Search results for "castes"
showing 5 items of 5 documents
Sur l'indien et sa progéniture. La construction identitaire depuis le champ de la publicité au Mexique.
2013
International audience; A lo largo de la Historia, las imágenes codificadas han desempeñado un papel irremplazable en la creación de mitos y relatos para justificar lacohesión de las sociedades en torno a un patrimonio. en cada época, los grupos dominantes han plasmado a través de las imágenes su idea deDios, lo bello, la bondad, la existencia, la naturaleza y el amor, dando lugar a íconos que se impusieron como legítimos y se convirtieron en ejesde fundación para civilizaciones enteras. también la raza, la libertad, la riqueza y la patria se tradujeron en símbolos que movieron a las multitudes en los grandes capítulos históricos.El triunfo militar de los españoles posibilitó las instauraci…
Ecological Stoichiometry of Bumblebee Castes, Sexes, and Age Groups
2021
Ecological stoichiometry is important for revealing how the composition of chemical elements of organisms is influenced by their physiological functions and ecology. In this study, we investigated the elemental body composition of queens, workers, and males of the bumblebee Bombus terrestris, an important pollinator throughout Eurasia, North America, and northern Africa. Our results showed that body elemental content differs among B. terrestris castes. Young queens and workers had higher body nitrogen concentration than ovipositing queens and males, while castes did not differ significantly in their body carbon concentration. Furthermore, the carbon-to-nitrogen ratio was higher in ovipositi…
Temporal variations in symbiotic hindgut protist community of the subterranean termite Reticulitermes lucifugus Rossi in Sicily.
2015
The dynamics of symbiotic protist communities of Reticulitermes lucifugus ‘‘Sicily’’ were investigated to assess the effects of seasonal environmental conditions and the termite’s feeding activity. In worker and soldier castes, the total protist population (total abundance), individual species abundances, and species proportions in their hindguts were examined monthly from December 2012 to February 2014. The main protist species taken into account were Dinenympha fimbriata Kirby, D. gracilis Leidy, Pyrsonympha flagellata Gras., Spirotrichonympha flagellata Grassi u. Fo` a, Holomastigotes elongatum Grassi u. Fo`a, and Trichonympha agilis Leidy, while others were not specifically identified, …
L’Inde, une ressource pour penser ? Retour vers les années 1920
2014
Axe 4 OS nat; National audience; no abstract
Data from: How ants acclimate: impact of climatic conditions on the cuticular hydrocarbon profile
2018
1. Organisms from temperate zones are exposed to seasonal changes and must be able to cope with a wide range of climatic conditions. Especially ectotherms, including insects, are at risk to desiccate under dry and warm conditions, the more so given the changing climate. 2. To adjust to current conditions, organisms acclimate through changes in physiology, morphology and/or behaviour. Insects protect themselves against desiccation through a layer of cuticular hydrocarbons (CHC) on their body surface. Hence, acclimation may also affect the CHC profile, changing their waterproofing capacity under different climatic conditions. 3. Here, we investigated the acclimation response of two Temnothora…