Biologie Et Comportement De Cacoxenus Indagator Loew (Dipt., Drosophilidae) Cleptoparasite d'OSMIA Cornuta Latr. (Hym., Megachilidae)

Coutin, R.; Chenon, Roch Desmier De

doi:10.1051/apido:19830308

Cited by 4 publications

(5 citation statements)

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“…The perceived nesting success of early-nesting red mason bees (flight period is from April to June) observed by later-nesting blue and orange-vented mason bees (flight period is from May to August) was manipulated by leaving the nest entrance completely sealed with mud or by drilling two small holes (0.8 mm diameter) through the muddy closure. Complete muddy entrance closure indicated successful nesting of red mason bees from the same year, whereas two small holes in the closure plug indicated the entrance holes of the cleptoparasite Cacoxenus indagator or brood parasitoid Monodontomerus wasps, which in turn indicated unsuccessful nesting of red mason bees from a previous year (if parasitized by C. indagator, which has a one-year life-cycle; Coutin & de Chenon, 1983) or the same year (if parasitized by Monodontomerus spp, which has only a three-week life-cycle; Eves, 1970). Cacoxenus indagator and Monodontomerus species are generalists and use both blue and orange-vented mason bees as hosts in our study areas (personal observations).…”

Section: Setup Of the Experimentsmentioning

confidence: 99%

Selective interspecific information use in the nest choice of solitary bees

et al. 2020

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Most of the studies on learning in bees have focused on the foraging context; we know little about the preferences and cognitive processes in nest-site selection, especially in solitary bees. The majority of the bee species are solitary and in contrast to eusocial bees, solitary bees’ cognition and social information use have remained largely unstudied. Solitary cavity-nesting mason bees (Osmia spp.) are an ideal system to study interspecific information use in nest choice in the wild as many species share similar nesting requirements. Here, we show that the blue mason bee (O. caerulescens) and the orange-vented mason bee (O. leaiana) examine hallmarks of parasitization of the nests of red mason bees (O. bicornis) before deciding where to establish their own nests. They were also presented with contextual cues (geometric symbols) that could be linked to parasitization by observational learning. Subjects subsequently had the choice of nesting in a nest site marked by the symbol that matched, or did not match, the one seen at the parasitized or healthy nest. We show that the bees copied and rejected the symbol of the examined nest manipulated to exhibit successful and unsuccessful nesting, respectively. We conclude that solitary bees use interspecific information in their nest-site selection. In contrast with current theories of species coexistence, niche overlap between species may dynamically change depending on the observed success of surrounding individuals.

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Section: Setup Of the Experimentsmentioning

confidence: 99%

Selective interspecific information use in the nest choice of solitary bees

et al. 2020

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“…This would also eliminate the orientation problem because the flies could quickly find the exit. Thus, flies should eclose at the end of the emergence period of their host, as reported by Coutin & de Chenon (1983). However, not all flies might be freed by their hosts.…”

Section: Introductionmentioning

confidence: 83%

“…Such behaviour is reported for the study species (Juillard, 1947, 1948), as well as for miltogrammine flies (Krombein, 1967). Coutin & de Chenon (1983) state that most larvae of C. indagator move forward to the outermost brood cell after the feeding period in July. By contrast, in the present study, most larvae have not entered the outermost brood cell at the end of February.…”

Section: Discussionmentioning

confidence: 99%

“…Larvae feed on the provisions and, depending on the number of flies present in a brood cell, can reduce the size of the bee or even cause the death of the host larva. Larvae hibernate, pupate in mid‐March and emerge in April shortly after the hosts (Coutin & de Chenon, 1983; Krunić et al , 2005). Up to 28% of the brood cells of O. bicornis may be parasitized by C. indagator (Raw, 1972) and often these flies are the most important cause of larval mortality in O. bicornis (Strohm et al , 2002, Krunić et al , 2005).…”

Section: Methodsmentioning

confidence: 99%

“…After feeding on the provisions in a brood cell, the larvae of C. indagator might move forward to the outermost brood cell or vestibulum (i.e. the empty space behind the final nest closure) and make small holes in the nest closure that serve as exits after eclosion from the puparium (Juillard, 1947, 1948; Coutin & de Chenon, 1983). As a result of their sclerotized mouthhooks and their flexible body, fly maggots appear to be well equipped to perforate and pass through the cell partitions.…”

Section: Introductionmentioning

confidence: 99%

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How can cleptoparasitic drosophilid flies emerge from the closed brood cells of the red Mason bee?

Strohm

2010

Physiological Entomology

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Abstract. Aculeate Hymenoptera provision their progeny with large amounts of food. To protect their investment against brood parasites, females of many bee and wasp species construct brood cells that are hard to penetrate when finally sealed. However, the sealed brood cells also pose a problem for parasites that oviposit in the brood cell during provisioning. Brood parasites are smaller than their host and may lack strong mandibles to break through the solid brood cell walls. Furthermore, in nests built in existing cavities, newly-eclosed brood parasites need information about the location of the nest entrance. In the present study, the mechanisms of emergence are investigated in Cacoxenus indagator Loew (Diptera, Drosophilidae), the major cleptoparasite in nests of the red Mason bee Osmia bicornis L. (Hymenoptera, Megachilidae). Larvae of C. indagator move to brood cells closer to the nest entrance and sometimes make small emergence holes in the final closure of the nest entrance. Nevertheless, approximately one-third of newly-eclosed flies orientate and break through at least one intact cell partition to emerge. Flies make most of their attempts to emerge at the correct side (i.e. the one pointing to the nest entrance, probably by using the shape of the cell partition as a cue). Newly-eclosed flies use their head blister (ptilinum) to exert hydraulic pressure on particles of the cell partitions and produce small holes. Thus, C. indagator exhibits a set of behavioural and physiological adaptations enabling them to successfully emerge even from closed brood cells of their host.

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Production of undersized offspring in a solitary bee

Bosch

2008

Animal Behaviour

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Biologie Et Comportement De Cacoxenus Indagator Loew (Dipt., Drosophilidae) Cleptoparasite d'OSMIA Cornuta Latr. (Hym., Megachilidae)

Cited by 4 publications

References 0 publications

Selective interspecific information use in the nest choice of solitary bees

Selective interspecific information use in the nest choice of solitary bees

How can cleptoparasitic drosophilid flies emerge from the closed brood cells of the red Mason bee?

Production of undersized offspring in a solitary bee

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