Increased lipid accumulation but not reduced metabolism explains improved starvation tolerance in cold-acclimated arthropod predators

Jensen, Kristoffer; Michaelsen, Jakob V.; Larsen, Marie T.; Kristensen, Torsten Nygård; Holmstrup, Martin; Overgaard, Johannes

doi:10.1007/s00114-018-1593-6

Cited by 10 publications

(6 citation statements)

References 49 publications

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“…Jensen, Mayntz, Wang, Simpson, and Overgaard () found that wolf spiders fed lipid‐rich/protein‐poor flies had a higher lipid content and survived starvation longer than spiders fed lipid‐poor/protein‐rich flies. Similarly, Jensen et al () related enhanced starvation tolerance in cold‐acclimated bugs ( O. majusculus ) and predatory mites ( Gaeolaelaps aculeifer ) to larger lipid stores induced by cold treatment. These studies support our finding that larger lipid stores from high‐quality prey enhances starvation tolerance.…”

Section: Discussionmentioning

confidence: 93%

Food quality of Ephestia eggs, the aphid Rhopalosiphum padi and mixed diet for Orius majusculus

Toft

Sørensen

Sigsgaard

et al. 2020

J Applied Entomology

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We studied the food quality of the aphid Rhopalosiphum padi to the pirate bug Orius majusculus using Ephestia eggs as high-quality comparison prey. Several performance parameters were tested on individuals that had been reared and maintained on each of the two single-prey diets or on a mixed diet. All fitness parameters were lower in individuals fed aphids only, indicating poor food quality of this prey. Compared with the pure Ephestia egg diet, the mixed diet enhanced teneral mass, while adult survival and female starvation tolerance were negatively affected and all other traits were unaffected. Body protein proportions were constant across diets, whereas lipid proportion was low in the aphid treatment. Preference for aphids was lower following a monotypic aphid diet than when reared on Ephestia eggs or a mixed diet. The results confirm that R. padi is low-quality food for O. majusculus as it is for other generalist predators, even though O. majusculus may contribute significantly to population suppression of the aphid. K E Y W O R D SAnthocoridae, Aphididae, biological control, dietary mixing, life cycle, pest

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Section: Discussionmentioning

confidence: 93%

Food quality of Ephestia eggs, the aphid Rhopalosiphum padi and mixed diet for Orius majusculus

Toft

Sørensen

Sigsgaard

et al. 2020

J Applied Entomology

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“…Nevertheless, there may be long-term consequences for predators under climate warming when energy intake decreases while still exceeding overall energy requirements. Predators have lower starvation tolerance at higher temperatures and lay fewer eggs when food-deprived under warming (Jensen et al, 2017(Jensen et al, , 2018. Predators could compensate for this by accumulating energy stores (Jensen et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Predators minimize energy costs, rather than maximize energy gains under warming: Evidence from a microcosm feeding experiment

et al. 2022

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1. Climate warming may alter predator-prey interactions and predator feeding behaviour due to increased metabolic demands. How predators meet these increased demands may depend on trade-offs in prey energy content and body size, handling time and other functional constraints.2. We tested hypotheses associated with these trade-offs with the predatory mite Stratiolaelaps scimitus, and three prey that differed in body size, energy content, and defenses (Folsomia candida, Oppia nitens, and Carpoglyphus lactis). We estimated metabolic rate, predation in choice and no choice feeding trials, movement rate, and lipid and protein content for all four species at 16°C and 24°C.We used these data to estimate the predator's energy demands and compared these to estimated energy intake in the choice feeding trials.3. Predators had greater metabolic demands at 24°C than at 16°C, but temperature did not affect predator or prey movement rates. Warming decreased lipid content, but not protein content, of all three prey species, leading to lower energy content for C. lactis and O. nitens, but not F. candida. In both feeding trials at 24°C, predators increased their feeding on the smaller, energy-poor C. lactis, but not the larger, energy-rich F. candida, resulting in lower estimated energy intake. S. scimitus did not feed on O. nitens at either temperature.4. Predators increasingly fed on small-bodied prey under warming and not the large-bodied prey despite the potential for greater energetic gains from larger prey. We posit that predators minimized energy lost during feeding through lower handling costs associated with C. lactis, rather than maximize energy gain. We conclude that selection of prey based on body size changes with temperature as a trade-off for predators to balance increased metabolic demands.As predators provide top-down control and regulate energy flow through the consumption of their prey, changes to predator feeding behaviour with climate warming may affect food web dynamics and ecosystem-level processes.

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“…This is advantageous if releasing the mites in early spring where night temperatures may drop below freezing. Furthermore, 10 °C storage also increases starvation tolerance in G. aculeifer (Jensen et al, 2017(Jensen et al, , 2018. If used preventatively in spring when temperatures fluctuate and pests have not yet established in the crop, storage at 10 °C might therefore be advantageous as mites are tolerant to low temperature and can sustain with little prey.…”

Section: Discussionmentioning

confidence: 99%

Interactive effects of temperature and time on cold tolerance and spring predation in overwintering soil predatory mites (Gaeolaelaps aculeifer Canestrini)

2019

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Increased lipid accumulation but not reduced metabolism explains improved starvation tolerance in cold-acclimated arthropod predators

Cited by 10 publications

References 49 publications

Food quality of Ephestia eggs, the aphid Rhopalosiphum padi and mixed diet for Orius majusculus

Food quality of Ephestia eggs, the aphid Rhopalosiphum padi and mixed diet for Orius majusculus

Predators minimize energy costs, rather than maximize energy gains under warming: Evidence from a microcosm feeding experiment

Interactive effects of temperature and time on cold tolerance and spring predation in overwintering soil predatory mites (Gaeolaelaps aculeifer Canestrini)

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