• Issue

    Ecological Entomology: Volume 47, Issue 6

    o1-o3, 915-1067
    December 2022

Issue Information

Free Access

Issue Information

  • Pages: o1-o3
  • First Published: 02 November 2022

Original Articles

Plant silicon defences reduce the performance of a chewing insect herbivore which benefits a contemporaneous sap-feeding insect

  • Pages: 951-958
  • First Published: 22 July 2022
Description unavailable

  • Silicon (Si) supplementation of plants reduced relative growth rates (RGRs) of Helicoverpa armigera caterpillars while promoting colonisation by aphids (Rhopalosiphum padi).
  • Caterpillar RGR and aphid abundance were negatively correlated on contemporaneously shared host plants. Furthermore, decreased caterpillar performance on Si-supplemented (+Si) plants benefitted aphid colonisation.
  • In dual-choice tests, aphids preferred caterpillar-attacked +Si plants to caterpillar-attacked Si-free (−Si) plants, whereas caterpillars preferred aphid-attacked −Si plants to aphid-attacked +Si plants.
Effects of plant silicon defences against chewing vs. sap-feeding insects

Re-evaluation of a method used to study nutritional effects on bumble bees

  • Pages: 959-966
  • First Published: 19 July 2022
Description unavailable

  • Microcolonies are queenless colonies often used as a model system to study environmental effects on bumblebee colonies, such as nutrition and pesticides.
  • Different pollen types varying in nutritional quality affected colony development of queenright colonies differently than microcolonies.
  • Microcolonies are an inaccurate model system and their use can lead to erroneous conclusions, more specifically an underestimation of negative effects of low-quality pollen on bumble bee fitness.

Open Access

Aphelinus nigritus-induced transgenerational fecundity compensation in parasitized Melanaphis sorghi

  • Pages: 967-980
  • First Published: 21 July 2022
Description unavailable

  • We have found that the F1 generation of parasitized Melanaphis sorghi aphids increases their fecundity relative to the F1 offspring of unparasitized aphids.
  • Neither needle wounding nor parasitoid stings (not resulting in parasitism) induce fecundity compensation in M. sorghi.
  • Since M. sorghi is a cereal aphid pest, the presence of fecundity compensation may complicate biocontrol efforts using Aphelinus nigritus parasitoids.

Open Access

Parasitoids affect plant responses through their host Pieris brassicae, but not for the benefit of their own performance

  • Pages: 981-988
  • First Published: 25 July 2022
Description unavailable

Many parasitoids indirectly affect plant responses to herbivory through the important modifications that they induce in their host. We tested the hypothesis that parasitoids manipulate plant responses in order to maximise their own fitness by measuring the performance of two parasitoid species whose host was fed with induced plants. Our results do not support the hypothesis of parasitoids manipulating plant responses for their own benefit, but confirm the significance of parasitoid-induced plant-mediated interactions in insect communities.

Non-native stinging ant interactions with native anurans

  • Pages: 989-997
  • First Published: 27 July 2022
Description unavailable

  • We examined the interactions between native anurans (Anaxyrus americanus [American toad], Lithobates clamitans [green frog] and Lithobates pipiens [leopard frog]) and a stinging non-native ant (Myrmica rubra)
  • We found that native anurans consumed native ants in the field, but we found no evidence that they consumed non-native M. rubra ants in their natural environments.
  • We also found that the anurans, particularly A. americanus, were willing to eat M. rubra in laboratory trials, but individuals captured in invaded habitat were less likely to consume the stinging ants in captivity.
Anuran stress as a function of previous experience with non-native Myrmica rubra ants. Anurans collected where M. rubra have invaded are indicated with “present” and those collected from uninvaded habitats are indicated with “absent”.

Correlates of Odonata species composition in Amazonian streams depend on dissimilarity coefficient and oviposition strategy

  • Pages: 998-1010
  • First Published: 04 August 2022
Description unavailable

  • Variation in Odonata species composition with different reproductive strategies depends on dissimilarity indices and environmental heterogeneity within a land use gradient.
  • Perch heterogeneity was related to the variation in the composition of endophytic species. Canopy and perch heterogeneity were related to the variation in the composition of exophytic species.
  • Evaluating the composition of Odonata using different indices of dissimilarities and considering oviposition strategies proved important to understanding species distribution in streams with environmental heterogeneity.

Spatial variation in ant–tree bipartite networks is driven by a bottom-up process

  • Pages: 1011-1021
  • First Published: 13 August 2022
Description unavailable

  • We collected 83 ant species from 144 tree species at the 5 study sites in Xishuangbanna, Yunnan province, China.
  • The ant–tree bipartite networks showed low connectance, high specificity and low niche overlap.
  • Because plant richness was positively related to ant richness, and because arboreal ants feed predominantly on extrafloral nectaries, seeds, insects and honeydew secreted from hemipteran insects, we believe the bottom-up process plays a central role in determining ant–tree interaction networks.
A weaver ant, Oecophylla smaragdina, foraging in Ficus racemosa.

Open Access

Body size, metabolic rate and diapause in the oriental hornet (Vespa orientalis), in two extreme climatic regions

  • Pages: 1022-1031
  • First Published: 26 August 2022
Description unavailable

Workers of the Oriental hornet from desert region are smaller and had a lower metabolic rate than worker from the Mediterranean region. Queens had a typical discontinuous gas exchange pattern, with Mediterranean queens having a 30% lower metabolic rate.

Variation in contact chemical cues may mediate differential predator response in the colour polymorphic tortoise beetle, Chelymorpha alternans

  • Pages: 1032-1043
  • First Published: 30 August 2022
Description unavailable

Color pattern phenotypes of Chelymorpha alternans experience different levels of predation which may be mediated by differences in contact chemical cues.

Variations in calling behaviour of wing dimorphic male crickets

  • Pages: 1044-1050
  • First Published: 14 September 2022
Description unavailable

  1. SW males sang more often than LW males in crickets Velarifictorus aspersus.
  2. Flying could have induced more investment in calling behaviour by LW males.
  3. Songs produced by dealate LW males and LW males after flying for 30 min were more attractive than those of SW males.
Singing activity and female preference of wing dimorphic male cricket, Velarifictorus asperses.

Size and location of host-plant shape the spatial pattern of forest insect

  • Pages: 1051-1060
  • First Published: 12 September 2022
Description unavailable

A spatial pattern of forest insect is a non-additive complex of patterns of insect and host tree. For the swift moth, the aggregation at landscape scale is far stronger than those at stand scale. Host size shapes this spatial pattern of the moth. The distribution of host tree also shapes the spatial pattern of the moth.

Open Access

Testing the migration syndrome: Comparative fecundity of migratory and non-migratory nymphaline butterflies

  • Pages: 1061-1067
  • First Published: 10 September 2022
Description unavailable

Sedentary Aglais butterflies showed similar fecundity, egg mass, and reproductive delay as related migratory Vanessa species, even though these traits are commonly thought to be favoured in migratory species. All these butterfly species are highly fecund compared across butterfly clades. The present study's results imply that rather than migration having selected for high fecundity, high fecundity might be a necessary prerequisite for evolving a migratory lifestyle.