Entering behavior of Gasteruption brachychaetum Schrottky (Hymenoptera, Gasteruptiidae) into a nest of Hylaeus Fabricius (Hymenoptera, Colletidae)

Macedo, Amanda B.; Cordeiro, Guaraci Duran; Alves-dos-Santos, Isabel

doi:10.1590/s0085-56262012005000049

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Tetrapedia curvitarsis and Megachile benigna are considered new records for the state (Moure, 2012;Moure et al, 2012a). Gasteruption brachychaetum, although not a common species in trapnest surveys, were recorded by Macedo et al, (2012) in the campus of the Universidade de São Paulo, in the São Paulo city, Brazil, and its broad distribution (Argentina to Mexico) is summarised in Macedo (2011). The present record is the first since 1935 in the JBRJ (Macedo, 2011) and the second host association with the genus Hylaeus in the Neotropics.…”

Section: Discussionmentioning

confidence: 59%

Unveiling the trap-nesting bees and wasps’ fauna (Hymenoptera: Apocrita) and associated organisms of the Jardim Botânico do Rio de Janeiro, Brazil

Marinho

Vivallo

2020

Pap. Avulsos Zool.

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Urban areas, as cities, are frequently overlooked as refuges for the native fauna. However, these places may support several species and house relevant biodiversity contributing to important ecosystemic functions. Wasps and bees (Hymenoptera: Apocrita) are important faunistic elements acting as predators/parasitoids and pollinators, respectively. Therefore, they must be surveyed and inventoried for conservation purposes, especially in cities located in the Atlantic Forest domain, a ravaged Brazilian biome. Accordingly, this study presents a species list of trap-nesting bees and wasps that occurs at the Jardim Botânico do Rio de Janeiro. The survey was conducted using the trap-nest method. Three types of trap-nests were offered totalizing 1,038 traps: rubber hose, bamboo cane and plastic straw. The plastic straw traps were the most effective followed by the bamboo cane ones at attracting nesting wasps and bees. Between April/2017 and February/2019, 12 foundress species built nests: Tetrapedia curvitarsis (Apidae) (33 nests), Hylaeus sp. (Colletidae) (6), Auplopus cf. rufipes (Pompilidae) (5), Trypoxylon sp. (Crabronidae) (4), Pachodynerus nasidens (Vespidae) (3), Auplopus cf. brasiliensis (Pompilidae), Megachile benigna and Megachile sp. (Megachilidae), Euglossa pleosticta, Euglossa sp., and Eufriesea sp. (Apidae) and Penepodium sp. (Sphecidae) all with one nest. Also, four natural enemies were recorded: Chaenotetrastichus neotropicalis (Eulophidae), Gasteruption brachychaetum (Gasterupteiidae), Caenochrysis crotonis (Chrysididae) and Amobia sp. (Diptera: Sarcophagidae). Most bee nests were restrained to the matrix forest and nearby areas, whereas wasps built their nests predominantly in open areas. Regarding seasonality, bees tended to nest in the summer and early autumn influenced by mean temperature, in contrast of wasps that nested in late autumn, winter and spring, influenced by pluviosity. Besides many rare species, which suggests environmental disturbance, the Jardim Botânico do Rio de Janeiro showed a fairly diverse fauna and shows how forest fragment in cities may harbour important representatives of the native fauna.

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Section: Discussionmentioning

confidence: 59%

Unveiling the trap-nesting bees and wasps’ fauna (Hymenoptera: Apocrita) and associated organisms of the Jardim Botânico do Rio de Janeiro, Brazil

Marinho

Vivallo

2020

Pap. Avulsos Zool.

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“…Of the parasitoid species that attack A. morosus, the predator-inquilines of the genus Gasteruption were the most prevalent, but least detrimental, only parasitising a mean of 1.29 cells per infiltrated nest, with 16.9% of nests being infiltrated. We never observed Gasteruption entering nests of A. morosus, possibly because our nest collections were restricted to cool weather conditions when insect activity was low; it is likely that Gasteruption wait for the adult bee to leave before infiltrating the nest and ovipositing in an open brood cell (Macedo et al, 2012;Parslow et al, 2020). Parasitisation by Gasteruption was only observed in single female nests, which suggests that multifemale nests are guarded by one female while other individuals collect provisions, restricting the opportunity for wasps to oviposit (Parslow et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…The extended development time of Gasteruption in A. morosus nests has been similarly reported in Gasteruption brachychaetum Schrottky, 1906a, larvae in nests of Hylaeus aff. guaraniticus (Schrottky, 1906b) (Macedo et al, 2012). The resulting asynchrony in adult emergence between Gasteruption immatures and host could be attributed to delaying their eclosion until hosts have started establishing new nests, which may explain observations of Gasteruption pupae in overwintering A. morosus nests (L. Hearn, personal observation).…”

Section: Discussionmentioning

confidence: 99%

Parasitoids of the uniquely social colletid bee Amphylaeus morosus (Hymenoptera: Colletidae) in Victoria

Hearn¹,

Stevens²,

Schwarz³

et al. 2021

Mem. Mus. Vic

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Understanding how nest parasites contribute to brood mortality rates in host species is an important step towards uncovering the potential implications for host behaviour. This can be especially important for understanding the evolution of social living, where defence against parasites is often posited as a major benefit of cooperative nesting. Only two parasitoid species have previously been reported for the only known social colletid bee, Amphylaeus morosus: the gasteruptiid wasp, Gasteruption primotarsale, and the mutillid, Ephutomorpha tyla. Here we report six additional parasitoid species of A. morosus: the gasteruptiid wasps G. atrinerve, G. globiceps, G. melanopoda and G. cinerescens; the bombyliid fly Anthrax maculatus; and the mutillid wasp Ephutomorpha aff. varipes. The mechanisms of parasitism for these eight parasitoid species are described in combination with how they operate throughout the host brood rearing period and whether benefits of social nesting vary across the season.

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Temporal dissonance between group size and its benefits requires whole-of-lifecycle measurements

et al. 2022

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The benefits of living in groups drive the evolution of sociality, and these benefits could vary across a life-cycle. However, there may be experimental problems in linking group size at one time in a life-cycle to benefits that only become apparent later on when group size has changed, leading to what we call “temporal dissonance”. In the only known social colletid bee, Amphylaeus morosus, parasite pressures arise at various times throughout the life-cycle from different parasitoid species. Amphylaeus morosus is impacted by eight different parasitoid species operating at different host-colony phenology phases, including five species of Gasteruption wasps, a bombyliid fly and two mutillid wasp species. We found that, as the reproductive season progressed, the number of host adults in a nest declined, often to zero, but the presence of even one adult host female during late brood-rearing stages appeared to offer substantial brood protection against mutillids. We propose that the apparent benefits of colony size at one point in time may not reflect the benefits that become apparent at a later point in the season, leading to a temporal dissonance between group size and its later fitness benefits. We also show that A. morosus is strongly protogynous, with variation in parasitoid pressure across the reproductive phenology distorting operational sex ratios away from initial investment ratios. Combined, our data suggest that seasonal variation in parasitoid pressure may have major consequences for understanding social evolution, but these kinds of consequences are largely unexplored in current studies of insect social evolution.

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Entering behavior of Gasteruption brachychaetum Schrottky (Hymenoptera, Gasteruptiidae) into a nest of Hylaeus Fabricius (Hymenoptera, Colletidae)

Cited by 6 publications

References 7 publications

Unveiling the trap-nesting bees and wasps’ fauna (Hymenoptera: Apocrita) and associated organisms of the Jardim Botânico do Rio de Janeiro, Brazil

Unveiling the trap-nesting bees and wasps’ fauna (Hymenoptera: Apocrita) and associated organisms of the Jardim Botânico do Rio de Janeiro, Brazil

Parasitoids of the uniquely social colletid bee Amphylaeus morosus (Hymenoptera: Colletidae) in Victoria

Temporal dissonance between group size and its benefits requires whole-of-lifecycle measurements

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