Linking Predator Responses to Alkaloid Variability in Poison Frogs.

Autor: Lawrence JP; Department of Biology, University of Mississippi, University, MS, 38677, USA. JPLarry@gmail.com.; Lyman Briggs College, Michigan State University, East Lansing, MI, 48825, USA. JPLarry@gmail.com., Rojas B; Department of Biology and Environmental Science, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland.; Konrad Lorenz Institute of Ethology, Department of Interdisciplinary Life Sciences, University of Veterinary Medicine Vienna, Savoyenstraße 1, 1160, Vienna, Austria., Blanchette A; Department of Biology, John Carroll University, University Heights, OH, 44118, USA.; Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA, 70118, USA., Saporito RA; Department of Biology, John Carroll University, University Heights, OH, 44118, USA., Mappes J; Department of Biology and Environmental Science, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland.; Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, Helsinki University, Helsinki, Finland., Fouquet A; Laboratoire Evolution et Diversité Biologique, UMR5174, Université Paul Sabatier, 31062, Toulouse Cedex 9, France., Noonan BP; Department of Biology, University of Mississippi, University, MS, 38677, USA.
Jazyk: angličtina
Zdroj: Journal of chemical ecology [J Chem Ecol] 2023 Apr; Vol. 49 (3-4), pp. 195-204. Date of Electronic Publication: 2023 Mar 01.
DOI: 10.1007/s10886-023-01412-7
Abstrakt: Many chemically-defended/aposematic species rely on diet for sequestering the toxins with which they defend themselves. This dietary acquisition can lead to variable chemical defenses across space, as the community composition of chemical sources is likely to vary across the range of (an aposematic) species. We characterized the alkaloid content of two populations of the Dyeing Poison Frog (Dendrobates tinctorius) in northeastern French Guiana. Additionally, we conducted unpalatability experiments with naive predators, Blue Tits (Cyanistes caeruleus), using whole-skin secretion cocktails to assess how a model predator would respond to the defense of individuals from each population. While there was some overlap between the two D. tinctorius populations in terms of alkaloid content, our analysis revealed that these two populations are markedly distinct in terms of overall alkaloid profiles. Predator responses to skin secretions differed between the populations. We identified 15 candidate alkaloids (including three previously undescribed) in seven classes that are correlated with predator response in one frog population. We describe alkaloid profile differences between populations for D. tinctorius and provide a novel method for assessing unpalatability of skin secretions and identifying which toxins may contribute to the predator response. In one population, our results suggest 15 alkaloids that are implicated in predator aversive response. This method is the first step in identifying the causal link between alkaloids and behavioral responses of predators, and thus makes sense of how varying alkaloid combinations are capable of eliciting consistent behavioral responses, and eventually driving evolutionary change in aposematic characters (or characteristics).
(© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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