Predation of green peach aphids by generalist predators in the presence of alternative, Colorado potato beetle egg prey

Koss, Amanda M.; Chang, Gary C.; Snyder, William E.

doi:10.1016/j.biocontrol.2004.04.006

Cited by 40 publications

(37 citation statements)

References 36 publications

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“…and Nabis spp. (Hemiptera) ate fewer Colorado potato beetle eggs when more aphids were present but not vice versa (Koss et al, 2004;Koss & Snyder, 2005). Especially the nabids appeared to prefer aphids over beetle eggs as prey, although both groups of predators readily consumed beetle eggs in the absence of aphids.…”

Section: Reduced Consumption Of Focal Prey (Dilution/distraction Effementioning

confidence: 99%

“…When also provided with fruit flies, the carabid Bembidion lampros (Herbst) ate more cereal aphids (R. padi) (Madsen et al, 2004). Nabids consumed more green peach aphids on potatoes when many Colorado potato beetle eggs were also present, perhaps because encounters with eggs as well as aphids increased the time spent searching by these predators (Koss et al, 2004). Prasad & Snyder (2006b) added either aphids and/or individuals of the intraguild predator Pterostichus melanarius (Carabidae) to field cages of radish stocked with a given number of smaller carabids.…”

Section: Greater Consumption Of Focal Prey (Stimulatory Effects Of Almentioning

confidence: 99%

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Multitrophic interactions among plants, aphids, alternate prey and shared natural enemies - a review

Evans¹

2008

Eur. J. Entomol.

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Abstract. Given the generalist tendencies of most predatory arthropods, it is widely thought that their impact on a particular prey species in a given habitat (e.g., an insect pest in a crop) will depend frequently on the local availability of other prey (which for omnivorous predators, can include plant resources, such as fruit and pollen). Thus, from a slightly different perspective, aphids, other herbivorous insects, and plants often may interact indirectly by sharing natural enemies. Such interactions may be either negative or positive, as in the concepts of apparent competition and apparent mutualism, and may therefore have variable impact on the herbivores' host plants as well. I examine the different mechanisms for such indirect effects among herbivores as explored in the experimental literature. An impressive collective effort by numerous researchers recently has expanded considerably our empirical base of support for a variety of hypothesized mechanisms; aphids stand out as the most commonly studied subjects in research on these mechanisms. I therefore focus especially on the recent literature of cases involving aphids interacting indirectly with other prey for generalist predators. My remarks are organized by considering how the availability of alternate prey may alter functional and numerical (aggregative and reproductive) responses of predators to focal prey density. Although the distinctions among these different classes of predator responses and the associated indirect effects are often blurred and scale-dependent, this classification remains useful for organizing the diverse ways in which aphids have been found to participate in indirect interactions among prey as mediated by predators. Collectively, the results of the numerous studies reviewed here suggest that many such indirect interactions likely occur frequently in natural settings, with consequences ultimately for host plant performance.

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Section: Reduced Consumption Of Focal Prey (Dilution/distraction Effementioning

confidence: 99%

Section: Greater Consumption Of Focal Prey (Stimulatory Effects Of Almentioning

confidence: 99%

Multitrophic interactions among plants, aphids, alternate prey and shared natural enemies - a review

Evans¹

2008

Eur. J. Entomol.

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“…The hunger level of the predator and the availability of additional, non-target (non-pest) prey may greatly influence the ability of generalist predators to suppress populations of focal prey. In some studies, the term ''alternative prey'' is used to describe prey that may enhance predator survival but is not essential for its development (Harmon and Andow 2004;Koss et al 2004;Koss and Snyder 2005). Because differential quality of prey items is not implied in the present study we use here the term ''additional prey'' to describe the non-target, non-pest prey.…”

Section: Introductionmentioning

confidence: 97%

Consumption of aphids by spiders and the effect of additional prey: evidence from microcosm experiments

et al. 2008

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Spiders are common generalist predators in agroecosystems and have been suggested to lower herbivore abundance in crops. It is not clear, however, if spiders can effectively suppress pest populations, and if so, by what mechanisms. In a microcosm experiment, we examined the consumption of the bird cherry-oat aphid, Rhopalosiphum padi L. (Homoptera: Aphididae), a pest species in wheat fields, by three spider species that differ in their hunting methods. We then tested the effect of additional prey type on the ability of erigonid spiders to reduce aphids. In a 48-h experiment Mermessus denticulatus (Banks) (Araneae: Linyphiidae; Erigoninae) consumed more aphids than did Enoplognatha gemina Bosmans and Van Keer (Araneae: Theridiidae) and Bathyphantes cf. extricatus (OÁP.-Cambridge) (Araneae: Linyphiidae; Linyphiinae). This difference may be due to the ability of erigonids to forage actively on the vegetation in addition to using their webs to catch prey. In a 7-week experiment, we provided springtails (Collembola) in high and low densities as additional prey to mated erigonids, prior to aphid introduction. Spiders in the low-density springtail treatment built more webs on the vegetation, and caused a 50% reduction in aphid populations. There were significantly fewer aphids in the low-density springtail treatment, but not in the high-density treatment, in comparison to the control (high-density springtails without spiders). The results suggest that additional prey density affects predatory interactions between M. denticulatus and R. padi and that erigonids, which occur in high densities in wheat fields in the Negev desert, may be involved in aphid suppression in these agroecosystems.

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“…The high abundance of prey items as a short-term pulse reduces the chance that any one prey item will be eaten. In addition, the high overall prey abundance may reduce the predation rate on relatively rare prey taxa, making preferred but rare prey more difficult or relatively less advantageous to selectively forage for (prey shielding; Kean-Howie et al 1988;Aukema and Raffa 2004;Koss et al 2004). The potential for high numbers of prey items to reduce overall predation on a single prey species is crucial to understand in dynamic environments, particularly for threatened and rare species.…”

Section: Introductionmentioning

confidence: 99%

Effects of changes in alternative prey densities on predation of drifting lake sturgeon larvae (Acipenser fulvescens)

Waraniak

Valentine

Scribner

2017

Journal of Freshwater Ecology

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Predator-prey interactions including prey switching, predator swamping, and size-selectivity are important in maintaining multi-species systems. In fishes, early life stages are often recruitment bottlenecks due to high mortality partially caused by predation. High mortality is of particular concern for threatened species such as lake sturgeon (Acipenser fulvescens). Effects of different relative prey densities were examined using two predatory fishes [rock bass (Ambloplites rupestris) and hornyhead chub (Nocomis biguttatus)] and two density treatments of three prey [lake sturgeon, mayflies (Family: Heptageniidae), and suckers (Family: Catostomidae)]. Treatments consisted of prey introduced to predators in a series of pulses 30 min apart. In the initial low-density treatment, predators were offered prey at a pulse of prey at a 13:13:4 ratio of mayfly, suckers, and lake sturgeon, and a second pulse with a 1:1:1 prey ratio during the second pulse. In the equal-density treatment prey numbers were equivalent during both pulses. Larval sturgeon survival, predator preference, and size selection were measured for each trial. Lake sturgeon were the least preferred prey species while mayflies were positively selected. Hornyhead chub preference for lake sturgeon was higher in the equal-density treatment than in the low-density, indicating initial prey availability affected predator foraging behaviour. High densities of preferred macroinvertebrate prey could protect threatened lake sturgeon larvae from predation.

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Predation of green peach aphids by generalist predators in the presence of alternative, Colorado potato beetle egg prey

Cited by 40 publications

References 36 publications

Multitrophic interactions among plants, aphids, alternate prey and shared natural enemies - a review

Multitrophic interactions among plants, aphids, alternate prey and shared natural enemies - a review

Consumption of aphids by spiders and the effect of additional prey: evidence from microcosm experiments

Effects of changes in alternative prey densities on predation of drifting lake sturgeon larvae (Acipenser fulvescens)

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