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Chemical encoding of risk perception and predator detection among estuarine invertebrates

Poulin Remington X., Lavoie Serge, Siegel Katherine, Gaul David A., Weissburg Marc J. et Kubanek Julia. (2018). Chemical encoding of risk perception and predator detection among estuarine invertebrates. Proceedings of the National Academy of Sciences, 115, (4), p. 662-667.

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URL officielle: http://dx.doi.org/doi:10.1073/pnas.1713901115

Résumé

An effective strategy for prey to survive in habitats rich in predators is to avoid being noticed. Thus, prey are under selection pressure to recognize predators and adjust their behavior, which can impact numerous community-wide interactions. Many animals in murky and turbulent aquatic environments rely on waterborne chemical cues. Previous research showed that the mud crab, Panopeus herbstii, recognizes the predatory blue crab, Callinectus sapidus, via a cue in blue crab urine. This cue is strongest if blue crabs recently preyed upon mud crabs. Subsequently, mud crabs suppress their foraging activity, reducing predation by blue crabs. Using NMR spectroscopy- and mass spectrometry-based metabolomics, chemical variation in urine from blue crabs fed different diets was related to prey behavior. We identified the urinary metabolites trigonelline and homarine as components of the cue that mud crabs use to detect blue crabs, with concentrations of each metabolite dependent on the blue crab’s diet. At concentrations found naturally in blue crab urine, trigonelline and homarine, alone as well as in a mixture, alerted mud crabs to the presence of blue crabs, leading to decreased foraging by mud crabs. Risk perception by waterborne cues has been widely observed by ecologists, but the molecular nature of these cues has not been previously identified. Metabolomics provides an opportunity to study waterborne cues where other approaches have historically failed, advancing our understanding of the chemical nature of a wide range of ecological interactions.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0027-8424
Volume:115
Numéro:4
Pages:p. 662-667
Version évaluée par les pairs:Oui
Date:2018
Identifiant unique:10.1073/pnas.1713901115
Sujets:Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Sciences naturelles et génie > Sciences naturelles > Chimie
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:blue crab, chemical ecology, metabolomics, nonconsumptive, effects, predation
Informations complémentaires:En libre accès sur le site officiel de la revue. In open access on the official website of the journal.
Déposé le:01 sept. 2021 19:30
Dernière modification:01 sept. 2021 19:30
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