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Division of labor in colonies of the eusocial wasp, Mischocyttarus consimilis.

Torres VO, Montagna TS, Raizer J, Antonialli-Junior WF - J. Insect Sci. (2012)

Bottom Line: In order to observe temporal polyethism, each newly emerged wasp was marked with colored dots on the upper area of the thorax.This allowed the observation of behavioral acts performed by each worker from the time of emergence to its death.Hybrid multidimensional scaling characterized two groups, with intra-nest activities preferentially accomplished by younger workers, while extra-nest activities such as foraging were executed more frequently by older workers.

View Article: PubMed Central - PubMed

Affiliation: Laboratório de Ecologia, Centro Integrado de Análise e Monitoramento Ambiental, Universidade Estadual de Mato Grosso do Sul, 351, 79804-907, Dourados-MS, Brazil. vivianabio@yahoo.com.br

ABSTRACT
The division of labor between castes and the division of labor in workers according to age (temporal polyethism) in social wasps are crucial for maintaining social organization. This study evaluated the division of labor between castes, and the temporal polyethism in workers of Mischocyttarus consimilis Zikán (Hymenoptera: Vespidae). To describe the behavioral repertory of this species, observations were made of 21 colonies, with 100 hours of observations. In order to observe temporal polyethism, each newly emerged wasp was marked with colored dots on the upper area of the thorax. This allowed the observation of behavioral acts performed by each worker from the time of emergence to its death. Through hybrid multidimensional scaling, a clear division between queens and workers could be identified, in which the behaviors of physical dominance and food solicitation characterized the queen caste; while behaviors such as adult-adult trophallaxis, destruction of cells, alarm, foraging for prey, foraging for nectar, and unsuccessful foraging characterized the worker caste. Hybrid multidimensional scaling characterized two groups, with intra-nest activities preferentially accomplished by younger workers, while extra-nest activities such as foraging were executed more frequently by older workers.

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Analysis of division of labor between queen and worker castes by means of ordination by hybrid multidimensional scaling, in two dimensions (stress = 0.25), of the nests of Mischocyttarus consimilis (21 records for queens, filled circles; 21 records for workers, empty circles) according to the 30 defined behavioral acts. The vectors represent the behavioral acts that contributed most to the ordination (r > 0.5). Cl = physical dominance, C8 = food solicitation characterized the repertory of queens, C4 = adult—adult trophallaxis, C14 = destruction of cells, C22 = alarm, C26 = foraging for prey, C27 = foraging for nectar, C30 = unsuccessful foraging characterized the workers' repertory, C23 = immobility was common to both castes. High quality figures are available online.
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f02_01: Analysis of division of labor between queen and worker castes by means of ordination by hybrid multidimensional scaling, in two dimensions (stress = 0.25), of the nests of Mischocyttarus consimilis (21 records for queens, filled circles; 21 records for workers, empty circles) according to the 30 defined behavioral acts. The vectors represent the behavioral acts that contributed most to the ordination (r > 0.5). Cl = physical dominance, C8 = food solicitation characterized the repertory of queens, C4 = adult—adult trophallaxis, C14 = destruction of cells, C22 = alarm, C26 = foraging for prey, C27 = foraging for nectar, C30 = unsuccessful foraging characterized the workers' repertory, C23 = immobility was common to both castes. High quality figures are available online.

Mentions: A clear division between the behaviors performed by workers and queens was apparent from the sample ordination by HMDS (Figure 2). The right side showed a more significant performance by the workers, and the left a more significant performance by the queens. Caste significantly explained the ordination pattern (Pillai's Trace = 0.736; F = 54.355; gl= 2 and 39; p < 0.01). As seen in Figure 2, the behaviors that contributed most to separate the two castes were: physical dominance (C1) and food solicitation (C8), which characterized the repertory of the queens; and adult—adult trophallaxis (C4), destruction of cells (C14), alarm (C22), foraging for prey (C26), foraging for nectar (C27), and unsuccessful foraging (C30), most of these related to the maintenance of the colony, characteristic of worker repertory. Immobility (C23) was common to both castes.


Division of labor in colonies of the eusocial wasp, Mischocyttarus consimilis.

Torres VO, Montagna TS, Raizer J, Antonialli-Junior WF - J. Insect Sci. (2012)

Analysis of division of labor between queen and worker castes by means of ordination by hybrid multidimensional scaling, in two dimensions (stress = 0.25), of the nests of Mischocyttarus consimilis (21 records for queens, filled circles; 21 records for workers, empty circles) according to the 30 defined behavioral acts. The vectors represent the behavioral acts that contributed most to the ordination (r > 0.5). Cl = physical dominance, C8 = food solicitation characterized the repertory of queens, C4 = adult—adult trophallaxis, C14 = destruction of cells, C22 = alarm, C26 = foraging for prey, C27 = foraging for nectar, C30 = unsuccessful foraging characterized the workers' repertory, C23 = immobility was common to both castes. High quality figures are available online.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472919&req=5

f02_01: Analysis of division of labor between queen and worker castes by means of ordination by hybrid multidimensional scaling, in two dimensions (stress = 0.25), of the nests of Mischocyttarus consimilis (21 records for queens, filled circles; 21 records for workers, empty circles) according to the 30 defined behavioral acts. The vectors represent the behavioral acts that contributed most to the ordination (r > 0.5). Cl = physical dominance, C8 = food solicitation characterized the repertory of queens, C4 = adult—adult trophallaxis, C14 = destruction of cells, C22 = alarm, C26 = foraging for prey, C27 = foraging for nectar, C30 = unsuccessful foraging characterized the workers' repertory, C23 = immobility was common to both castes. High quality figures are available online.
Mentions: A clear division between the behaviors performed by workers and queens was apparent from the sample ordination by HMDS (Figure 2). The right side showed a more significant performance by the workers, and the left a more significant performance by the queens. Caste significantly explained the ordination pattern (Pillai's Trace = 0.736; F = 54.355; gl= 2 and 39; p < 0.01). As seen in Figure 2, the behaviors that contributed most to separate the two castes were: physical dominance (C1) and food solicitation (C8), which characterized the repertory of the queens; and adult—adult trophallaxis (C4), destruction of cells (C14), alarm (C22), foraging for prey (C26), foraging for nectar (C27), and unsuccessful foraging (C30), most of these related to the maintenance of the colony, characteristic of worker repertory. Immobility (C23) was common to both castes.

Bottom Line: In order to observe temporal polyethism, each newly emerged wasp was marked with colored dots on the upper area of the thorax.This allowed the observation of behavioral acts performed by each worker from the time of emergence to its death.Hybrid multidimensional scaling characterized two groups, with intra-nest activities preferentially accomplished by younger workers, while extra-nest activities such as foraging were executed more frequently by older workers.

View Article: PubMed Central - PubMed

Affiliation: Laboratório de Ecologia, Centro Integrado de Análise e Monitoramento Ambiental, Universidade Estadual de Mato Grosso do Sul, 351, 79804-907, Dourados-MS, Brazil. vivianabio@yahoo.com.br

ABSTRACT
The division of labor between castes and the division of labor in workers according to age (temporal polyethism) in social wasps are crucial for maintaining social organization. This study evaluated the division of labor between castes, and the temporal polyethism in workers of Mischocyttarus consimilis Zikán (Hymenoptera: Vespidae). To describe the behavioral repertory of this species, observations were made of 21 colonies, with 100 hours of observations. In order to observe temporal polyethism, each newly emerged wasp was marked with colored dots on the upper area of the thorax. This allowed the observation of behavioral acts performed by each worker from the time of emergence to its death. Through hybrid multidimensional scaling, a clear division between queens and workers could be identified, in which the behaviors of physical dominance and food solicitation characterized the queen caste; while behaviors such as adult-adult trophallaxis, destruction of cells, alarm, foraging for prey, foraging for nectar, and unsuccessful foraging characterized the worker caste. Hybrid multidimensional scaling characterized two groups, with intra-nest activities preferentially accomplished by younger workers, while extra-nest activities such as foraging were executed more frequently by older workers.

Show MeSH