Effect of host instar on host discrimination of heterospecific‐parasitised hosts by sympatric parasitoids

Cebolla, Ruth; Bru, Pablo; Urbaneja, Alberto; Tena, Alejandro

doi:10.1111/een.12479

Cited by 1 publication

(1 citation statement)

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“…In California, a preference for smaller hosts allows A. melinus to displace A. lingnanensis by reducing the number of hosts that grow large enough for A. lingnanensis to produce female progeny (109). Similarly, displacement of A. chrysomphali by A. melinus has been observed in many parts of the Mediterranean basin, with A. melinus tending to lay more eggs and accepting more heterospecifically parasitized hosts than does A. chrysomphali (26,27). In Spain, A. chrysomphali avoids displacement by shifting its host-size preferences depending on activity of the dominant A. melinus (129,130).…”

Section: Exploitative Competitionmentioning

confidence: 99%

Extrinsic Inter- and Intraspecific Competition in Parasitoid Wasps

Ode

Vyas

Harvey

2022

Annu. Rev. Entomol.

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The diverse ecology of parasitoids is shaped by extrinsic competition, i.e., exploitative or interference competition among adult females and males for hosts and mates. Adult females use an array of morphological, chemical, and behavioral mechanisms to engage in competition that may be either intra- or interspecific. Weaker competitors are often excluded or, if they persist, use alternate host habitats, host developmental stages, or host species. Competition among adult males for mates is almost exclusively intraspecific and involves visual displays, chemical signals, and even physical combat. Extrinsic competition influences community structure through its role in competitive displacement and apparent competition. Finally, anthropogenic changes such as habitat loss and fragmentation, invasive species, pollutants, and climate change result in phenological mismatches and range expansions within host–parasitoid communities with consequent changes to the strength of competitive interactions. Such changes have important ramifications not only for the success of managed agroecosystems, but also for natural ecosystem functioning. Expected final online publication date for the Annual Review of Entomology, Volume 67 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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