Sentences with phrase «aphid species»

This aphid species seems to be therefore the sum of populations possessing different karyotypes that in turn can give diverse genetic / ecological / evolutionary responses in relation to imposed selective environmental forces.

The aphid species Macrosiphoniella yomogicola comes in two «morphs» with distinct colors: red and green.

Among the issues to be resolved there would be, for example, how to identify the environmental factors that control the production of aggressive morphs; what costs and benefits interaction involves for each participant; the taxonomic status of the deceit and the variability level in the chemical signal used for misleading ants; or what happens with related aphid species which also relate with ants.

Not exact matches

Parthenogenesis occurs naturally in many plants, some invertebrate animal species (including nematodes, water fleas, some scorpions, aphids, some bees, some Phasmida and parasitic wasps) and a few vertebrates (such as some fish, amphibians, reptiles and very rarely birds.

A parasitic wasp identified from Uroleucon aphids in South Dakota cup plants, for instance, had characteristics similar to specimens of a known species, A. tissoti, found in British Columbia and Florida.

Heidel - Baker reared a new related species of parasitic wasp, now called A. bicolor, on a different host Uroleucon aphid that feeds on asters.

The South Dakota researchers reared two species of parasitic wasps from the aphids, while Heidel - Baker reared five species.

The taxonomy of each wasp species now correlates with the host aphids and their plant hosts.

Sapped by attacks from an exotic aphid, a moth, and two species of bark beetles, the spruce - fir zone in the Pinalenos was scrofulous and drier than normal.

However, after more than 50 hours of recording different anthills through a microscopy, this research has revealed that a certain species of aphids produces individuals which are adopted in the ant's brood chamber and they end up being aggressive to them by sucking haemolymph from their larvae.

Waging war is just one of the habits that ants share with humans: Many species live in large, well - organized societies, and others take slaves, herd aphids like cattle, and raise fungi for food in underground farms.

On the other hand, these two closely related species of aphid do not necessarily feed on the same plants.

Going up the food chain, the scientists observed that there was little chance that the most closely related wasps feed on the same species of aphid.

These observations, carried out at an extraordinary level of detail, made it possible to establish the interactions between one hundred or so species situated on four trophic levels: plants (23 species), aphids that feed on these plants (25 species), wasps that lay their eggs in the bodies of the aphids (22 species), and other wasps that lay their eggs in the larvae of the preceding wasps inside aphids (26 species).

The experiments investigated both top - down (driven by predators) and bottom - up (food or resource limited) effects of the lights on the population density of a species of pea aphid, and in the presence and absence of predators including ladybirds.

Researchers examining the genes of different species of aphids and of their individual gut bacteria found that the emergence of new species of aphids during evolution was mirrored by speciation events in the insects» Buchnera symbionts.

It especially poses a threat to local ladybird species and other insects that feed on aphids.

Ants and aphids coexist in a symbiotic relationship that benefits both species.

Symbiotic relationships occur on a spectrum from parasitism (one species benefits at the expense of the other, such as a tick that sucks its host's blood) to mutualism (both organisms benefit, like when certain ants farm aphids for their honeydew while in return protecting them from predators).

Rapid transcriptional plasticity of duplicated gene clusters enables a clonally reproducing aphid to colonise diverse plant species