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Infective prey leads to a partial role reversal in a predator-prey interaction

An infective prey has the potential to infect, kill and consume its predator. Such a prey-predator relationship fundamentally differs from the predator-prey interaction because the prey can directly profit from the predator as a growth resource. Here we present a population dynamics model of partial...

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Autores principales: Kaitala, Veijo, Koivu-Jolma, Mikko, Laakso, Jouni
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8448379/
https://www.ncbi.nlm.nih.gov/pubmed/34534219
http://dx.doi.org/10.1371/journal.pone.0249156
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author Kaitala, Veijo
Koivu-Jolma, Mikko
Laakso, Jouni
author_facet Kaitala, Veijo
Koivu-Jolma, Mikko
Laakso, Jouni
author_sort Kaitala, Veijo
collection PubMed
description An infective prey has the potential to infect, kill and consume its predator. Such a prey-predator relationship fundamentally differs from the predator-prey interaction because the prey can directly profit from the predator as a growth resource. Here we present a population dynamics model of partial role reversal in the predator-prey interaction of two species, the bottom dwelling marine deposit feeder sea cucumber Apostichopus japonicus and an important food source for the sea cucumber but potentially infective bacterium Vibrio splendidus. We analyse the effects of different parameters, e.g. infectivity and grazing rate, on the population sizes. We show that relative population sizes of the sea cucumber and V. Splendidus may switch with increasing infectivity. We also show that in the partial role reversal interaction the infective prey may benefit from the presence of the predator such that the population size may exceed the value of the carrying capacity of the prey in the absence of the predator. We also analysed the conditions for species extinction. The extinction of the prey, V. splendidus, may occur when its growth rate is low, or in the absence of infectivity. The extinction of the predator, A. japonicus, may follow if either the infectivity of the prey is high or a moderately infective prey is abundant. We conclude that partial role reversal is an undervalued subject in predator-prey studies.
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spelling pubmed-84483792021-09-18 Infective prey leads to a partial role reversal in a predator-prey interaction Kaitala, Veijo Koivu-Jolma, Mikko Laakso, Jouni PLoS One Research Article An infective prey has the potential to infect, kill and consume its predator. Such a prey-predator relationship fundamentally differs from the predator-prey interaction because the prey can directly profit from the predator as a growth resource. Here we present a population dynamics model of partial role reversal in the predator-prey interaction of two species, the bottom dwelling marine deposit feeder sea cucumber Apostichopus japonicus and an important food source for the sea cucumber but potentially infective bacterium Vibrio splendidus. We analyse the effects of different parameters, e.g. infectivity and grazing rate, on the population sizes. We show that relative population sizes of the sea cucumber and V. Splendidus may switch with increasing infectivity. We also show that in the partial role reversal interaction the infective prey may benefit from the presence of the predator such that the population size may exceed the value of the carrying capacity of the prey in the absence of the predator. We also analysed the conditions for species extinction. The extinction of the prey, V. splendidus, may occur when its growth rate is low, or in the absence of infectivity. The extinction of the predator, A. japonicus, may follow if either the infectivity of the prey is high or a moderately infective prey is abundant. We conclude that partial role reversal is an undervalued subject in predator-prey studies. Public Library of Science 2021-09-17 /pmc/articles/PMC8448379/ /pubmed/34534219 http://dx.doi.org/10.1371/journal.pone.0249156 Text en © 2021 Kaitala et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Kaitala, Veijo
Koivu-Jolma, Mikko
Laakso, Jouni
Infective prey leads to a partial role reversal in a predator-prey interaction
title Infective prey leads to a partial role reversal in a predator-prey interaction
title_full Infective prey leads to a partial role reversal in a predator-prey interaction
title_fullStr Infective prey leads to a partial role reversal in a predator-prey interaction
title_full_unstemmed Infective prey leads to a partial role reversal in a predator-prey interaction
title_short Infective prey leads to a partial role reversal in a predator-prey interaction
title_sort infective prey leads to a partial role reversal in a predator-prey interaction
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8448379/
https://www.ncbi.nlm.nih.gov/pubmed/34534219
http://dx.doi.org/10.1371/journal.pone.0249156
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