Courtship and Mating in Lariophagus Distinguendus (Först.) Kurdj. (Hymenoptera, Pteromalidae)

Assem, J. Van Den

doi:10.1163/002829670x00150

Cited by 29 publications

(9 citation statements)

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“…This prevents population crashes, for example if only small (and therefore egg limited) females are produced at early stages of evolution, the fittest (largest) females will reproduce on all available hosts rather than being limited by egg load. The assumption that both a male and a female are chosen for any reproductive event, rather than a female mating with only one or two males during her lifetime as is usually the case (van den Assem, 1970; van den Assem et al. , 1989), speeds up the genetic algorithm and prevents premature reduction in ‘genetic’ (connection weight) diversity.…”

Section: Methodsmentioning

confidence: 99%

Constraints on adaptation: explaining deviation from optimal sex ratio using artificial neural networks

Lewis

Tosh

O’Keefe

et al. 2010

J of Evolutionary Biology

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Determining processes constraining adaptation is a major challenge facing evolutionary biology, and sex allocation has proved a useful model system for exploring different constraints. We investigate the evolution of suboptimal sex allocation in a solitary parasitoid wasp system by modelling information acquisition and processing using artificial neural networks (ANNs) evolving according to a genetic algorithm. Theory predicts an instantaneous switch from the production of male to female offspring with increasing host size, whereas data show gradual changes. We found that simple ANNs evolved towards producing sharp switches in sex ratio, but additional biologically reasonable assumptions of costs of synapse maintenance, and simplification of the ANNs, led to more gradual adjustment. Switch sharpness was robust to uncertainty in fitness consequences of host size, challenging interpretations of previous empirical findings. Our results also question some intuitive hypotheses concerning the evolution of threshold traits and confirm how neural processing may constrain adaptive behaviour.

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Section: Methodsmentioning

confidence: 99%

Constraints on adaptation: explaining deviation from optimal sex ratio using artificial neural networks

Lewis

Tosh

O’Keefe

et al. 2010

J of Evolutionary Biology

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“…Thus, the objections of Gonen and Kugler could be disposed of. Several other studies were conducted by van den Assem [33,34] and his colleagues Bellows, Charnov, and Werren [35,36,37] and L. distinguendus was established as a model organism for general behavioral, evolutionary, and population ecology. The main focus of their work was on sex-ratio regulation and population dynamics [35,36,37].…”

Section: The 1970 and 1980smentioning

confidence: 99%

“…Ryoo and his colleagues were able to rebut objections of Gonen and Kugler from the 1970s regarding the short life of adult females or the high number of cases in which two eggs per host were laid [19]. They could show that the lifespan of female wasps was long enough for a sufficient parasitization of hosts and that two eggs per host normally only occur rarely or at low host densities when the waste of eggs is unimportant [18,33,42]. Ryoo further stated that “the biological characteristics of L. distinguendus may be compatible with efficient control of rice weevil populations” [18].…”

Section: The Early 1990smentioning

confidence: 99%

Lariophagus distinguendus (Hymenoptera: Pteromalidae) (Förster)—Past, Present, and Future: The History of a Biological Control Method Using L. distinguendus against Different Storage Pests

Niedermayer

Pollmann

Steidle

2016

Insects

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Legal requirements and consumer demands for residue-free products pose a big challenge for pest control in grain stores. One possible alternative to chemical insecticides is biological pest control with the pteromalid wasp Lariophagus distinguendus against the weevils Sitophilus granarius, S. oryzae (Coleoptera: Dryophtoridae), and many other storage pest beetles. The use of this wasp as a biocontrol agent was already suggested in 1919 by Prof. Dr. Hase [1]. Despite many studies on host-finding and behavioral biology, the applied aspect was neglected until 1994. Nowadays the wasps are commercially available and can now even be reared on-site, facilitating their use tremendously. This review highlights the milestones in L. distinguendus research, gives insights in current studies, and ventures a glimpse into the future.

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“…The courtship behaviour of L. distinguendus consists of male wing fanning, stimulated by the female cuticular hydrocarbon profile (CHC profile), followed by mounting and antennal stroking of the female antennae by the males. Subsequently, females signal receptivity by lowering their head and open their genital orifice leading to copulation [ 12 , 30 – 33 ]. It is unclear if this receptivity signal is stimulated by vibrations due to the wing fanning behaviour of the males [ 16 ], by pheromones transferred via the male antennae as suggested in other hymenopterous parasitoids (e.g., [ 34 ]), or by a male oral gland pheromone as in the related species N. vitripennis [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Sexy Mouth Odour? Male Oral Gland Pheromone in the Grain Beetle ParasitoidLariophagus distinguendus(Förster) (Hymenoptera: Pteromalidae)

König

Seeger

Steidle

2015

BioMed Research International

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Throughout the animal kingdom, sexual pheromones are used for the attraction of mates and as courtship signals but also enable sexual isolation between species. In the parasitic wasp Lariophagus distinguendus, male courtship behaviour consisting of wing fanning, antennal stroking of the female antenna, and head nodding stimulates female receptivity leading to copulation. Recently L. distinguendus was reported to consist of two different lineages, which are sexually isolated because males fail to elicit receptivity in foreign females. It is unclear, however, which part of the courtship behaviour triggers female receptivity and therefore could be a mechanism causing sexual isolation. Here we show that in L. distinguendus a nonvolatile male oral pheromone is essential to release the female receptivity signal. In contrast, male wing fanning and antennal contact play a minor role. Additionally, the composition of the oral pheromone depends on the developmental host and females learn the composition upon emergence from the host substrate. These results will enable more detailed work on oral sexual pheromones to answer the question of how they are involved in the speciation process of L. distinguendus and other parasitoid species, for a better understanding of the huge biodiversity in this group.

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Courtship and Mating in Lariophagus Distinguendus (Först.) Kurdj. (Hymenoptera, Pteromalidae)

Cited by 29 publications

References 0 publications

Constraints on adaptation: explaining deviation from optimal sex ratio using artificial neural networks

Constraints on adaptation: explaining deviation from optimal sex ratio using artificial neural networks

Lariophagus distinguendus (Hymenoptera: Pteromalidae) (Förster)—Past, Present, and Future: The History of a Biological Control Method Using L. distinguendus against Different Storage Pests

Sexy Mouth Odour? Male Oral Gland Pheromone in the Grain Beetle ParasitoidLariophagus distinguendus(Förster) (Hymenoptera: Pteromalidae)

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