Does the carotenoid-based colouration of<i>Polymorphus minutus</i>facilitate its trophic transmission to definitive hosts?

Jacquin, Lisa; Mori, Q.; Médoc, Vincent

doi:10.1017/s0031182013000760

Cited by 5 publications

(5 citation statements)

References 31 publications

(62 reference statements)

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“…Moreover, due to the structural properties of iridovirus causing iridescence (Williams 2008), infected D. magna showed a higher reflectance in the UV and visible domains than apparently healthy D. magna. Infected D. magna may thus become more visible (especially considering the larger size of infected individuals) and then more attractive (O'Keefe et al 1998, Modarressie et al 2013, Jacquin et al 2013) for Notonecta sp., which has a high visibility in UV (375 nm) and green (520 nm) (Bennett and Ruck 1970). This is consistent with the tendency observed here in which Notonecta sp.…”

Section: Reduction Of Survival But Limited Effects On Vulnerability T...mentioning

confidence: 99%

Parasites make hosts more profitable but less available to predators

Prosnier

Loeuille²,

Hulot

et al. 2022

Preprint

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Parasites are omnipresent, and their eco-evolutionary significance has aroused much interest from scientists. Parasites may affect their hosts in many ways by altering host density, vulnerability to predation, and energy content, thus maximizing profitability within the optimal foraging framework. Consequently, parasites could impact predator diet and trophic links within food webs. Here, we investigate the consequences of the iridovirus Daphnia iridescent virus 1 (DIV-1) infection on the reproductive success, mortality, appearance, mobility, and biochemical composition of water fleas (Daphnia magna), a widespread freshwater crustacean. We compare search time between infected and uninfected Daphnia preyed by a common aquatic insect (Notonecta sp.) as well as the handling time and feeding preference of Notonecta sp. Our findings show that infection does not change fecundity but reduces lifespan and thereby constrains fitness. Infected Daphnia show reduced mobility and increased color reflectance in the UV and visible domains, which potentially affects their visibility and thus catchability. Infection increases body size and the amount of proteins but does not affect carbohydrate and lipid contents. Although infected Daphnia had a longer handling time, they tended to be preferred over uninfected individuals by aquatic insects. Taken together, our findings show that DIV-1 infection could make Daphnia more profitable to predators (23% energy increase), a positive effect that should be balanced with density reductions due to higher mortalities. We also highlight that exposure to infection in asymptomatic individuals leads to ecological characteristics that differ from both healthy and symptomatic infected individuals.

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Section: Reduction Of Survival But Limited Effects On Vulnerability T...mentioning

confidence: 99%

Parasites make hosts more profitable but less available to predators

Prosnier

Loeuille²,

Hulot

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…non-white). Infected D. magna may thus become more visible (especially considering the larger size of infected individuals) and more attractive (O'Keefe et al 1998, Jacquin et al 2013, Modarressie et al 2013) for Notonecta sp., which has a high sensitivity in UV (375 nm) and green (520 nm) (Bennett and Ruck 1970). This is consistent with the observed preference of Notonecta sp.…”

Section: Reduction Of Survival But Limited Effects On Vulnerability T...mentioning

confidence: 99%

Parasites make hosts more profitable but less available to predators

Prosnier,

Loeuille,

Hulot

et al. 2024

Oikos

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Parasites are omnipresent, and their eco‐evolutionary significance has aroused much interest from scientists. Parasites may affect their hosts in many ways with changes in density, appearance, behaviour and energy content, likely to modify their value to predators (profitability) within the optimal foraging framework. Consequently, parasites could impact predators' diet and the trophic links through food webs. Here, we investigate the consequences of the infection by the iridovirus Daphnia iridescent virus 1 (DIV‐1) on the reproductive success, mortality, appearance, mobility, and biochemical composition of water fleas Daphnia magna, a widespread freshwater crustacean. We do predation tests and compare search time, handling time and feeding preference between infected and uninfected Daphnia when preyed upon by Notonecta sp., a common aquatic insect. Our findings show that infection does not change fecundity but reduces lifespan and thereby constrains fitness. Infected Daphnia show reduced mobility and increased color reflectance in the UV and visible domains, which potentially affects their appearance and thus vulnerability to predators. Infection increases body size and the amount of proteins but does not affect carbohydrate and lipid contents. Although infected Daphnia are longer to handle, they are preferred over uninfected individuals by aquatic insects. Taken together, our findings show that DIV‐1 infection could make Daphnia more profitable to predators (24% energy increase), a positive effect that should be balanced with a lower availability due to the higher mortality of infected specimens. We also highlight that exposure to infection in asymptomatic individuals leads to ecological characteristics that differ from both healthy and symptomatic infected individuals.

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“…The altered coloration was suggested to facilitate predation by and thus transmission to final hosts (fishes and waterbirds, respectively). Indeed Bakker, Mazzi, and Zala () and Jacquin, Mori, and Médoc () showed that gammarids painted with an orange spot on the cuticle were preferentially preyed upon by three‐spined sticklebacks and mallards, clearly indicating that the altered coloration affects predation of the intermediate host. Interestingly, a subsequent study found no significant impact on predation by trout (Kaldonski et al., ) suggesting the colour effects differ among species (see also Thünken et al., unpublished data in Table S1).…”

Section: Experimental Manipulation Of Intermediate Host Traitsmentioning

confidence: 99%

Adaptive parasitic manipulation as exemplified by acanthocephalans

2017

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Parasites with complex life cycles often change intermediate host traits in order to enhance their transmission to the next host. Acanthocephalans are excellent examples of such parasitic manipulation. Here, we summarise evidence for adaptive parasitic manipulation in this group, provide a comprehensive overview of intermediate host traits affected by these parasites and discuss critical items for parasitic manipulation such as avoidance of infected prey by target hosts and transmission to dead‐end hosts.

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Does the carotenoid-based colouration ofPolymorphus minutusfacilitate its trophic transmission to definitive hosts?

Cited by 5 publications

References 31 publications

Parasites make hosts more profitable but less available to predators

Parasites make hosts more profitable but less available to predators

Parasites make hosts more profitable but less available to predators

Adaptive parasitic manipulation as exemplified by acanthocephalans

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