Eusocial insect queens are remarkable in their ability to maximise both fecundity and longevity, thus escaping the typical trade-off between these two traits. Several mechanisms have been proposed to underlie the remoulding of the trade-off, such as reshaping of the juvenile hormone pathway, or caste-specific susceptibility to oxidative stress. However, it remains a challenge to disentangle the molecular mechanisms underlying the remoulding of the trade-off in eusocial insects from caste-specific physiological attributes that have subsequently...
1. Animals may respond to ecological heterogeneity by genetic differentiation or phenotypic plasticity. Responses of organisms to their ecology can include adaptation at various levels of organization, including morphology, behaviour and social structure. Adaptations at one level might con-strain or enhance adaptations on other levels, which highlights the importance of understanding their interactions. 2. In highly social animals, understanding the influence of ecology on the evolution and maintenance of complex social organization poses an intriguing...
The collections of basal arthropods including Opiliones at the Zoological Research Museum Alexander Koenig Bonn
The ichthyological collection at the Zoological Research Museum Alexander Koenig contains mainly freshwater fishes, with emphasis on South American and later on European, African and Asian species.
Midgut transcriptome assessment of the cockroach-hunting wasp Ampulex compressa (Apoidea: Ampulicidae)Manuela Sann, Jovana M. Jasso-Martínez, Alexander Donath, Dieter Schulten & Alejandro Zaldívar-Riverón
The emerald jewel wasp Ampulex compressa (Hymenoptera: Ampulicidae) is a solitary wasp that is widely known for its specialized hunting of cockroaches as larvae provision. Adult wasps mainly feed on pollen and nectar, while their larvae feed on the cockroachs’ body, first as ecto- and later as endoparsitoids. Little is known about the expression of digestive, detoxification and stress-response-related genes in the midgut of A. compressa, or about its transcriptional versatility between life stages. To...
Genomic signals of admixture and reinforcement between two closely related species of European sepsid fliesMartin Kapun, Athene Giesen, Wolf U Blanckenhorn, Martin A Schäfer, Kentaro K Shimizu, Rie Shimizu-Inatsugi, Bernhard Misof, Oliver Niehuis, Lars Podsiadlowski, Heidi E L Liescher & Simon Aeschbacher
Interspecific gene flow by hybridization may weaken species barriers and adaptive divergence, but can also initiate reinforcement of reproductive isolation through natural and sexual selection. However, the extent of interspecific gene flow and its consequences for the initiation and maintenance of species barriers in natural systems remain poorly understood. We first applied coalescence simulations and approximate Bayesian calculations based on microsatellite data to infer the yet unknown demographic history of the two closely related European...
Image-based automated species identification: Can virtual data augmentation overcome problems of insufficient sampling?Morris Klasen, Jonas Eberle, Dirk Ahrens & Volker Steinhage
Automated species identification and delimitation is challenging, particularly in rare and thus often scarcely sampled species, which do not allow sufficient discrimination of infraspecific versus interspecific variation. Typical problems arising from either low or exaggerated interspecific morphological differentiation are best met by automated methods of machine learning that learn efficient and effective species identification from training samples. However, limited infraspecific sampling remains a key challenge also in machine learning. In this study, we assessed whether...
Sexual dimorphism in an adaptive radiation: Does intersexual niche differentiation result in ecological character displacement?Benjamin D. Wasiljew, Jobst Pfaender, Benjamin Wipfler, Mariam Gabelaia, Ilham Vermandra Utama, Letha Louisiana Wantania & Fabian Herder
Evolutionary radiations are one plausible explanation for the rich biodiversity on Earth. Adaptive radiations are the most studied form of evolutionary radiations and ecological opportunity has been identified as one factor permitting them. Competition among individuals is supposedly highest in populations of conspecifics. Divergent modes of resource use might minimize trophic overlap, and thus intersexual competition, resulting in ecological character displacement between sexes. However, the role of intersexual differentiation in speciation processes is insufficiently studied....
Zoological Research Museum Alexander Koenig8
University of Freiburg3
National Autonomous University of Mexico1
University of Zurich1
University of Bern1
Autonomous University of Yucatán1
University of Sao Paulo1
Indonesian Institute of Sciences1
University of Bonn1