DSpace Collection:https://opendata.uni-halle.de//handle/1981185920/135792024-03-29T06:49:48Z2024-03-29T06:49:48ZAge-related changes in cuticular hydrocarbon bouquet and same-sex sexual behavior of mason bee males (Osmia bicornis and O. cornuta) (Dataset)Seidelmann, Karstenhttps://opendata.uni-halle.de//handle/1981185920/1127782023-09-30T01:13:41Z2023-09-29T00:00:00ZTitle: Age-related changes in cuticular hydrocarbon bouquet and same-sex sexual behavior of mason bee males (Osmia bicornis and O. cornuta) (Dataset)
Author(s): Seidelmann, Karsten
Abstract: Finding a mate is the central task in the lives of many male insects. In many solitary bees, sexual competition between males is high due to monandry and a pronounced male-biased sex ratio. Males searching for females will inspect and mount any object of suitable size and habitus. Species, sex, and reproductive status are encoded in the bee’s bouquet of cuticular hydrocarbons (CHCs) and can only be identified at a short distance from the object encountered. In two species of mason bees, this CHC-based system for recognizing newly emerged, virgin females is not error-free. Newly emerged individuals of both sexes carry similar CHC bouquets, facilitating the confusion of newly emerged males with newly emerged, virgin females. Misidentification leads to same-sex sexual behavior by males seeking a mate. However, individuals of both sexes modify their CHC bouquet sex-specifically within a few days. The changes in the bouquet prevent further sexual harassment. In addition, within three days of emergence, males begin to release species-specific carboxylic acid esters, which may act as courtship-inhibiting pheromones to extend the range of their sex-specific scent tag. Due to the pronounced protandry of both species, SSB is restricted to the early flight season, when females are not yet present, and imposes no apparent cost on the two males involved.2023-09-29T00:00:00ZVon Hippel-Lindau-Protein, cAMP-responsives Element-bindendes Protein- und Hypoxie-abhängige Veränderungen im Metabolismus des Nierenzellkarzinoms (Dataset)Leisz, Sandrahttps://opendata.uni-halle.de//handle/1981185920/417412021-11-30T21:01:54Z2021-11-30T00:00:00ZTitle: Von Hippel-Lindau-Protein, cAMP-responsives Element-bindendes Protein- und Hypoxie-abhängige Veränderungen im Metabolismus des Nierenzellkarzinoms (Dataset)
Author(s): Leisz, Sandra2021-11-30T00:00:00ZIndividual Scent-Marks of Nest Entrances in the Solitary Bee, Osmia cornuta (Hymenoptera: Megachilidae) (Dataset)Seidelmann, KarstenFrahnert, Konrad, Sebastianhttps://opendata.uni-halle.de//handle/1981185920/38270.22021-11-25T01:10:36Z2021-08-27T00:00:00ZTitle: Individual Scent-Marks of Nest Entrances in the Solitary Bee, Osmia cornuta (Hymenoptera: Megachilidae) (Dataset)
Author(s): Seidelmann, Karsten; Frahnert, Konrad, Sebastian
Abstract: This data set contains raw data on the composition of nest scent marks (tags), on Dufour’s gland extracts and body (head) washes of females of the horn-faced mason bee, Osmia cornuta (Hymenoptera: Megachilidae). This data were used to analyze individuality in scent tags of nests and similarity of tag composition with the odor bouquet of the nesting female.2021-08-27T00:00:00ZTerritoriality is just an option: allocation of a resource fundamental to the resource defense polygyny in the European wool carder bee, Anthidium manicatum (Hymenoptera: Megachilidae) (Dataset)Seidelmann, Karstenhttps://opendata.uni-halle.de//handle/1981185920/374882021-10-19T13:10:51Z2021-07-05T00:00:00ZTitle: Territoriality is just an option: allocation of a resource fundamental to the resource defense polygyny in the European wool carder bee, Anthidium manicatum (Hymenoptera: Megachilidae) (Dataset)
Author(s): Seidelmann, Karsten
Abstract: The wool carder bee Anthidium manicatum is one textbook example of resource defense polygyny among solitary bees, known for intense male–male competition, forced copulations, and the extreme form of interspecific territoriality toward other flower visitors. This mating system depends on the spatial structure of the defended resource and requires several adaptations in males. The allocation of patches with host plants as well as male body size and phenology was analyzed over 3 years in the diverse habitat of a botanical garden. Anthidium manicatum males searched in groups up to 12 individuals a wide diversity of patches with various food plants of foraging females. Territories were established in small high-quality patches only. Males abandoned aggressive and territorial behavior in large patches. Available patches were occupied by males of the various body size fractions independently of each other according to patch profitability. The higher competitive weight of large males in small patches compared to spacious ones was balanced by an opposing correlation of patch profitability. Although the mating system in A. manicatum is clearly a resource defense polygyny, males were found to be plastic in their behavior, and territoriality was not consistently observed. Mate acquiring tactics, be they territory holder (bourgeois), sneaker, floater, or scrambler for mating, can be considered to be different behavioral phenotypes within one environmentally sensitive conditional strategy.2021-07-05T00:00:00Z