested the hypothesis that the neurotoxin domoic acid (DA) produced by the diatom Pseudo-nitzschia affects escape responses of planktonic copepods. We found that the arctic copepods Calanus hyperboreus and C. glacialis reduced their escape response after feeding on a DA-producing diatom. The two species were not affected the same way; C. hyperboreus was affected after shorter exposure and less intake of DA. The negative effect on escape response was not related to the amount of DA accumulated in the copepods. Our results suggest that further research on the effects of DA on copepod behavior and DA toxicity mechanisms is required to evaluate the anti-grazing function of DA.",
keywords = "Pseudo-nitzschia, Domoic acid, Calanus, Escape jumps",
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Harðardóttir, S, Krock, B, Wohlrab, S, John, U, Nielsen, TG & Lundholm, N 2018, 'Can domoic acid affect escape response in copepods?', Harmful Algae, vol. 79, pp. 50-52. https://doi.org/10.1016/j.hal.2018.08.009

Can domoic acid affect escape response in copepods? / Harðardóttir, Sara; Krock, Bernd; Wohlrab, Sylke; John, Uwe; Nielsen, Torkel Gissel; Lundholm, Nina.

In: Harmful Algae, Vol. 79, 2018, p. 50-52.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Can domoic acid affect escape response in copepods?

AU - Harðardóttir, Sara

AU - Krock, Bernd

AU - Wohlrab, Sylke

AU - John, Uwe

AU - Nielsen, Torkel Gissel

AU - Lundholm, Nina

PY - 2018

Y1 - 2018

N2 - Copepods are important grazers on toxic phytoplankton and serve as vectors for algal toxins up the marine food web. Success of phytoplankton depends among other factors on protection against grazers like copepods, and same way copepod survival and population resilience relies on their ability to escape predators. Little is, however, known about the effect of toxins on the escape response of copepods. In this study we experimentally tested the hypothesis that the neurotoxin domoic acid (DA) produced by the diatom Pseudo-nitzschia affects escape responses of planktonic copepods. We found that the arctic copepods Calanus hyperboreus and C. glacialis reduced their escape response after feeding on a DA-producing diatom. The two species were not affected the same way; C. hyperboreus was affected after shorter exposure and less intake of DA. The negative effect on escape response was not related to the amount of DA accumulated in the copepods. Our results suggest that further research on the effects of DA on copepod behavior and DA toxicity mechanisms is required to evaluate the anti-grazing function of DA.

AB - Copepods are important grazers on toxic phytoplankton and serve as vectors for algal toxins up the marine food web. Success of phytoplankton depends among other factors on protection against grazers like copepods, and same way copepod survival and population resilience relies on their ability to escape predators. Little is, however, known about the effect of toxins on the escape response of copepods. In this study we experimentally tested the hypothesis that the neurotoxin domoic acid (DA) produced by the diatom Pseudo-nitzschia affects escape responses of planktonic copepods. We found that the arctic copepods Calanus hyperboreus and C. glacialis reduced their escape response after feeding on a DA-producing diatom. The two species were not affected the same way; C. hyperboreus was affected after shorter exposure and less intake of DA. The negative effect on escape response was not related to the amount of DA accumulated in the copepods. Our results suggest that further research on the effects of DA on copepod behavior and DA toxicity mechanisms is required to evaluate the anti-grazing function of DA.

KW - Pseudo-nitzschia

KW - Domoic acid

KW - Calanus

KW - Escape jumps

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DO - 10.1016/j.hal.2018.08.009

M3 - Journal article

C2 - 30420015

VL - 79

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JO - Harmful Algae

JF - Harmful Algae

SN - 1568-9883

ER -