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Social nest structure of sweat bee Lasioglossum marginatum (Anthophila: Halictidae)
Vinická, Eliška ; Straka, Jakub (advisor) ; Bogusch, Petr (referee)
Family Halictidae is one of the most socially diverse taxa of bees, and especially one of the genera that belongs in this family. It is the genus Lasioglossum, which includes different types of sociality from solitary behavior to eusociality. Among the species of this genus, one stands out and that is the species Lasioglossum marginatum. Its social behaviour was described in the years 1959-1972 by Plateux-Quén in France. Its sociality is eusocial and is completely unique. In its nests there are dozens to hundrets of individuals, all of which are produced by a single queen. The life cycle of this species is not one-year, as in most species, but is spread over 5(6) years and the queen survives the entire time. It is a univoltine species and therefore produces only one generation of offspring per year. This is not unusual, except that eusocial species in this family are always at least bivoltine with a one-year social cycle. In each year of the five-year cycle, the queen produces only workers. Only in the last year of the cycle are future foudresses and males produced. The purpose of this work is to confirm or disprove Plateux-Quénu's statements. Field experiments were performed from 2020 to 2023 in the Kletnice nature reserve in South Moravia. A total of 354 nests were excavated, and their nest...
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Parental care and sociality in family Halictidae (Anthophila)
Vinická, Eliška ; Straka, Jakub (advisor) ; Klimeš, Petr (referee)
Halictidae is an important family of bees interesting mainly for the diversification of social organisation of individual species. Their sociality ranges from solitary individuals who live and care for their offspring themselves, through species that build common nests, to eusocial colonies in which the reproductive division of labour has developed. Exploring such diversity among closely related species may contribute to understanding the evolution of sociality. Thus, we can observe the development of social organization up to its higher levels, such as eusociality, or conversely, gradual evolutionary regression to solitary individuals. For such research, however, it is necessary to know not only the phylogenetic development but especially a detailed description of social behaviour in individual species. However, there are few such studies. Some of them are summarized in this work.
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