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:	Veijo Kaitala, Mikko Koivu-Jolma, Jouni Laakso
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fe452c80b2594452909885d553ae1de1
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spelling	oai:doaj.org-article:fe452c80b2594452909885d553ae1de12021-12-02T20:08:12ZInfective prey leads to a partial role reversal in a predator-prey interaction.1932-620310.1371/journal.pone.0249156https://doaj.org/article/fe452c80b2594452909885d553ae1de12021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0249156https://doaj.org/toc/1932-6203An 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.Veijo KaitalaMikko Koivu-JolmaJouni LaaksoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0249156 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Veijo Kaitala Mikko Koivu-Jolma Jouni Laakso Infective prey leads to a partial role reversal in a predator-prey interaction.
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.
format	article
author	Veijo Kaitala Mikko Koivu-Jolma Jouni Laakso
author_facet	Veijo Kaitala Mikko Koivu-Jolma Jouni Laakso
author_sort	Veijo Kaitala
title	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_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_sort	infective prey leads to a partial role reversal in a predator-prey interaction.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/fe452c80b2594452909885d553ae1de1
work_keys_str_mv	AT veijokaitala infectivepreyleadstoapartialrolereversalinapredatorpreyinteraction AT mikkokoivujolma infectivepreyleadstoapartialrolereversalinapredatorpreyinteraction AT jounilaakso infectivepreyleadstoapartialrolereversalinapredatorpreyinteraction
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Infective prey leads to a partial role reversal in a predator-prey interaction.

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