Distribution of<i>Cotesia rubecula</i>(Hymenoptera: Braconidae) and Its Displacement of<i>Cotesia glomerata</i>in Eastern North America

Herlihy, Megan V.; Driesche, Roy G. Van; Abney, Mark; Brodeur, Jacques; Bryant, Alexandria; Casagrande, Richard A.; Delaney, Deborah A.; Elkner, Timothy E.; Fleischer, Shelby J.; Groves, R. L.; Gruner, Daniel S.; Harmon, Jason P.; Heimpel, George E.; Hemady, K.; Kuhar, Thomas P.; Maund, Christopher M.; Shelton, Anthony M.; Seaman, Abby; Skinner, Margaret; Weinzierl, Richard A.; Yeargan, Kenneth V.; Szendrei, Zsofia

doi:10.1653/024.095.0230

Cited by 23 publications

(24 citation statements)

References 20 publications

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“…The cabbage white's faster life history may facilitate it avoiding many predators and parasites in its novel range (Geervliet et al, ; Wiskerke & Vet, ), and therefore, weaken these trade‐offs among vital rates. The success of Cotesia rubecula as a biocontrol agent for cabbage white in North America (Chew et al, ; Herlihy et al, ; Van Driesche, ) supports the evolution of increase competitive ability hypothesis (i.e., release from natural enemies increases competitiveness of invasive species) for the cabbage white (Blossey & Notzold, ; Fordyce et al, ). This hypothesis suggests that life history trade‐offs may not necessarily be resource‐based for the cabbage white butterfly, which is a common assumption when trade‐offs are observed.…”

Section: Discussionmentioning

confidence: 91%

Life history trade‐offs are more pronounced for a noninvasive, native butterfly compared to its invasive, exotic congener

2019

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Life history trade-offs are ubiquitous in nature. Life history theory posits that these trade-offs arise from individuals having limited resources to allocate toward all vital functions, such as survival, growth and reproduction. These trade-offs position most species along a slow-fast life history continuum, where individuals with slow life histories often have higher survival at the cost of delayed reproduction and individuals with fast life histories often live faster and die younger. However, these trade-offs are sometimes less obvious for invasive species. Here, we constructed age-based population models to compare life history strategies and trade-offs between the noninvasive, native mustard white and invasive, exotic cabbage white (Pieris spp.) butterflies. We found that the cabbage white has faster larval growth and higher fecundity at younger ages, suggesting it has a fast life history compared to the mustard white. However, cabbage white also has higher adult survival at younger ages, suggesting that it experiences weaker trade-offs among vital rates than its native counterpart.Our study illustrates the importance of demographic studies in evaluating life history strategies among congener species with different population histories, and emphasizes the many advantages experienced by invasive species in their novel environments. K E Y W O R D Scomparative demography, matrix models, Pieris, slow-fast continuum, vital rates

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Section: Discussionmentioning

confidence: 91%

Life history trade‐offs are more pronounced for a noninvasive, native butterfly compared to its invasive, exotic congener

2019

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“…) or from the immigration of individuals from other released C. rubecula populations (see (Herlihy et al. ) for the most current assessment of the North American distribution of C. rubecula ). In part, the pace of this recovery might be associated with the number of CSD loci.…”

Section: Discussionmentioning

confidence: 99%

“…We observed a relatively low rate of diploid male production in the field in 2015 suggesting an increase of at least one allele and a likely increase of five to six alleles in the population between 2005 and 2015 (Table 3). Such an increase might result from the mutation of new alleles (Hasselmann et al 2008) or from the immigration of individuals from other released C. rubecula populations (see (Herlihy et al 2012) for the most current assessment of the North American distribution of C. rubecula). In part, the pace of this recovery might be associated with the number of CSD loci.…”

Section: Discussionmentioning

confidence: 99%

Balancing selection maintains sex determining alleles in multiple‐locus complementary sex determination

2017

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Hymenopteran species in which sex is determined through a haplo-diploid mechanism known as complementary sex determination (CSD) are vulnerable to a unique form of inbreeding depression. Diploids heterozygous at one or more CSD loci develop into females but diploids homozygous at all loci develop into diploid males, which are generally sterile or inviable. Species with multiple polymorphic CSD loci (ml-CSD) may have lower rates of diploid male production than species with a single CSD locus (sl-CSD), but it is not clear if polymorphism is consistently maintained at all loci. Here, we assess the rate of diploid male production in a population of Cotesia rubecula, a two-locus CSD parasitoid wasp species, approximately 20 years after the population was introduced for biological control. We show that diploid male production dropped from 8-13% in 2005 and 2006 to 3-4% by 2015. We also show from experimental crosses that the population maintained polymorphism at both CSD loci in 2015. We use theory and simulations to show that balancing selection on all CSD alleles promotes polymorphism at several loci in ml-CSD populations. Our study supports the hypothesis that ml-CSD populations have lower diploid male production and are more likely to persist than comparable sl-CSD populations.

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“…The dominant parasitoid species were identified using diagnostic morphological characters described by Van Driesche (2008). The key parasitoids of P. rapae, the dominant lepidopteran pest in our system, are Cotesia glomerata and Cotesia rubecula (Herlihy et al 2012), and were the species we focused on in our analyses. While C. glomerata is a gregarious parasitoid of several species of pierid butterflies, C. rubecula is a solitary host-specific parasitoid of P. rapae larvae (Benson et al 2003).…”

Section: Arthropod Samplingmentioning

confidence: 99%

Contrasting effects of landscape composition on crop yield mediated by specialist herbivores

Pérez-Álvarez

Nault

Poveda

2018

Ecological Applications

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Landscape composition not only affects a variety of arthropod-mediated ecosystem services, but also disservices, such as herbivory by insect pests that may have negative effects on crop yield. Yet, little is known about how different habitats influence the dynamics of multiple herbivore species, and ultimately their collective impact on crop production. Using cabbage as a model system, we examined how landscape composition influenced the incidence of three specialist cruciferous pests (aphids, flea beetles, and leaf-feeding Lepidoptera), lepidopteran parasitoids, and crop yield across a gradient of landscape composition in New York, USA. We expected that landscapes with a higher proportion of cropland and lower habitat diversity would lead to an increase in pest pressure of the specialist herbivores and a reduction in crop yield. However, results indicated that neither greater cropland area nor lower landscape diversity influenced pest pressure or yield. Rather, pest pressure and yield were best explained by the presence of non-crop habitats (i.e., meadows) in the landscape. Specifically, cabbage was infested with fewer Lepidoptera in landscapes with a higher proportion of meadows likely resulting from increased parasitism. Conversely, cabbage was infested with more flea beetles and aphids as the proportion of meadows in the landscape increased, suggesting that these pests benefit from non-crop habitats. Furthermore, path analysis confirmed that these landscape-mediated effects on pest populations can have either positive or negative cascading effects on crop yield. Our findings illustrate how different pest species within the same cropping system show contrasting responses to landscape composition with respect to both the direction and spatial scale of the relationship. Such tradeoffs resulting from the complex interaction between multiple-pests, natural enemies, and landscape composition must be considered, if we are to manage landscapes for pest suppression benefits.

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Distribution ofCotesia rubecula(Hymenoptera: Braconidae) and Its Displacement ofCotesia glomeratain Eastern North America

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 23 publications

References 20 publications

Life history trade‐offs are more pronounced for a noninvasive, native butterfly compared to its invasive, exotic congener

Life history trade‐offs are more pronounced for a noninvasive, native butterfly compared to its invasive, exotic congener

Balancing selection maintains sex determining alleles in multiple‐locus complementary sex determination

Contrasting effects of landscape composition on crop yield mediated by specialist herbivores

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