Results 41 to 50 of about 19,313 (296)

Sperm phylogeny of Characidae (Teleostei, Characiformes)

open access: yesZoologica Scripta, 2022
AbstractThe phylogeny of the very diverse Neotropical fish family Characidae has been the subject of several recent contributions based on morphological characters, molecular data or both in combined analyses. In cases of conflict between these kinds of data, resolution by combined analyses most often tends to agree with the molecular evidence, given ...
Juan Marcos Mirande   +3 more
openaire   +2 more sources

Hyphessobrycon nicolasi (Teleostei: Characidae) a new species from the Uruguay River basin in the Mesopotamian Region, Argentina [PDF]

open access: yes, 2010
Hyphessobrycon nicolasi is described from the Uruguay River basin in the Mesopotamian Region, Entre Ríos, Argentina. The new species can be distinguished from all congeners by the presence of a well-defined oblique and marginal black stripe on each lobe ...
Lopez, Hugo Luis   +1 more
core   +3 more sources

Larvae of migratory Characiformes species in an archipelago in the Lower Amazon River

open access: yesActa Scientiarum: Biological Sciences, 2021
In the Amazon basin, most of the migratory Characiformes species represent an important fishing resource for local people. However, the lack of information about the main areas and periods of reproduction and the importance of certain environments for ...
Lucas Silva de Oliveira   +2 more
doaj   +1 more source

Molecular variants in populations of Bryconamericus aff. iheringii (Characiformes, Characidae) in the upper Paraná river basin - doi: 10.4025/actascibiolsci.v35i2.11451

open access: yesActa Scientiarum: Biological Sciences, 2012
There are evidences that Bryconamericus aff. iheringii represents a species complex. DNA molecular markers have been effective in studies on phylogeny, taxonomy, and identification of cryptic species. In this study, partial sequences of genes of ATPase 6
Camila Montoro Mazeti   +3 more
doaj   +1 more source

First record of Astyanax puka Mirande, Aguilera & Azpelicueta, 2007 (Teleostei: Characidae) in Juramento River basin, Salta, Argentina [PDF]

open access: yes, 2014
Astyanax puka was described from the endorheic Río Salí basin, Argentina, and it was not previously recorded elsewhere, being considered until now as endemic from that basin.
Aguilera, Gaston   +2 more
core   +1 more source

The piranha genome provides molecular insight associated to its unique feeding behavior [PDF]

open access: yes, 2019
The piranha enjoys notoriety due to its infamous predatory behavior but much is still not understood about its evolutionary origins and the underlying molecular mechanisms for its unusual feeding biology.
Adolfi, Mateus   +9 more
core   +2 more sources

Illustrated list of additions to the ichthyofauna of the Caura River, Venezuela [PDF]

open access: yesCheck List, 2012
Twenty nine species have been added to the annotated checklists of the ichthyofauna of the Caura River Basin, Guiana Shield, Venezuela. Of these, 18 were found in two floodplain lagoons in the lower Caura, corresponding to the orders Characiformes ...
Nirson González   +3 more
doaj   +3 more sources

Cytotaxonomic and evolutionary considerations about karyotipic data of fishes from the Iguaçu River Basin in South of Brazil

open access: yesBrazilian Archives of Biology and Technology, 2007
The cytogenetic data available in the literature about the ichthyofauna of the Iguaçu River basin were analyzed in this review. The ichthyofauna was characterized by the high level of endemism and by the low diversity of species.
Daniel Luis Zanella Kantek   +4 more
doaj   +1 more source

First record of Jupiaba acanthogaster (Eigenmann, 1911) (Ostariophysi, Characidae) in the upper Paraná river basin, Brazil [PDF]

open access: yesCheck List, 2020
Jupiaba Zanata, 1997 is a genus with small species within Characidae, identified by a pair of modified bones in the form of spines just anteriorly to pelvic-fin base. The genus is mostly distributed throughout the Amazon drainage, except J. acanthogaster
Douglas Alves Lopes   +3 more
doaj   +3 more sources

Zygoparity in Characidae - the first case of internal fertilization in the teleost cohort Otomorpha [PDF]

open access: yesNeotropical Ichthyology, 2020
Most teleosts are externally fertilizing, with internal fertilization occurring as a relatively rare event. Until now, Euteleosteomorpha is the only teleost cohort known to undergo internal fertilization.
Clayton Kunio Fukakusa   +2 more
doaj   +1 more source

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