Agelaia vicina

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Agelaia vicina
Agelaia vicina hive.jpg
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Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Vespidae
Subfamily: Polistinae
Tribe: Epiponini
Genus: Agelaia
Species:
A. vicina
Binomial name
Agelaia vicina
(de Saussure, 1854)

Agelaia vicina is a species of wasp in the genus Agelaia . They are neotropical social wasps known to have the largest colony sizes and nest sizes among social wasps, with some colonies exceeding over one million individuals. They are predators of land arthropods, consuming both insects and spiders alike. Recent sperm morphology studies have shown that although Vespidae belong to the superfamily Vespoidea, A. vicina may be more phylogenetically related to Apoidea. [1]

Contents

Taxonomy and phylogenetics

A. vicina is a eusocial, swarming member of the subfamily Polistinae, within the tribe Epiponini. The genus Agelaia, includes nine species: A. flavipennis, A. areata, A. angulicollis, A. cajennensis, A. fulvofasciata, A. myrmecophila, A. pallipes, A. yepocapa and A. panamaensis. [2]

Sperm morphology

By analyzing the ultrastructure of A. vicina sperm and comparing it to samples from other species within its superfamily, Vespidae, it has been found that A. vicina may be more closely linked to Apoidea than to Vespidae phylogenetically. [1]

Description and identification

Appearance

Queens of the species are characterized by smaller heads and larger abdomens relative to workers. [3]

Nest structure

A. vicina are known to create outstandingly large nests. The combs themselves are generally horizontal and fairly even, neither convex nor concave. The cells face downward and comb layers are vertically connected by petioles. The bottom combs resemble stratified layers while the top combs expand concentrically to form a singular huge comb. When there are spatial limitations the top most layer stops concentrically expanding, leaving the final shape of the nest to be ellipsoid. The brood is always concentrated near the center of the nest, while peripheral cells are left empty as a means of enveloping the structure. [4]

The nests are built out of foraged plant fibers. [5]

Distribution and habitat

A. vicina are nest-dwelling species. Colonies may build their nests in sheltered, half-exposed, or fully exposed areas. Their distribution is essentially limited to the neotropical region. [2] The species is common relative to its genus due to the characteristic rapid growth of its colonies.

A. vicina is found in Southern Brazil and their nests have been studied in the cities of Sao Paulo and Minas Gerais. [6]

Colony cycle

A. vicina are a swarm-founding species, therefore initiation of a new colony involves a large group of workers and one or more queens. Initial construction of the nest is rapid. However, unlike most swarm-founding species where nest growth is episodic, A. vicina continuously increases the size of its nest. Growth rates have been observed in which the nest size doubles after six months. A. vicina are known to have the largest colony size among social wasps, as colonies may exceed one million adults. They also have a very high brood production rate of several thousand individuals per day. In the dry season there is a large population increase soon followed by reproductive swarming, leading to a steep decline in colony size. During the rainy season, decreases in the production of workers are believed to be due to difficulties in obtaining food. [5]

Behavior

Recruitment to food

All species of the genus Agelaia, including A. vicina lack the characteristic of actively recruiting nestmates to discover sources of food. It appears the most effective foraging strategy for the genus is for individuals to scramble for food on their own. The reason behind this is that when foragers work at the individual level, they are able to exploit the resources in that area more quickly and efficiently than if they took time to recruit nest mates to that area or tried to defend the area from non-nestmates. By behaving as opportunistic, solitary foragers they regularly find untouched food patches and exploit them as rapidly as possible until they are driven out by predators. As a corollary, this means that individuals of the species do not maintain specific foraging territories. [7]

Interaction with other species

Diet

A. vicina have a broad diet relative to other social wasps. Colonies forage for water, plant tissue, protein and carbohydrates. Protein is acquired through the general predation of land arthropods. A. vicina are known to prey most heavily on insects of the order Lepidoptera and Coleoptera. Additionally, spiders are a staple of their diet. The species also consumes insects of the order Dermaptera, Hymenoptera, Heteroptera, Mantodea, Diptera, Neuroptera, Blattodae and Homoptera. [5]

Predators

Much more work has yet to be done on the subject, but it is known that Galbula ruficauda may prey on A. vicina when they are away from their nest. The bird does so by first catching the wasp and then beating it on a branch before swallowing it whole. [8]

Defense

For the duration of the activity period of the colony, most flights that exit the nest are short and unrelated to foraging. However, with a large collection of individuals making these trips at once, a persisting cloud forms. This cloud surrounds the exposed aspect of the nest. It is hypothesized that one of the main functions of this cloud is to block the approach of predators and parasites. [5]

Keystone species

A keystone species is one that affects several organisms in an ecosystem, leading to effects much greater than the species's own proportional abundance. A. vicina has been labeled a keystone species due to their unparalleled nest size, colony size, and high rate of brood production. The diversity of their prey and the immense quantity that is necessary to sustain this high rate of growth affects local populations of these species. [9]

Human importance

Stings

A. vicina stings can lead to intense allergy, anaphylactic reactions, and even death in humans. [10]

Neurotoxins in A. vicina venom

Much research has been done in isolating and understanding the effective aspects of A. vicina venom. A recent study involving Wistar rats involved isolating the neurotoxin AvTx8 and then microinjecting it into the brains of rats to understand its effect on brain activity. It was found that the neurotoxin has effects on GABAergic neurotransmission, increasing the activity of specific inhibitory pathways. By doing so, it reduces defensive behavior in rats by propagating an anti-panic effect. The study suggests that AcTx8, as well as many of the other chemicals found in A. vicina venom, may be used to study mechanisms of the brain and brainstem networks. [11]

Related Research Articles

<span class="mw-page-title-main">Paper wasp</span> Vespid wasps that gather fibers from dead wood and plant stems

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<span class="mw-page-title-main">Polistinae</span> Subfamily of insects

The Polistinae is a subfamily of eusocial wasps belonging to the family Vespidae. They are closely related to the wasps and true hornets of the subfamily Vespinae, containing four tribes. With about 1,100 species total, it is the second-most diverse subfamily within the Vespidae, and while most species are tropical or subtropical, they include some of the most frequently encountered large wasps in temperate regions.

<i>Agelaia</i> Genus of wasps

Agelaia is a genus of Neotropical social wasps, with species from Mexico to northern Argentina. Fifteen of the 31 described species are found in Brazil. These species are swarm founders that nest in cavities. The nest generally is without an envelope.

<i>Apoica pallens</i> Species of wasp

The Central American paper wasp is a nocturnal eusocial wasp. It is famous for its swarm based emigration behavior, and is native to the lowlands of Central and northern South America. This species has developed special night vision adaptations to facilitate their night-time swarming and foraging behavior and has important medicinal properties for the Pankararú people of Brazil.

Apoica flavissima is a paper wasp found primarily in South America. The species is distinguishable by its light coloring, unique single comb nests, and nocturnal nature. A notable feature of this species is the size dimorphism between queens and workers. Unlike most Vespidae wasps, Apocia flavissima queens are smaller than their worker counterparts which results in unique intraspecies relationships.

Brachygastra lecheguana, formerly known as Nectarina lecheguana, is a species of dark paper wasp found across North and South America. It nests in underbrush in grassland-type environments, and produces honey, characteristic of the genus Brachygastra.

<i>Polybia occidentalis</i> Species of wasp

Polybia occidentalis, commonly known as camoati, is a swarm-founding advanced eusocial wasp. Swarm-founding means that a swarm of these wasps find a nesting site and build the nest together. This species can be found in Central and South America. P. occidentalis preys on nectar, insects, and carbohydrate sources, while birds and ants prey on and parasitize them. P. occidentalis workers bite each other to communicate the time to start working.

<i>Synoeca cyanea</i> Species of wasp

Synoeca cyanea, commonly known as the marimbondo-tatu in Brazil, is a swarm-founding eusocial wasp. Native to Brazil and Argentina, S. cyanea is one of the largest and most aggressive species of social wasps and is feared in many rural areas. It begins its colony cycle in the early spring and continues until nest abandonment. Throughout its life, S. cyanea forage sugary substances and animal carcasses for food and wood pulp for its nest. S. cyanea is also known for its strong venom, which is enough to cause haemolytic activity.

<i>Agelaia pallipes</i> Species of wasp

Agelaia pallipes is a species of social paper wasp found from Costa Rica to Brazil, Argentina and Paraguay. A. pallipes is ground-nesting and is one of the most aggressive wasps in South America. This species is a predator of other insects, including flies, moths, and ground crickets, as well as baby birds.

<i>Leipomeles dorsata</i> Species of wasp

Leipomeles dorsata is a neotropical paper wasp that is found across Central America and northern South America. It is a eusocial wasp with little differentiation between reproducing and non-reproducing females. In fact, workers can become temporary reproductives if the main reproductives are killed, allowing reproduction to continue until the main reproductive population recovers. The colony cycles through different ratios of main reproductive females and subordinate reproductive females, starting with few or no primary reproducing females, and increasing until there are only main reproductives.

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Protopolybia exigua is a species of vespid wasp found in South America and Southern Brazil. These neotropical wasps, of the tribe Epiponini, form large colonies with multiple queens per colony. P. exigua are small wasps that find nourishment from nectar and prey on arthropods. Their nests are disc-shaped and hang from the undersides of leaves and tree branches. This particular species of wasp can be hard to study because they frequently abandon their nests. P. exigua continuously seek refuge from phorid fly attacks and thus often flee infested nests to build new ones. The wasps' most common predators are ants and the parasitoid phorid flies from the Phoridae family.

<i>Polybia sericea</i> Species of wasp

Polybia sericea is a social, tropical wasp of the family Vespidae that can be found in South America. It founds its colonies by swarming migrations, and feeds on nectar and arthropods.

<i>Ropalidia romandi</i> Species of wasp

Ropalidia romandi, also known as the yellow brown paper wasp or the yellow paper wasp. is a species of paper wasp found in Northern and Eastern Australia. R. romandi is a swarm-founding wasp, and manages perennial nests. Its nests are known as 'paper bag nests' and have different architectural structures, depending on the substrates from which they are built. The specific name honors Gustave, baron de Romand, a prominent French political figure and amateur entomologist.

<i>Synoeca surinama</i> Species of wasp

Synoeca surinama is a Neotropical swarm-founding wasp of the tribe Epiponini. It is known for its metallic blue and black appearance and painful sting. S. surinama builds nests on tree trunks and can be found in tropical climates of South America. When preparing to swarm, there are a number of pre-swarming behaviors that members of S. surinama colonies partake in, such as buzzing runs and occasional brood cannibalism. In S. surinama, social environmental conditions determine the caste ranks of individuals in the developing brood. Unlike less primitive Hymenoptera species, S. surinama display little morphological variation between egg laying queens and workers. S. surinama wasps visit flowering plants and are considered pollinators. When these wasps sting, the stinger is left in the victim and the wasp ultimately dies.

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<i>Synoeca septentrionalis</i> Species of stinging wasp

Synoeca septentrionalis is one of five species of wasps in the genus Synoeca. It is a swarm-founding wasp that is also eusocial, exhibiting complicated nest structure and defense mechanisms and a colony cycle including a pre-emergence phase and a post-emergence phase. It is typically found in areas from Central to South America. This wasp is one of the larger species of paper wasps and exhibits multiple morphological adaptations as a result of this. Synoeca septentrionalis is known for possessing a very painful sting.

<i>Agelaia multipicta</i> Species of wasp

Agelaia multipicta is a swarm-founding, highly eusocial wasp that lives in Mexico, Argentina, Trinidad and southern Brazil. It nests in natural cavities such as hollow trees and aggressively defends the nest from ants, who are brood predators. The workers and queens are morphologically distinguished by ovarian development as well as external features such as a larger petiole and gaster in the queen. Like other carrion-eating (necrophagous) wasp species, A. multipicta plays a scavenging role in the ecosystem. Agelaia multipicta was described by the Irish entomologist Alexander Henry Haliday in 1836.

Brachygastra scutellaris, a honey wasp, is a Neotropical, swarm-founding species that is found in South America and has a medium-sized population of 100-1000 individuals per colony. It stores large amounts of nectar in its nest for the production of honey, and it was even found that at certain times of the year, the nectar is toxic to humans, as they will extract nectar from hallucinogenic plants, depending on the season.

<i>Polybia paulista</i> Species of wasp

Polybia paulista is a species of eusocial wasp occurring in Brazil, Paraguay, and Argentina.

References

  1. 1 2 Mancini, K. (7 April 2006). "Sperm ultrastructure of the wasp Agelaia vicina (Hymenoptera, Vespidae)". Insectes Sociaux. 53 (3): 333–338. doi:10.1007/s00040-006-0877-6. S2CID   20067233.
  2. 1 2 Silveira, Orlando Tobias (1995). "A New Species of Agelia Lepeletier From Brazilian Amazonia (Hymenoptera: Vespidae; Polistinae)". Journal of New York Entomology. 103 (1): 69–72. JSTOR   25010134.
  3. Sakagami, S.F. (1996). "Morphological caste differences in Agelaia vicina, the Neotropical swarm-founding polistine wasp, with the largest colony size among social wasps (Hymenoptera: Vespidae)". Sociobiology.
  4. Zucchi, Ronaldo (April 1995). "Agelaia vicina, a Swarm-Founding Polistine with the Largest Colony Size among Wasps and Bees (Hymenoptera: Vespidae)". Journal of the New York Entomological Society. 103 (2): 129–137. JSTOR   25010148.
  5. 1 2 3 4 De Oliveira, Otavo A L (2010). "Foraging Behavior and Colony Cycle of Agelaia vicina (Hymenoptera: Vespidae; Epiponini)". Journal of Hymenoptera Research. 19: 4–11. Retrieved 24 September 2014.
  6. Zucchi, Ronaldo (1995). "Agelaia vicina, a Swarm-Founding Polistine with the Largest Colony Size among Wasps and Bees (Hymenoptera: Vespidae)". New York Entomological Society. 103 (2): 129–137. JSTOR   25010148.
  7. Jeanne, Robert L. (1995). "Foraging in Social Wasps: Agelaia Lacks Recruitment to Food (Hymenoptera: Vespidae)" (PDF). Journal of the Kansas Entomological Society. Retrieved 24 September 2014.
  8. Raw, Anthony (1997). "Avian Predation on Individual Neotropical Social Wasps (Hymenoptera, Vespidae) Outside Their Nests". Ornitologia Neotropical.
  9. Paine, R.T. (1995). "A Conversation on Refining the Concept of Keystone Species". Conservation Biology. 9 (4): 962–964. doi:10.1046/j.1523-1739.1995.09040962.x.
  10. Hanson, P.E. (1995). "Economic Importance of Hymenoptera". The Hymenoptera of Costa Rica.
  11. de Oliveira, L (7 January 2005). "Effects of microinjections of neurotoxin AvTx8, isolated from the social wasp Agelaia vicina (Hymenoptera, Vespidae) venom, on GABAergic nigrotectal pathways". Brain Research. 1031 (1): 74–81. doi:10.1016/j.brainres.2004.10.027. PMID   15621014. S2CID   22363846.