Advertisement

Topics

Host specialization of parasitoids and their hyperparasitoids on a pair of syntopic aphid species.

08:00 EDT 13th March 2013 | BioPortfolio

Summary of "Host specialization of parasitoids and their hyperparasitoids on a pair of syntopic aphid species."

Parasitoids of herbivorous insects have frequently evolved specialized lineages exploiting hosts occurring on different plants. This study investigated whether host specialization is also observed when closely related parasitoids exploit herbivorous hosts sharing the same host plant. The question was addressed in economically relevant aphid parasitoids of the Lysiphlebus fabarum group. They exploit two aphid species (Aphis fabae cirsiiacanthoides and Brachycaudus cardui), co-occurring in mixed colonies (syntopy) on the spear thistle (Cirsium vulgare). Two morphologically distinguishable parasitoid lineages of the genus Lysiphlebus were observed and each showed virtually perfect host specialization on one of the two aphid species in this system. From A. f. cirsiiacanthoides, only females emerged that morphologically belonged to Lysiphlebus cardui, while males and females belonging to L. fabarum hatched from B. cardui. Microsatellite analyses indicated clear genetic differentiation of L. fabarum and L. cardui. L. cardui comprised only two distinct asexual lineages, one of which predominated throughout the area investigated. Population genetic analysis of sexual L. fabarum showed evidence for relatively strong spatial structuring and limited dispersal ability. Hyperparasitoids emerged from a large proportion of aphid mummies. One species, Pachyneuron aphidis, was significantly associated with B. cardui/L. fabarum mummies, indicating that host specialization may even extend to the trophic level above parasitoids.

Affiliation

Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.

Journal Details

This article was published in the following journal.

Name: Bulletin of entomological research
ISSN: 1475-2670
Pages: 1-8

Links

DeepDyve research library

PubMed Articles [4536 Associated PubMed Articles listed on BioPortfolio]

The Effects of Aphid Traits on Parasitoid Host Use and Specialist Advantage.

Specialization is a central concept in ecology and one of the fundamental properties of parasitoids. Highly specialized parasitoids tend to be more efficient in host-use compared to generalized parasi...

The Effects of Bean Leafroll Virus on Life History Traits and Host Selection Behavior of Specialized Pea Aphid (Acyrthosiphon pisum, Hemiptera: Aphididae) Genotypes.

Intraspecific specialization by insect herbivores on different host plant species contributes to the formation of genetically distinct "host races," but the effects of plant virus infection on interac...

Self- and Conspecific Discrimination Between Unparasitized and Parasitized Green Peach Aphid (Hemiptera: Aphididae), by Aphelinus asychis (Hymenoptera: Aphelinidae).

Aphelinus asychis Walker (Hymenoptera: Aphelinidae) is a solitary koinobiont endoparasitoid, which parasitizes the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae). Host discriminatio...

Effects of Size and Age of the Host Musca domestica (Diptera: Muscidae) on Production of the Parasitoid Wasp Spalangia endius (Hymenoptera: Pteromalidae).

One method of control of house flies, Musca domestica L. (Diptera: Muscidae), and other filth flies is by repeated release of large numbers of pupal parasitoids such as Spalangia endius Walker. Rearin...

Specificity of Multi-Modal Aphid Defenses against Two Rival Parasitoids.

Insects are often attacked by multiple natural enemies, imposing dynamic selective pressures for the development and maintenance of enemy-specific resistance. Pea aphids (Acyrthosiphon pisum) have eme...

Clinical Trials [619 Associated Clinical Trials listed on BioPortfolio]

Study of the Hemispheric Specialization for Language in Subjects With Neuropsychiatric Disorders Compared to Control Subjects

Recently, we have shown functional resonance imaging (fMRI) that variations in signal induced by a language task were significantly lower in a semantic region of the left hemisphere (compr...

Daily Disposable Silicone Hydrogel Contact Lens, Stenfilcon A, Clinical Study

Clinical evaluation of stenfilcon A compared with narafilcon A and delefilcon A This is a total 120 subject, randomized, open label, bilateral wear, two week crossover study (each lens fo...

The Influence of Oxytocin on Pair-bonding and Emotion Regulation

The neuropeptide oxytocin (OXT) has been identified as a key modulator of human social behavior and it has been recently shown that OXT also contributes to pair-bonding in men. However, it...

Effects of Prismatic Spectacle Lenses on Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria

The purpose of this study is to demonstrate whether, in patients diagnosed with Vertical Heterophoria, the symptoms of dizziness, headache and / or anxiety are reduced or eliminated when ...

Carfilzomib in Treating Patients With Chronic Graft-Versus-Host Disease

This pilot phase II trial studies how well carfilzomib works in treating patients with chronic graft-versus-host disease. Chronic graft-versus-host disease is a complication of a donor bon...

Medical and Biotech [MESH] Definitions

An immunological attack mounted by a graft against the host because of tissue incompatibility when immunologically competent cells are transplanted to an immunologically incompetent host; the resulting clinical picture is that of GRAFT VS HOST DISEASE.

An occupation limited in scope to a subsection of a broader field.

A specific pair GROUP C CHROMSOMES of the human chromosome classification.

A specific pair of GROUP C CHROMSOMES of the human chromosome classification.

Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs.

Quick Search
Advertisement
 


DeepDyve research library

Searches Linking to this Article