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On the different role of alarm substances and fish kairomones in diapause induction in a freshwater planktonic crustacean

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dc.abstract.enMany aquatic organisms anticipate predation risk via infochemical detection. In a laboratory experiment, we investigated the expression of life-history responses in planktonic Daphnia magna under long-lasting exposure to various concentrations of fish kairomones (FK) and alarm substances of Daphnia (AS). Daphnia were exposed to one of six concentrations of AS (0, 0.0005, 0.005, 0.05, 0.5, 5 homogenized D. magna/L) mixed with the highest concentration of FK, or to one of six concentrations of FK (diluted fish feces of 0, 0.001, 0.002, 0.01, 0.02, 0.1 fish/L) accompanied by the highest concentration of AS. FK alone at the highest concentration were sufficient to induce diapause in 21% of Daphnia, while AS alone at the highest concentration did not trigger diapause. Mixed at the highest concentrations, both cues induced diapause in 94% of Daphnia, whereas in the control treatment free of infochemicals no ephippial individuals occurred. No significant size or fecundity changes accompanied the diapause response. The graded type of diapause response observed across a wide concentration AS concentrations suggests that Daphnia use AS concentration as a proxy for the level of non-specific predation risk. In contrast, the abrupt change of diapause response across a narrow concentration of FK suggests that they were more critical to identify predator origin than level of risk.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorŚlusarczyk, Mirosław
dc.contributor.authorWięski, Kazimierz
dc.date.accessioned2024-01-25T15:46:12Z
dc.date.available2024-01-25T15:46:12Z
dc.date.copyright2022-11-01
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number2
dc.description.versionFINAL_PUBLISHED
dc.description.volume44
dc.identifier.doi10.1093/PLANKT/FBAC004
dc.identifier.issn0142-7873
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114802
dc.identifier.weblinkhttps://academic.oup.com/plankt/article-pdf/44/2/278/47521459/fbac004.pdf
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofJournal of Plankton Research
dc.relation.pages278-287
dc.rightsOther
dc.sciencecloudnosend
dc.subject.enchemical communication, plankton, kairomones, alarm substances
dc.titleOn the different role of alarm substances and fish kairomones in diapause induction in a freshwater planktonic crustacean
dc.typeJournalArticle
dspace.entity.typePublication