ScienceDirect - Trends in Ecology & Evolution : A major evolutionary transition to more than two sexes? J.D. Parker hypothesizes that there might exist four sexes in the Pogonomyrmex barbatus X rugosus hybrid system.
Science News About Ant and Other Social Insect Research
Friday, January 23, 2004
Tuesday, January 13, 2004
Wednesday, January 07, 2004
Apidologie: Dampney et al. show for honeybees, that 'anarchistic' egg-laying workers have lower work rate compared to wild-type workers, which "counterbalances the increased personal fitness of anarchist bees and partly explains the extreme rarity of anarchic honey bee colonies."
Apidologie: Guzmàn-Novoa et al., based on behavioral experiments, suggest for honeybees that "more defensive bee types guard longer and may affect the thresholds of response of less defensive bees, recruiting them to sting" and: "the individual performance of different defensive tasks cause interactions that result in increased colony response".
Friday, January 02, 2004
Journal of Biogeography: Community organization and species richness of ants (Hymenoptera/ Formicidae) in Mongolia along an ecological gradient from steppe to Gobi desert:
Pfeiffer et al. present the, in their words, "first comprehensive study of ant communities in Mongolia, conducted along a north-to-south gradient in climate". They baited ants with seeds and collected 15 species (Cataglyphis, Formica, Lasius, Leptothorax, Messor, Myrmica, Plagiolepis, Proformica, Tetramorium; Cataglyphis aenescens and Messor aciculatus). Their main conclusion: "The ant communities in the Mongolian steppe and desert zones were strongly influenced by low temperatures and differed in many aspects from the ant fauna in other arid ecosystems, especially in terms of species richness, diversity of feeding guilds, and richness of functional groups."