The adaptation of biological species to their environment depends on traits. When various processes occur (survival, reproduction, migration, etc.), the trait distribution may change with respect time and space. In context invasions, when considering evolution a heritable that encodes dispersive ability individuals, develops particular spatial structure leads acceleration front propagation. Tha...

A survey of spatial and temporal variation in the frequency of electrophoretically defined genotypes in the geometrid moth Alsophila pometaria revealed a high diversity of uncommon or rare asexual genotypes and clinal distributions of two of the more common clones. There was substantial year-to-year variation in genotype frequencies in seven of eleven sites. Progeny tests have revealed that sex...

Botryllus schlosseri is a colonial ascidian, and the closest relative to vertebrates that can completely regenerate its entire body, including all somatic and germline tissues, using an asexual developmental pathway called blastogenesis. This regenerative potential exhibited by Botryllus and other colonial ascidians does not exist in any other chordate and makes B. schlosseri a promising model ...

All-female sperm-dependent species are particular asexual organisms that must coexist with a closely related sexual host for reproduction. However, demographic advantages of asexual over sexual species that have to produce male individuals could lead both to extinction. The unresolved question of their coexistence still challenges and fascinates evolutionary biologists. As an alternative hypoth...

This paper uses findings from research diaries to explore the use of practices of intimacy among asexual people. While much of the literature to date has focused on the supposedly transformative and political nature of uniquely asexual practices of intimacy our findings suggest something different. Rather than seeking to transform the nature of intimate relationships asexual people make pragmat...

Symbiotic interactions of C3 grasses with fungal endo-phytes, Epichloe species and their asexual relatives Neoty-pkodium, often provide the grass hosts with major fitness enhancements (for review, see Siegel and Bush [1994]). The endophytes protect host plants from both biotic and abiotic environmental stresses. Documented enhancements to host fitness include greater resistance to mammalian and...

In the aquatic realm, asexual reproduction is rare in most phyla. However, it is common among protozoa, coelenterata (e.g. Hydroid polyps budding medusae), cladocera (e.g. parthenogenesis of Daphnia sp.), and among tunicates (thaliacea). Salps alternate between sexual and asexual reproduction (metagenesis), and doliolids have two asexual and one sexual stage in their lifecycle (Paffenhöfer and ...