Results 71 to 80 of about 7,748 (216)
Abstract Pyrrhulina australis Eigenmann & Kennedy, 1903, is widely distributed across the main hydrographic basins of South America. The taxonomic integrity of this species is nevertheless challenged by the lack of clear diagnostic characters, its marked geographic variation and the morphological overlap with its congeners. In this context, the present
Taina Barbosa De Souza +6 more
wiley +1 more source
Vicarious trial and error [PDF]
When rats come to a decision point, they sometimes pause and look back and forth as if deliberating over the choice; at other times, they proceed as if they have already made their decision. In the 1930s, this pause-and-look behaviour was termed 'vicarious trial and error' (VTE), with the implication that the rat was 'thinking about the future'.
openaire +2 more sources
Use of dispersal–vicariance analysis in biogeography – a critique
Aim Analytical methods are commonly used to identify historical processes of vicariance and dispersal in the evolution of taxa. Currently, dispersal–vicariance analysis implemented in the software diva is the most widely used method.
Kodandaramaiah, Ullasa
core +1 more source
The Neotropical freshwater ichthyofauna has among the highest species richness and density of any vertebrate fauna on Earth, with more than 5,600 species compressed into less than 12% of the world’s land surface area, and less than 0.002% of the world’s ...
Roberto E. Reis +10 more
doaj +1 more source
Reining in Vicarious Liability
The English law of vicarious liability has changed dramatically over the course of the last 20 years. The overall effect of this transformation has been a significant expansion in the scope of the doctrine, accompanied by high levels of uncertainty, as reflected in the frequency with which appeals on the subject have been heard by the Supreme Court in ...
openaire +2 more sources
The phenotypic structure within and between plant populations is generally influenced by their distribution patterns in space and time; therefore, the study of their divergence is a central issue for the understanding of their microevolutive processes ...
Felipe Benavides +4 more
doaj
Hemos reunido evidencia de que Heraclides está formado por dos subespecies, cada una con caracteres propios que las distinguen; analizamos, describimos y nominamos a Heraclides androgeus reyesorum ssp. nov. que se distribuye en la costa pacífica mexicana.
Isabel Vargas-Fernández +2 more
doaj
The morphological adaptations of simplidactylate landhoppers to life out of standing water primarily involve changes in gill and pleopod structure. Recognition of significant and consistent differences in these structures within the simplidactylate ...
Alan A. Myers, Olivier J.-P. Ball
doaj +1 more source

