Theoretical estimates of consumable food and probability of acquiring food in larvae of Chrysomya putoria (Diptera: Calliphoridae)

In this study, we used data from both experiments and mathematical simulations to analyze the consequences of the interacting effects of intraguild predation (IGP), cannibalism and parasitism occurring in isolation and simultaneously in trophic interactions involving two blowfly species under shared parasitism. We conducted experiments to determine the short‐term response of two blowfly species to these interactions with respect to their persistence. A mathematical model was employed to extend the results obtained from these experiments to the long‐term consequences of these interactions for the persistence of the blowfly species. Our experimental results revealed that IGP attenuated the strength of the effects of cannibalism and parasitism between blowfly host species, increasing the probability of persistence of both populations. The simulations obtained from the mathematical model indicated that IGP is a key interaction for the long‐term dynamics of this system. The presence of different species interacting in a tri‐trophic system relaxed the severity of the effects of a particular interaction between two species, changing species abundances and promoting persistence through time. This pattern was related to indirect interactions with a third species, the parasitoid species included in this study.

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Impacts of enemy‐mediated effects and the additivity of interactions in an insect trophic system

Reigada

Araújo

Aguiar

et al. 2012

Population Ecology

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Neighborhood Interactions and Larval Dispersal Behavior in Blowflies

et al. 2008

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Collective exodigestion favours blow fly colonization and development on fresh carcasses

2018

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26Necrophagous flies breeding on carcasses face high selection pressures and therefore 27 provide interesting opportunities to study social adaptations. We postulated that blowfly 28 necrophagous larvae gregariousness is an adaptive response to the environmental 29 constraints of fresh carcasses. Cooperation is indeed believed to be a key to the global 30 success of social species. To test this idea, the development of Lucilia sericata 31 (Diptera: Calliphoridae) larvae growing on low-or high-digestibility food substrate 32 (control or trypsin-added ground beef muscle, respectively) at different larval densities 33 was monitored. Results showed that larvae developed faster and had decreased 34 mortality at high larval density compared with low larval density. Furthermore, 35aggregation had no deleterious effect on the morphological characteristics (e.g., size) 36of post-feeding larvae and flies. We concluded that increased density positively 37 affected population fitness, which is a conclusion consistent with the predictions of the 38 Allee effect. Compared with regular food, larvae fed on high-digestibility food had 39 reduced mortality and faster development on average. According to these results, we 40 postulated that collective exodigestion might be an adaptive response allowing 41 blowflies to colonise fresh carcasses before the arrival of other insects and the 42 multiplication of microbes. This hypothesis is consistent with the idea that cooperation 43 may enable species to expand their niches. 44 45

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Theoretical estimates of consumable food and probability of acquiring food in larvae of Chrysomya putoria (Diptera: Calliphoridae)

Cited by 7 publications

References 33 publications

Impacts of enemy‐mediated effects and the additivity of interactions in an insect trophic system

Impacts of enemy‐mediated effects and the additivity of interactions in an insect trophic system

Neighborhood Interactions and Larval Dispersal Behavior in Blowflies

Collective exodigestion favours blow fly colonization and development on fresh carcasses

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