Results 31 to 40 of about 93,116 (308)

Reduced Adult Neurogenesis in Humans Results From a Tradeoff Rather Than Direct Negative Selection

BioEssays, EarlyView.
Embryonic radial glia (RG) generate neurons, glial cells, and later adult neural stem cells, which sustain adult neurogenesis (top, left to right). Human‐specific genetic modifications (blue arrow), selected to boost early RG neurogenic activity, may lead to premature RG exhaustion and reduced adult neurogenesis in the human brain (bottom).
David Morizet, Laure Bally‐Cuif
wiley   +1 more source

Hymenoptera marking technique [PDF]

Journal of Venomous Animals and Toxins including Tropical Diseases, 2008
In true social hymenopterans, such as many species of bees, wasps and all species of ants, the main characteristics are the overlapping of generations, the care with the offspring and the division of labor among the members of the colony. The first biological feature means that in a same moment there are groups of individuals, with variable ages, that ...
Pereira, A. M., Chaud-Netto, J.
openaire   +7 more sources

Embryogenesis in Myrmicine Ants Combines Features of Short Germ‐Band Development With a Progressive Mode of Segmentation

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Different insect species exhibit remarkable diversity in the developmental trajectories from fertilized eggs to hatching larvae. For three myrmicine ant species, we observe a novel combination of a developmental features: small embryonic primordia, a mode of embryogenesis termed short/intermediate germ‐band development, and progressive establishment of
Chi‐Chun Fang, Arjuna Rajakumar, Andrew Kenny, Ulrich G. Mueller, Ehab Abouheif, David Stein   +5 more
wiley   +1 more source

Successful treatment with a combination of bee venom immunotherapy and omalizumab for recurrent anaphylaxis after honey bee sting

Indian Journal of Allergy Asthma and Immunology, 2021
Hymenoptera venom hypersensitivity reaction affects about 3% of the general population and a higher percentage (14%–43%) in beekeepers. Bee venom immunotherapy (bVIT) is effective in reducing subsequent severe systemic reactions and has a significant ...
P C Kathuria, Manisha Rai, Ghulam Hassan
doaj   +1 more source

Trigonalidae (Hymenoptera) of Madagascar [PDF]

Journal of Hymenoptera Research, 2012
Seven species of the primarily hyperparasitoid family Trigonalidae are reported from Madagascar: Orthogonalys brevis Smith & Tripotin, sp. n., Orthogonalys gigantea Benoit, 1951; O. hova Bischoff, 1933; O. maculata Bischoff, 1933; Orthogonalys parahova Smith & Tripotin, sp. n., O.
Smith,David, Tripotin,Pierre
openaire   +4 more sources

Multiomics Reveal Associations Between CpG Methylation, Histone Modifications and Transcription in a Species That has Lost DNMT3, the Colorado Potato Beetle

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Despite lacking DNMT3, EM‐seq revealed CpG methylation in the Colorado potato beetle. CUT&Tag analysis showed an association of H3K36me3 and H3K27ac with transcription, with H3K36me3 mirroring CpG methylation, demonstrating epigenetic flexibility.
Zoe M. Länger, Elisa Israel, Jan Engelhardt, Agata I. Kalita, Claudia I. Keller Valsecchi, Joachim Kurtz, Sonja J. Prohaska   +6 more
wiley   +1 more source

Limited impacts of simulated soil disturbance by rewilded vertebrates on above‐ and below‐ground biodiversity

Oikos, EarlyView.
Rewilding with locally extinct terrestrial vertebrates has been a popular conservation initiative over the past few decades. Among the animals used for rewilding are the small‐ to medium‐sized vertebrates that forage in the soil and that have been lost from many ecosystems due to habitat destruction or predation by exotic species.
David J. Eldridge, Santiago Soliveres, Heloise Gibb, Jun‐Tao Wang   +3 more
wiley   +1 more source

Eurosta solidaginis‐induced stem galls affect strength and colour of botanical dyes extracted from giant goldenrod (Solidago gigantea)

PLANTS, PEOPLE, PLANET, EarlyView.
With increasing demand for sustainable goods, botanical dyes are of increasing interest and value to consumers, industry and small‐scale artisanal producers. Goldenrod is a widely used dye plant with a long history of traditional use. The impact of the well‐studied goldenrod stem gall produced by Eurosta solidaginis on goldenrod botanical dyes—and the ...
Alexe Indigo, Xiaohong Sun, Paul Manning
wiley   +1 more source

New genus of fossil apoid wasps (Hymenoptera, Apoidea) from the Cretaceous amber of Myanmar

Revista Brasileira de Entomologia, 2018
The new genus †Burmasphex is proposed for two fossil species, †Burmasphex sulcatus sp. nov. and †Burmasphex pilosus sp. nov., described from Myanmar Cretaceous amber.
Gabriel A.R. Melo, Brunno B. Rosa
doaj  

A new species of Ampulicomorpha Ashmead from Eocene French amber, with a list of fossil and extant Embolemidae (Insecta: Hymenoptera) of the world

BSGF - Earth Sciences Bulletin, 2020
Embolemidae is a cosmopolitan but species-poor group of chrysidoid wasps with a scarce fossil record, despite a long evolutionary history since at least the Early Cretaceous. Here, the new species, Ampulicomorpha quesnoyensis sp. nov., is illustrated and
Chény Cédric, Guillam Elvis, Nel André, Perrichot Vincent   +3 more
doaj   +1 more source