Larval development of Physocephala (Diptera, Conopidae) in the bumble bee Bombus morio (Hymenoptera, Apidae)

Abdalla, Fábio Camargo; Sampaio, Guilherme; Pedrosa, Marina; Sipriano, Thamiris Porto; Domingues, Caio Eduardo C; Silva-Zacarín, Elaine C.M.; Camargo, Daiane Almeida de

doi:10.1590/s0085-56262014000400003

Cited by 11 publications

(10 citation statements)

References 22 publications

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“…Conopids kill their bumble bee hosts 10–12 d after infection (Schmid‐Hempel and Schmid‐Hempel , Abdalla et al. ); therefore, in the model, parasitized bees continue to forage for 10 d before perishing. In some scenarios, we also model diminished foraging capacity with increasing maturity of the parasitoid (see Resource inflow and consumption submodel ).…”

Section: Methodsmentioning

confidence: 99%

“…For a given forager, the time they have flown within a model day is multiplied by the parasitism risk, which for our purposes is an empirically estimated value representing the increase in the likelihood of conopid parasitism per hour of foraging time, and varies through the season (see Defining the resource and risk environment empirically: Conopid parasitism risk). Conopids kill their bumble bee hosts 10-12 d after infection (Schmid-Hempel and Schmid-Hempel 1996, Abdalla et al 2014); therefore, in the model, parasitized bees continue to forage for 10 d before perishing. In some scenarios, we also model diminished foraging capacity with increasing maturity of the parasitoid (see Resource inflow and consumption submodel).…”

Section: Colony Simulation Modelmentioning

confidence: 99%

“…This host–parasitoid association extends across much of the geographic range of bumble bees, including North America (Freeman ), Europe (Schmid‐Hempel and Durrer ), Asia (Maeta and MacFarlane ), and South America (Abdalla et al. ). Conopids attack bumble bees in flight or on flowers (Goulson ).…”

Section: Introductionmentioning

confidence: 99%

“…Ten to 12 days after hatching, the larva fills the entire abdominal cavity of its host, and the bee expires (Schmid‐Hempel and Schmid‐Hempel , Abdalla et al. ). Shortly afterward, the larva pupates.…”

Section: Introductionmentioning

confidence: 99%

“…Conopid flies (Conopidae, Diptera) are prominent endoparasitoids of bumble bees, sometimes infecting the majority of free-flying individuals in the wild population at a given location (70% [Schmid-Hempel and Schmid-Hempel 1990], 62% [Schmid-Hempel and Durrer 1991], 60% [Gillespie 2010], 80% ). This host-parasitoid association extends across much of the geographic range of bumble bees, including North America (Freeman 1966), Europe (Schmid-Hempel and Durrer 1991), Asia (Maeta and MacFarlane 1993), and South America (Abdalla et al 2014). Conopids attack bumble bees in flight or on flowers (Goulson 2010).…”

Section: Introductionmentioning

confidence: 99%

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The influence of conopid flies on bumble bee colony productivity under different food resource conditions

Malfi

Walter

Roulston

et al. 2018

Ecological Monographs

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Floral resources and natural enemies are considered important drivers of wild bee population dynamics, yet there is little information on how these factors, either independently or in combination, influence the demographic performance of bees. Bumble bees (Bombus spp.), ecologically important social insects, have long colony cycles lasting many weeks. Food shortfalls during the colony lifetime can result in smaller colony sizes and lower reproductive output. Conopid flies (Conopidae, Diptera) are prevalent endoparasitoids of bumble bees, often infecting high percentages of free‐flying individuals. Conopids can reduce worker life span and foraging efficiency; consequently, they may negatively affect colony success. In this study, we evaluated how seasonal variability in food resources and conopid parasitism together influence the productivity of bumble bee colonies through construction of a simulation model. In addition to simulating colony performance in relation to a defined food environment and conopid‐induced worker mortality, we evaluated how daily background mortality risk and the timing of colony initiation affected growth and reproductive outcomes of colonies, as well as the degree of influence exerted by conopids. Model parameters were largely informed by field data collected from Bombus impatiens colonies at our study site (Blandy Experimental Farm, Boyce, Virginia, USA), including data on forager risk of conopid parasitism as assessed using radio‐frequency identification (RFID) technology. In spite of the high probability of parasitism (4% per hour of flight during seasonal peak) incorporated into our model simulations, lethal parasitism by conopids generally had a modest influence on colony productivity, reducing reproductive output by 15% or less across most tested scenarios. However, conopids were more influential under very low resource conditions, reducing reproductive output by 21–28%. Inclusion of sublethal effects of conopids on foraging activity further reduced colony performance in all scenarios, but had a greater impact on colony performance under the poorest resource conditions. This work emphasizes that the importance of natural enemies to the demographic performance of bees can increase under certain environmental conditions and highlights the value of using models to consider multiple stressors that are difficult to evaluate simultaneously in field experiments.

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Section: Methodsmentioning

confidence: 99%

Section: Colony Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The influence of conopid flies on bumble bee colony productivity under different food resource conditions

Malfi

Walter

Roulston

et al. 2018

Ecological Monographs

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Host-parasitoid interactions between the solitary bee Centris analis (Apidae: Centridini) and conopid flies (Diptera: Conopidae)

Moure˗Oliveira

Hirotsu

Serrano

et al. 2019

Sci Nat

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Pathogens, parasites, and parasitoids associated with bumble bees (Bombus spp.) from Uruguay

et al. 2016

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As elsewhere in the world, bumble bees play a vital role as pollinators in Uruguay, but knowledge on their health status is still limited. Between September 2012 and May 2013, 403 adult individuals of the two species of Bombus known for the country (Bombus atratus , Bombus bellicosus) were collected in six localities. We found that 177 (119 B. atratus , 58 B. bellicosus) were harboring one or two types of pathogens, parasites, or parasitoids. Identification of these natural enemies carried out by morphological or molecular procedures revealed the presence of two species of Microsporidia [Nosema ceranae (prevalence: 18.2 % in B. atratus ; 44.9 % in B. bellicosus), Tubulinosema pampeana (prevalence: 13 % in B. atratus)], two species of Nematoda [Sphaerularia bombi (prevalence: 40.4 % in B. atratus ; 40 % in B. bellicosus) and an unidentified Mermithidae (prevalence: 0.8 % in B. bellicosus)], and one species of Diptera parasitoid (prevalence: 3.2 % in B. atratus ; 4.2 % in B. bellicosus). Except N. ceranae , none of the other species have been previously reported in Uruguay.

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Larval development of Physocephala (Diptera, Conopidae) in the bumble bee Bombus morio (Hymenoptera, Apidae)

Cited by 11 publications

References 22 publications

The influence of conopid flies on bumble bee colony productivity under different food resource conditions

The influence of conopid flies on bumble bee colony productivity under different food resource conditions

Host-parasitoid interactions between the solitary bee Centris analis (Apidae: Centridini) and conopid flies (Diptera: Conopidae)

Pathogens, parasites, and parasitoids associated with bumble bees (Bombus spp.) from Uruguay

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