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Ectosymbionts alter...
Ectosymbionts alter spontaneous responses to the Earth’s magnetic field in a crustacean
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- Landler, Lukas (författare)
- Virginia Polytechnic Institute and State University
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- Skelton, James (författare)
- Virginia Polytechnic Institute and State University,University of Florida
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- Painter, Michael S. (författare)
- Virginia Polytechnic Institute and State University,Czech University of Life Sciences Prague
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- Youmans, Paul W. (författare)
- Virginia Polytechnic Institute and State University
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- Muheim, Rachel (författare)
- Lund University,Lunds universitet,Funktionell zoologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Syngruppen,Forskargrupper vid Lunds universitet,Functional zoology,Department of Biology,Faculty of Science,Lund Vision Group,Lund University Research Groups
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- Creed, Robert P. (författare)
- Appalachian State University
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- Brown, Bryan L. (författare)
- Virginia Polytechnic Institute and State University
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- Phillips, John B. (författare)
- Virginia Polytechnic Institute and State University
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(creator_code:org_t)
- 2019-02-28
- 2019
- Engelska.
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 9:1
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.nature.c...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Magnetic sensing is used to structure every-day, non-migratory behaviours in many animals. We show that crayfish exhibit robust spontaneous magnetic alignment responses. These magnetic behaviours are altered by interactions with Branchiobdellidan worms, which are obligate ectosymbionts. Branchiobdellidan worms have previously been shown to have positive effects on host growth when present at moderate densities, and negative effects at relatively high densities. Here we show that crayfish with moderate densities of symbionts aligned bimodally along the magnetic northeast-southwest axis, similar to passive magnetic alignment responses observed across a range of stationary vertebrates. In contrast, crayfish with high symbiont densities failed to exhibit consistent alignment relative to the magnetic field. Crayfish without symbionts shifted exhibited quadramodal magnetic alignment and were more active. These behavioural changes suggest a change in the organization of spatial behaviour with increasing ectosymbiont densities. We propose that the increased activity and a switch to quadramodal magnetic alignment may be associated with the use of systematic search strategies. Such a strategy could increase contact-rates with conspecifics in order to replenish the beneficial ectosymbionts that only disperse between hosts during direct contact. Our results demonstrate that crayfish perceive and respond to magnetic fields, and that symbionts influence magnetically structured spatial behaviour of their hosts.
Ämnesord
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Etologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Behavioural Sciences Biology (hsv//eng)
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- ref (ämneskategori)
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