Results 71 to 80 of about 7,748 (216)

Cryptic diversity and recent diversification in the Pyrrhulina australis species complex (Characiformes, Lebiasinidae) revealed by mitochondrial DNA

open access: yesJournal of Fish Biology, Volume 109, Issue 3, Page 1771-1785, September 2026.
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]

open access: yesNature Reviews Neuroscience, 2016
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

open access: yes, 2009
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

Aquatic Biodiversity in the Amazon: Habitat Specialization and Geographic Isolation Promote Species Richness

open access: yesAnimals, 2011
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

open access: yesIndustrial Law Journal, 2020
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

Inferring possible population divergence in Espeletia pycnophylla (Asteraceae) through morphometric and paleogeographic approaches

open access: yesRevista de Biología Tropical, 2010
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  

Vicarious ostracism [PDF]

open access: yesFrontiers in Human Neuroscience, 2013
Wesselmann, Eric D.   +2 more
openaire   +3 more sources

Una nueva subespecie de Heraclides androgeus (Lepidoptera: Papilionidae) y sus aspectos biogeográficos A new subspecies of Heraclides androgeus (Lepidoptera: Papilionidae) and its biogeographical aspects

open access: yesRevista de Biología Tropical, 2013
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  

A Revision of the Arcitalitridae Myers & Lowry, 2022 (Amphipoda, Talitroidea): Establishment of New Families and Observations on the Origin and Evolution of Simplidactylate Landhoppers

open access: yesDiversity
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

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