Scaptotrigona mexicana

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Scaptotrigona mexicana
Scaptotrigona mexicana.JPG
Scaptotrigona mexicana collecting pollen
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Apidae
Genus: Scaptotrigona
Species:
S. mexicana
Binomial name
Scaptotrigona mexicana

Scaptotrigona mexicana is a species of stingless bee that lives throughout Mexico and is part of the Meliponini tribe. [1] This species is sometimes termed "Pisil Nekmej" and is extensively studied for its medicinal purposes. [2] This species is considered common and abundant throughout Mexico and it has been noted to thrive in tropical environments. [1] [3]

Contents

Taxonomy and phylogeny

S. mexicana is part of the family Apidae and is in the tribe Meliponini. This species was named by Félix Édouard Guérin-Méneville in 1845. [4]

Description and identification

S. mexicana is composed of a queen, female workers, and males within each colony. [5] The males of this species are haploid and the queens single mate, resulting in reproductive colonies throughout the year. [6] This species has been noted to be stingless and have strong jaws with which to bite. [7]

Queen characteristics

The queen is noted to focus on single mating, and colonies are often formed within areas where virgin queens are thought to settle in. The male bees are able to distinguish between a physogastric and a virgin queen, allowing them to strategically form a colony in a place where reproductive success is greater. [8]

Workers

The workers from the same colony maintain identical paternal alleles and one of two maternal alleles, resulting from the single mating habits of the queen. [6] The workers can be identified by the aggressive mannerism with which they protect and defend the nest. [7] Additionally, workers of this species maintain black/dark brown heads, scutellums, metasomas, and abdomens, with no stripes. Their thorax is measured to be around 2.44 mm wide. [9]

Distribution and habitat

Distribution of S. mexicana CIA map of Central America.png
Distribution of S. mexicana

The S. mexicana species is distributed through Central America from the 24th degree to 8th degree northern latitude. [6] This species is noted to inhabit Southeastern Mexico along with around 30 other bee species. [6]

Environmental adaptations

It has been found that the body size, body color, and geographic distribution of stingless bees are correlated. S. mexicana is often found in wet lowlands but primarily in elevated mountain regions, which is supported by the idea that stingless bees of dark color and average size tend to remain in high attitudes.

Colony cycle

Colony growth

Meliponini species inhabiting hollow tree trunk Meliponini nest (8739050148).jpg
Meliponini species inhabiting hollow tree trunk

It has been noted that new colonies of S. mexicana can be formed with 2750 mature pupae and 50 g of brood. [10] This species is noted to inhabit Southeastern Mexico, where it nests in the hollows of tree trunks. [6] S. mexicana lives in these tree cavities where they form colonies by stacking brood cells in the shape of a pyramid. It is possible to distinguish colonies within the species since there are identical paternal alleles. [6] This species has been observed forming drones very close to nests, strategically waiting to create these drones near where a potential virgin queen may be. [8] Additionally, this species tends to forage in trees and shrubs, which helps to enhance its polylectic behavior. They have especially been seen to have high diversity values because of the diverse resources that they live and take resources from. [7]

Drone congregations

The S. mexicana species form large perennial colonies which are divided based by communication methods. They have a tendency to form drone congregations, consisting of approximately 132 colonies. The better the environment and the more steady food supply that exists, the more reproductive swarms and more drones are formed. Based on how these swarms align, there are genetically related colonies formed around a mother nest, thus eventually resulting in the drone formation. [3]

Colony decline

These colonies primarily decline due to deforestation. [10] Due to human alteration of many ecosystems in which these species thrive, there is difficulty in preserving and managing S. mexicana. [7]

Behavior

Queen behavior

It is thought that S. mexicana detect queens and assess their reproductive status based on olfactory signals. A drone of this species can distinguish a physogastric and virgin queen due to the compounds in the queens head. [8] The queens have been noted to have 2 alcohols and 2 nonanols that distinguish them from the drones as a queen ready for reproduction. The abdomen of the virgin queens specifically maintain compounds to attract drones. [8]

Mating selection

Queens of these species are monandrous and have a single mate in the start of a colony cycle. S. mexicana specifically creates drone congregations in order to avoid inbreeding. In this species it is noted that drones are composed of up to 132 various colonies that all maintain varied genes and fitnesses. Male bees from nearby colonies are noted to avoid joining congregations closer to them in an effort to reduce chances of mating with a sister or a close relative. [6] This form of disassortive mating proves an effective behavioral mating system given that the probability of sister-brother mating is decreased and eventually a drone aggregation is able to fission in to many genetically diverse colonies. [6]

Within species communication

These bees have been observed to indicate the presence or lack thereof of food through visual or olfactory marks. Certain forager species choose olfactory marks to indicate specifically rich food sources. [11] Depending on the resources shape and color there are different responses and communication behaviors exhibited by the bee. [12] Additionally, this behavior decreases the competition between nest mates because the bees are able to exploit and find new food sources using their olfactory and visual senses. Individuals tend to leave a scent of food in order to advertise when there is food whether it is far or close to the colony, which helps to indicate to other species the level of competition for such a small or large amount of food. [1]

Kin selection

Genetic relatedness within colonies

Workers within the same colony all have one of two maternal alleles, which guarantees relatedness as offspring of the same queen. This species chooses to forms drones in order to encourage outbreeding which increases the fitness of the colony unlike inbreeding. [6]

Costs and benefits of sociality

As a eusocial species, it has been observed that S. mexicana occasionally exemplify foraging behavior. Additionally, S. mexicana have been seen recruiting nestmates in order to enhance overall communication to enhance food behavior and food consumption. [2]

Worker queen conflict

Given that S. mexicana are monandrous, the genotypes of the workers of each individual colonies does indicate a single patriline, indicated by one paternal allele that each worker carries. [13] Therefore, it is thought that the queen is inseminated by males in order to create more workers with each colony cycle, but the workers themselves are not encouraged by the queen to lay eggs. In a monogamous setting, workers produce males in order to help maximize patrilines and pass on their own genes rather than laying females, a feature that the queen has been noted to prevent. [13] This species is considered common and abundant throughout Mexico and has been noted to thrive in tropical environments. [1] [3]

Human importance

Because this species produces honey and pollen, there is ongoing research to understand the potential utility of managing the species. [2]

Agriculture

S. mexicana are considered to be crop pollinators, as they forage for nectar on crop plants including Pimenta dioica and Coffea arabica . S. mexicana has preference for the following plants as sources of nectar and pollen:

Honey production

S. mexicana production of honey and pollen has been important all across the Yucatan peninsula. [2] S. mexicana is sometimes kept in apiaries when domesticated in order to maximize honey production for commercial use, and the honey of this species has been used in traditional medicine to treat illnesses ranging from coughs and throat aches to cancers and infertility. [2]

Related Research Articles

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<i>Apis nigrocincta</i> Species of bee

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<i>Schwarziana quadripunctata</i> Species of bee

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<i>Trigona spinipes</i> Species of bee

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<i>Tetragonisca angustula</i> Species of bee

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<i>Melipona bicolor</i> Species of bee

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<i>Plebeia remota</i> Species of bee

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<i>Melipona beecheii</i> Species of bee

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<i>Trigona corvina</i> Species of bee

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<i>Melipona subnitida</i> Species of bee

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<i>Scaptotrigona postica</i> Species of bee

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<i>Paratrigona subnuda</i> Species of bee

Paratrigona subnuda, commonly known as the jataí-da-terra, is a species of eusocial stingless bee in the family Apidae and tribe Meliponini. These social bees are prevalent in Neotropical moist forests, including Brazilian Atlantic and other South American forests. They inhabit spherical nests in moist underground environments with their forest habitats. Within their Neotropical habitats the P. subnuda is considered to be a very successful and common species of bee. P. subnuda’s main source of food is pollen and nectar from a large variety of native Mesoamerican tropical plants. They have been extensively studied due to social conflicts arising from single mate behaviors and particular virgin behaviors. P. subnuda also exhibits the particular daily behavior in which they open the nest entrance at dawn and close the entrance at dusk when all their activities are done.

<i>Melipona quadrifasciata</i> Species of bee

Melipona quadrifasciata is a species of eusocial, stingless bee of the order Hymenoptera. It is native to the southeastern coastal states of Brazil, where it is more commonly known as mandaçaia, which means "beautiful guard," as there is always a bee at the narrow entrance of the nest. M. quadrifasciata constructs mud hives in the hollows of trees to create thin passages that only allow one bee to pass at a time. Because they are stingless bees, M. quadrifasciata is often used as pollinators in greenhouses, outperforming honey bees in efficiency and leading to overall larger yields of fruits that were heavier, larger, and contained more seeds.

<i>Melipona scutellaris</i> Species of bee

Melipona scutellaris is a eusocial stingless bee species of the order Hymenoptera and the genus Melipona. It is considered to be the reared Melipona species with the largest distribution in the North and Northeast regions of Brazil, with records from Rio Grande do Norte down to Bahia. Its common name, Uruçu, comes from the Tupi "eiru su", which in this indigenous language means "big bee". Their honey is highly desirable and the materials they create for nests have been proven to be a promising source of antibiofilm agents and to present selectivity against human cancer cell lines at low concentrations compared to normal cells.

<i>Trigona fuscipennis</i> Species of bee

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<i>Lestrimelitta limao</i> Species of bee

Lestrimelitta limao is a neotropical eusocial bee species found in Brazil and Panama and is part of the Apidae family. It is a species of stingless bees that practices obligate nest robbing. They have never been spotted foraging from flowers, an observation that supports their raiding behavior. Because of their lack of hind corbiculae, they must raid to obtain enough protein in their diet in the form of pollen and nectar. Lestrimelitta limao secrete a lemon-scented alarm allomone, from which they receive their name, in order to conduct successful raids. L. limao are hypothesized to produce poisonous honey that is toxic if consumed by humans. Because robber bees are so rare and difficult to observe, there is a limited scope of information available.

References

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