Is assessment of oviposition sites using conspecific larval cues a general mechanism in aphidophagous ladybirds (Coccinellidae)?

Magro, Alexandra; Hill, Marjorie A.; Gómez, Mónica; Hemptinne, Jean‐Louis

doi:10.1111/jen.12342

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…[30]). However, they are small and dull coloured, which probably explains why there is so little information available on their chemical ecology and life history in general, compared to ladybirds in some other tribes [25].…”

Section: Discussionmentioning

confidence: 99%

First report of fatty acid-derived alkaloids produced by species of the ladybird genus Scymnus (Coccinellidae: Coleoptera)

Magro¹,

Ramon‐Portugal²,

Touboul³

et al. 2023

Comptes Rendus. Chimie

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Section: Discussionmentioning

confidence: 99%

First report of fatty acid-derived alkaloids produced by species of the ladybird genus Scymnus (Coccinellidae: Coleoptera)

Magro¹,

Ramon‐Portugal²,

Touboul³

et al. 2023

Comptes Rendus. Chimie

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“…By doing so, they avoid foraging and laying eggs in colonies already visited and thus decrease the risk of competition, cannibalism, and/or intraguild predation to their offspring (Doumbia et al, 1998 ; Nakashima et al, 2006 ; Raymond et al, 2000 ). Interestingly, aphidophagous ladybirds tend to avoid tracks of ladybird species with which they coevolved but react less to species from which they are further away in the phylogenetic tree (Magro et al, 2007 , 2010 , 2017 ). Intraspecific and interspecific avoidance generates resource partitioning because areas on plants that were already visited by conspecifics are avoided by subsequent individuals (Gil et al, 2004 ).…”

Section: Natural Processes Of Evolution and Biological Controlmentioning

confidence: 99%

“…Interestingly, aphidophagous ladybirds tend to avoid tracks of ladybird species with which they coevolved but react less to species from which they are further away in the phylogenetic tree (Magro et al, 2007(Magro et al, , 2010(Magro et al, , 2017. Intraspecific and interspecific avoidance generates resource partitioning because areas on plants that were already visited by conspecifics are avoided by subsequent individuals (Gil et al, 2004).…”

Section: Evolution Of Intra and Interspecific Interactions Within Gui...mentioning

confidence: 99%

Biological control needs evolutionary perspectives of ecological interactions

Sentis

Hemptinne

Margo

et al. 2022

Evolutionary Applications

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While ecological interactions have been identified as determinant for biological control efficiency, the role of evolution remains largely underestimated in biological control programs. With the restrictions on the use of both pesticides and exotic biological control agents (BCAs), the evolutionary optimization of local BCAs becomes central for improving the efficiency and the resilience of biological control. In particular, we need to better account for the natural processes of evolution to fully understand the interactions of pests and BCAs, including in biocontrol strategies integrating human manipulations of evolution (i.e., artificial selection and genetic engineering). In agroecosystems, the evolution of BCAs traits and performance depends on heritable phenotypic variation, trait genetic architecture, selection strength, stochastic processes, and other selective forces. Humans can manipulate these natural processes to increase the likelihood of evolutionary trait improvement, by artificially increasing heritable phenotypic variation, strengthening selection, controlling stochastic processes, or overpassing evolution through genetic engineering. We highlight these facets by reviewing recent studies addressing the importance of natural processes of evolution and human manipulations of these processes in biological control. We then discuss the interactions between the natural processes of evolution occurring in agroecosystems and affecting the artificially improved BCAs after their release. We emphasize that biological control cannot be summarized by interactions between species pairs because pests and biological control agents are entangled in diverse communities and are exposed to a multitude of deterministic and stochastic selective forces that can change rapidly in direction and intensity. We conclude that the combination of different evolutionary approaches can help optimize BCAs to remain efficient under changing environmental conditions and, ultimately, favor agroecosystem sustainability.

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“…For example, females can determine the current levels of competition based on the number of competitors present in an area (e.g., Brown 1988), but it may be more difficult to assess future competition for their developing offspring. Females could assess future competition between offspring based on the number of eggs or larvae already in a patch (Messina and Renwick 1985;Magro et al 2017). Females may also be able to estimate future competition based on the number of other ovipositing females at the same site.…”

Section: Introductionmentioning

confidence: 99%

Do Female Red Flour Beetles Assess both Current and Future Competition during Oviposition?

2019

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Female insects must assess multiple factors when laying eggs, including both abiotic and biotic conditions of the laying site. Competition may also play a crucial role in the oviposition decisions of females. Competition at oviposition sites may take two forms: current competition between adults for both food and access to sites for oviposition, and future competition between offspring that will hatch and develop at that site. Here, we test whether female red flour beetles (Tribolium castaneum) assess both current and future competition at oviposition sites with a laboratory experiment where we manipulated both the density (current competition) and sex ratio (future competition) of adults at potential oviposition sites. We counted the number of eggs laid in each site to assess oviposition decisions, and then let those eggs develop into adults to determine the fitness consequences of oviposition decisions (measured by the total number of adult offspring produced). Female red flour beetles responded to both density and sex ratio: per capita eggs laid decreased as density increased, but was higher when the sex ratio was male-biased. These oviposition decisions were reflected in the per capita number of adult offspring produced. We provide evidence that female red flour beetles do assess for both current and future competition in their oviposition decisions.

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Is assessment of oviposition sites using conspecific larval cues a general mechanism in aphidophagous ladybirds (Coccinellidae)?

Cited by 3 publications

References 23 publications

First report of fatty acid-derived alkaloids produced by species of the ladybird genus Scymnus (Coccinellidae: Coleoptera)

First report of fatty acid-derived alkaloids produced by species of the ladybird genus Scymnus (Coccinellidae: Coleoptera)

Biological control needs evolutionary perspectives of ecological interactions

Do Female Red Flour Beetles Assess both Current and Future Competition during Oviposition?

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