Host instar preference and functional response of Aphidius transcaspicus, a parasitoid of mealy aphids (Hyalopterus species)

Latham, Daniel R.; Mills, Nicholas J.

doi:10.1007/s10526-012-9440-8

Cited by 18 publications

(11 citation statements)

References 59 publications

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“…Understanding the demographic composition of aphid populations under field conditions can guide classical biological control programs. For example, identifying predators or parasitoids that prefer nymphal aphid stages would have the greatest influence on λ (Latham & Mills, ). Retrospective analysis indicated that contributions from nymphal growth stages 2–3, 3–4, and 4 to adult (Figure B) collectively accounted for most of the variation in λ between feeding locations on flowers vs. leaves; reproductive adults had the single greatest positive contribution to λ.…”

Section: Discussionmentioning

confidence: 99%

Feeding location affects demographic performance of cabbage aphids on winter canola

Cibils–Stewart

Sandercock

2015

Entomologia Exp Applicata

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The cabbage aphid, Brevicoryne brassicae L. (Hemiptera: Aphididae), is a perennial pest that specializes on plants of the Brassicaceae family, attacking winter canola (Brassica napus L.) mainly during and after flowering. Under field conditions, cabbage aphid colonizes the upper flowering canopy. Population dynamics of aphids in the flowering canopy could be regulated by differences in either plant quality (bottom-up) or predatory (top-down) forces. The goal of our study was to determine the effect of feeding location on cabbage aphid demography. A stage-structured matrix population model was constructed for aphids restricted to reproductive or vegetative plant tissues of canola. We found that feeding location had a large impact on demography of cabbage aphid; the finite rate of increase (k AE SEM) was higher when aphids were restricted to reproductive tissues, compared to aphids feeding on vegetative tissues: 1.25 AE 0.01 vs. 1.17 AE 0.01 (leaves). Aphids confined to reproductive tissues with higher k exhibited shorter generation times (T = 14.2 AE 0.2 days) and 53-75% higher net reproductive rates (R 0 = 23.3 AE 1.7) than aphids feeding on vegetative tissues. Prospective analyses showed that there was a nymph-skewed stable stage distribution, and elasticity values revealed that k is most sensitive to changes in stasis of adults staying in the adult stage and to adult survival. Retrospective analyses indicated that variation in adult fecundity (value of 0.05) had the largest effect on population dynamics but collectively, growth of nymphal stage 2-3, 3-4, and 4 to adult accounted for most of the difference in k between the treatments. Monitoring programs should target adults and penultimate instars colonizing reproductive tissues of canola plants in the field as aphids on these plant structures contribute most to population growth.

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Section: Discussionmentioning

confidence: 99%

Feeding location affects demographic performance of cabbage aphids on winter canola

Cibils–Stewart

Sandercock

2015

Entomologia Exp Applicata

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“…Madadi et al . ; Carrillo & Peña ; Latham & Mills ), this technique has only recently been applied as a comparative tool in invasion biology (Dick et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…Whilst functional response techniques have been used extensively in biological control research to assess impacts of control agents (e.g. Madadi et al 2011;Carrillo & Peña 2012;Latham & Mills 2012), this technique has only recently been applied as a comparative tool in invasion biology . There is growing evidence that invasive species frequently exhibit higher functional response curve asymptotes (i.e.…”

Section: Introductionmentioning

confidence: 99%

Predicting invasive species impacts: a community module functional response approach reveals context dependencies

Paterson

Dick

Pritchard

et al. 2014

Journal of Animal Ecology

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SummaryPredatory functional responses play integral roles in predator–prey dynamics, and their assessment promises greater understanding and prediction of the predatory impacts of invasive species. Other interspecific interactions, however, such as parasitism and higher-order predation, have the potential to modify predator–prey interactions and thus the predictive capability of the comparative functional response approach. We used a four-species community module (higher-order predator; focal native or invasive predators; parasites of focal predators; native prey) to compare the predatory functional responses of native Gammarus duebeni celticus and invasive Gammarus pulex amphipods towards three invertebrate prey species (Asellus aquaticus, Simulium spp., Baetis rhodani), thus, quantifying the context dependencies of parasitism and a higher-order fish predator on these functional responses. Our functional response experiments demonstrated that the invasive amphipod had a higher predatory impact (lower handling time) on two of three prey species, which reflects patterns of impact observed in the field. The community module also revealed that parasitism had context-dependent influences, for one prey species, with the potential to further reduce the predatory impact of the invasive amphipod or increase the predatory impact of the native amphipod in the presence of a higher-order fish predator. Partial consumption of prey was similar for both predators and occurred increasingly in the order A. aquaticus, Simulium spp. and B. rhodani. This was associated with increasing prey densities, but showed no context dependencies with parasitism or higher-order fish predator. This study supports the applicability of comparative functional responses as a tool to predict and assess invasive species impacts incorporating multiple context dependencies.

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“…Functional response can predict population dynamics and the prey suppression ability of a predator (Solomon, 1949;Murdoch & Oaten, 1975;Fern andez-Arhex & Corley, 2003), thus it may provide insight into the mechanisms of predator-prey interactions and how multiple predators affect prey populations (Holling, 1959(Holling, , 1966. Although the functional response has been widely applied in ecological studies to assess impacts of predators on prey populations, information about such interactions at a community level is limited (Madadi et al, 2011;Carrillo & Peña, 2012;Latham & Mills, 2012). Therefore, comparison of functional responses among combinations of predators can be a valuable approach to predict and assess multiple predator impacts on their shared prey populations (Kumar et al, 2014;Wasserman et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Conspecific and heterospecific interactions modify the functional response of Harmonia axyridis and Propylea japonica to Aphis citricola

Feng

Zhou

et al. 2018

Entomologia Exp Applicata

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Harmonia axyridis (Pallas) and Propylea japonica (Thunberg) (both Coleoptera: Coccinellidae) are two common aphidophagous predators that overlap in their natural niche; therefore, interactions between these two predator species could affect their overall prey consumption. The consequences of intraguild interactions on the foraging efficiency of the two coccinellid species were investigated by evaluating the functional responses of single beetles and intra‐ and interspecific combinations to densities of the spirea aphid, Aphis citricola van der Goot (Hemiptera: Aphididae), on apple seedlings, during 2 and 12 h under laboratory conditions. A type II functional response was observed in all the bioassays. Solitary H. axyridis consumed significantly more aphids than single P. japonica in both exposure periods. However, at intermediate prey densities the prey consumption of P. japonica was slightly greater than that of H. axyridis. The 95% confidence intervals of the functional response curves of conspecific and heterospecific pairs overlapped at 2 h. In contrast, conspecific pairs of H. axyridis showed a higher functional response curve at 12 h compared to a combination of H. axyridis and P. japonica. Prey's predation risk reduction was only detected for paired H. axyridis and mixed predators compared to their estimated functional responses at the 2‐h foraging period. By comparing functional responses between intraguild predatory lady beetle combinations, we could further predict the potential ecosystem service provided by these natural enemies.

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Host instar preference and functional response of Aphidius transcaspicus, a parasitoid of mealy aphids (Hyalopterus species)

Cited by 18 publications

References 59 publications

Feeding location affects demographic performance of cabbage aphids on winter canola

Feeding location affects demographic performance of cabbage aphids on winter canola

Predicting invasive species impacts: a community module functional response approach reveals context dependencies

Conspecific and heterospecific interactions modify the functional response of Harmonia axyridis and Propylea japonica to Aphis citricola

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