https://opendata.uni-halle.de//handle/1981185920/13579 Fri, 17 Apr 2026 01:22:36 GMT 2026-04-17T01:22:36Z https://opendata.uni-halle.de//handle/1981185920/122632 Title: Data Set “Morphology and function of the sternal gland in two species of mason bee” Author(s): Krüger, Stephanie; Seidelmann, Karsten Abstract: Raw pictures of the sternal glands and data of the behavioral assay to test the effect of male-specific carboxylic ester in two species of mason bees, Osmia bicornis and O. cornuta (Hymenoptera: Megachilidae). This data were used to analyze function of male pheromones produced in the sternal gland. Data: Raw data are provided as Tab delimited ASCII (".txt"), decimal separator ".". The structure of the files and the content of the Variables is declared in "Description_data.txt". List and association of files: A list of all the files, along with their association with different microscopic techniques or data sets, can be found in the "readme.txt" file. Species: Osmia bicornis, Osmia cornuta: Insecta, Hymenoptera, Apidae, Megachilidae, Osmiini Methodology: Light and electron microscopy to analyze the morphology and ultrastructure of the sternal gland Attraction test with tethered males in the field Methods as described in the publication. Pictures: The files contain the raw image format, with no editing applied. The embedded metadata can be obtained from the image files. Additional metadata information is provided in a metadata file with the same name as the image, if necessary. These files have the extensions ".XML" or ".xlif". Descriptions of image content are provided in ".txt" files. Additional images not included in the publication can be requested from the authors. Wed, 01 Oct 2025 00:00:00 GMT https://opendata.uni-halle.de//handle/1981185920/122632 2025-10-01T00:00:00Z https://opendata.uni-halle.de//handle/1981185920/112778 Title: 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. Fri, 29 Sep 2023 00:00:00 GMT https://opendata.uni-halle.de//handle/1981185920/112778 2023-09-29T00:00:00Z https://opendata.uni-halle.de//handle/1981185920/41741 Title: Von Hippel-Lindau-Protein, cAMP-responsives Element-bindendes Protein- und Hypoxie-abhängige Veränderungen im Metabolismus des Nierenzellkarzinoms (Dataset) Author(s): Leisz, Sandra Tue, 30 Nov 2021 00:00:00 GMT https://opendata.uni-halle.de//handle/1981185920/41741 2021-11-30T00:00:00Z https://opendata.uni-halle.de//handle/1981185920/38270.2 Title: 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. Fri, 27 Aug 2021 00:00:00 GMT https://opendata.uni-halle.de//handle/1981185920/38270.2 2021-08-27T00:00:00Z