Playing the hare or the tortoise in parasitoids: could different oviposition strategies have an influence in host partitioning in two<i>Aphidius</i>species?

Baaren, Joan van; Heterier,; Hance, Thierry; Krespi, Liliane; Cortesero, AM; Poinsot, Denis; Ralec, Anne Le; Outreman, Yannick

doi:10.1080/08927014.2004.9522634

Cited by 27 publications

(55 citation statements)

References 18 publications

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“…There is a scarce amount of information in the literature concerning competitive outcomes between the Aphidiinae species in this study, but our results show some indication that such interspecific interactions are not a major factor in determining relative abundance patterns. This can be due to resource partitioning, as Aphidiinae species have been known to exhibit distinct host resource exploitation strategies while exploiting the same host species, thus avoiding detrimental niche overlapping and allowing coexistence (van Baaren et al 2004, Le Lann et al 2012.…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal variations in aphid‐parasitoid relative abundance patterns and food webs in agricultural ecosystems

et al. 2015

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Abstract. Understanding the stability of communities is fundamental in theoretical and applied ecology.Organisms atop trophic chains are particularly sensitive to disturbance, especially when they are dependent on a specific trophic resource subject to strong fluctuations in density and quality, which is the case of parasitoids. We investigated the (1) variability in spatiotemporal relative abundance patterns of a cereal aphid parasitoid community, determining at what scales such patterns vary in agrosystems. We also investigated whether (2) parasitoid relative abundances are strongly influenced by host relative abundances and if (3) different host species are exploited at distinct rates. Aphid parasitoid populations were monitored in three remote agricultural regions in France between 2010 and 2012. Five parasitoid species (Hymenoptera: Braconidae: Aphidiinae) and three aphid species (Hemiptera: Aphididae) were identified in each of those three regions. Fields sampled in one region in a single year exhibited similar relative abundance patterns, with aphid parasitoid communities varying across regions and years. All parasitoid species were able to exploit each monitored host species. Metopolophium dirhodum Wlk was consistently a more frequent species among parasitized aphids than among living aphids, indicating that this aphid species was exploited at a higher rate than the other two aphid species found (Sitobion avenae F and Rhopalosiphum padi L). Those findings suggest the cereal aphid-parasitoid network is not strictly determined by the intrinsic permanent environmental characteristics but partially varies from one year to another. The similarity in abundance patterns in different fields of a region in a given year suggests the existence of a mechanism allowing a rapid synchronisation of the relative abundance patterns at an intraregional scale. This phenomenon could be useful in predicting host-parasitoid communities and bear important consequences for the ecosystem service provided by parasitoids.

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Section: Discussionmentioning

confidence: 99%

Spatiotemporal variations in aphid‐parasitoid relative abundance patterns and food webs in agricultural ecosystems

et al. 2015

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“…Although these two species are closely related, sympatric parasitoid species, they have different thermal tolerance, body size, phenology and response to aphid defensive behaviors (Van Baaren et al, 2004). For instance, these last authors explain that S. avenae defended itself less under the attack of A. avenae compared to the attack of A. rhopalosiphi and that A. avenae totally rejected aphids that were already hosting other parasitoids.…”

Section: Discussionmentioning

confidence: 96%

“…However, it is unknown whether A. avenae parasitized the host before the other parasitoids. In fact, the literature suggests that A. avenae prefers unparasitized hosts and rejects patches with the aphid pheromone alarm (Van Baaren et al 2004). Generalist parasitoids, such as A. avenae, are presumed to decline in their host use efficiency compared to specialist parasitoids, which are more likely to increase the use of shared hosts, taking advantage of the trade-off of generalists (Straub et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

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Abundancia y prevalencia de Aphidius avenae (Hymenoptera: Braconidae: Aphidiinae) en Chile

Peñalver‐Cruz

Ortiz-Martínez

Villegas

et al. 2017

Ciencia e investigación agraria

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A. Peñalver-Cruz, S. Ortiz-Martínez, C. Villegas, Ž. Tomanović, F. Zepeda-Paulo, V. Žikić, and B. Lavandero. 2017. Abundance and prevalence of Aphidius avenae (Hymenoptera: Braconidae: Aphidiinae) in Chile. Cien. Inv. Agr. 44(2): 207-214. During the samplings described here, Aphidius avenae (=picipes) (Haliday, 1834) was collected. This species has been reported in Chile but has never been studied in terms of its relative abundance and prevalence in central and southern Chile by using classical or molecular methods. The composition of the parasitoid assemblages on several cereal aphid hosts was examined for three seasons in agricultural landscapes. In this note, we describe the prevalence of this parasitoid species in cereal aphids and other aphid hosts and discuss the abundance of this parasitoid compared to other aphid parasitoids and the probable origins of this important aphid parasitoid species in Chile. The results indicate that A. avenae has a low prevalence compared to other main parasitoids such as Aphidius ervi (Haliday) and that it has been found parasitizing the grain aphid (Sitobion avenae (Fabricius)) and the bird cherry-oat aphid (Rhopalosiphum padi (Linnaeus)) in wheat and the foxglove aphid (Aulacorthum solani (Kaltenbach)) in tomato. Although the introduction of A. avenae in Chile as a biological agent in 1992 was not successful, we here confirm the presence of this aphid parasitoid wasp in Chile and discuss the factors that could explain the low prevalence of this parasitoid species in the country.

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“…This is not the case when a parasitoid faces a living aphid (Battaglia et al, 1993). A. rhopalosiphi usually starts its oviposition sequence on aphids without antennal contact, approaching the host with the antennae bending backwards (van Baaren et al, 2004). The differences in the behavioral sequence may be due to the nature of the stimulus involved.…”

Section: Discussionmentioning

confidence: 99%

Epicuticular Factors Involved in Host Recognition for the Aphid Parasitoid Aphidius rhopalosiphi

et al. 2006

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Abstract:In insect parasitoids, fitness is dependent on the host finding and recognition abilities of the female. Host recognition cues have been described for various host-parasitoid systems, but are still under investigation in aphid parasitoids. Our study aimed to clarify the respective role of physical and chemical cues in recognition of the aphid cuticle. Shed aphid exuviae were used as an elicitor in order to avoid any influence of color, movement, or volatiles present in a living aphid. We assessed the effect of chemical and heat treatments on the texture of the cuticle by using scanning electron microscopy and tested the recognition of treated cuticles by the parasitoid. We showed that recognition cues of the cuticle can be removed chemically (using combined treatments with n-hexane and methanol). Moreover, heat treatment destroyed the physical texture of the cuticle without significantly reducing parasitoid recognition. In a second step, we showed that epicuticular extracts deposited on pieces of paper triggered female attack behavior. First results concerning the chemical composition of the active extract are presented. This study shows that chemical compounds extractable by organic solvents mediate cuticle recognition by aphid parasitoids.

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Playing the hare or the tortoise in parasitoids: could different oviposition strategies have an influence in host partitioning in twoAphidiusspecies?

Cited by 27 publications

References 18 publications

Spatiotemporal variations in aphid‐parasitoid relative abundance patterns and food webs in agricultural ecosystems

Spatiotemporal variations in aphid‐parasitoid relative abundance patterns and food webs in agricultural ecosystems

Abundancia y prevalencia de Aphidius avenae (Hymenoptera: Braconidae: Aphidiinae) en Chile

Epicuticular Factors Involved in Host Recognition for the Aphid Parasitoid Aphidius rhopalosiphi

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