Results 61 to 70 of about 12,886 (218)

Observaciones sobre gónadas de algunas especies de peces del Paraná medio

Acta Zoológica Lilloana, 2022
Este artículo trata sobre las gónadas de algunas especies pertenecientes a siete familias de peces Characiformes y Siluriformes que se encuentran en el medio y bajo río Paraná.
Clarice Pignalberi
doaj  

A phylogenetic analysis of Brycon and Henochilus (Characiformes, Characidae, Bryconinae) based on the mitochondrial gene 16S rRNA [PDF]

, 2008
The genus Brycon, the largest subunit of the Bryconinae, has 42 valid species distributed from southern Mexico to the La Plata River in Argentina. Henochilus is a monotypic genus, comprising a single species (H.
HILSDORF, Silva, LIMA, Flávio César Thadeo de, MATSUMOTO, Cristianne Kayoko, OLIVEIRA, Claudio   +3 more
core   +2 more sources

Genome Expansion of ZPB1(a) and ZPC1(a) in Basal Species or Liver Expression of ZPB1a and ZPC1aa in Advanced Species, Two Different Strategies to Ensure Sufficient ZP Synthesis in Teleosts

Integrative Zoology, EarlyView.
We found that teleosts employed two different strategies to ensure sufficient ZP (zona pellucida) synthesis: expansion of ZPB1(a) and ZPC1(a) in basal species or liver expression of ZPB1a and ZPC1aa in advanced species. The N‐terminus of expanded ZPB1(a) or ZPC1(a) and liver‐expressed ZPB1a contains repeated units or low‐complexity regions to form ...
Tian Gao, Suying Ma, Shiyi Zhang, Fan Bai, Lingyao Gan, Wenjing Tao, Feilong Wang, Deshou Wang, Lina Sun   +8 more
wiley   +1 more source

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Neotropical Ichthyology
The brain of Brycon orbignyanus is described as a model for future studies of the gross morphology of the central nervous system in Characiformes. The study of brain gross morphology of 48 distinct taxa of Characiformes, one of Cypriniformes, two of ...
Thiago N. A. Pereira, Ricardo M. C. Castro   +1 more
doaj   +1 more source

Early ontogeny and swimming behavior of larvae of the neotropical fish Prochilodus costatus Valenciennes 1850 and Prochilodus argenteus Spix & Agassiz 1829 (Characiformes: Prochilodontidae) [PDF]

, 2016
Early development of fish larvae is a highly dynamic process and its study may provide important information about ontogenetic development, bioenergetic growth, behaviour, taxonomic characteristics for identification in natural environments ...
Arantes, FP, Godinho, HP, Sales, NAIARA GUIMARAES, Santos, JE, Santos, ML   +4 more
core   +1 more source

A fractal pattern of hierarchical genetic population structure in mixed stocks across fish segregated by dams revealed by genomic resources for curimba Prochilodus lineatus

Journal of Fish Biology, EarlyView.
Abstract Genomic resources, new microsatellite markers and a novel observation of a fractal pattern in the genetic population structure are presented for curimba, Prochilodus lineatus, a freshwater migratory model species of South America. Our main goals were to investigate the presence of mixed fish stocks and the effects of damming‐induced ...
Gabriel M. Yazbeck, Gésica Aparecida Santana Nascimento, Leiliane Campos Carvalho, Raíssa Cristina Dias Graciano, Rosiane de Paula Santos, Rafael Sachetto Oliveira   +5 more
wiley   +1 more source

Comparing lacustrine environments: the importance of the kind of habitat on the structure of fishes

Acta Limnologica Brasiliensia, 2018
Aim Fish diversity in two lentic environments: a lake connected (Barbosa lake) to a river and an artificial reservoir (Ninfeias reservoir) were determined in the dry and rainy periods in 2015. We expected to find more diversity in the connected lake and
Reinaldo José de Castro, Raoul Henry, Carla Ferragut, Mayara Casartelli   +3 more
doaj   +1 more source

Número de vértebras de characiformes do rio Amazonas e seu uso na identificação de larvas do grupo [PDF]

Acta Amazonica, 1988
Vertebras numbers are related to mymere numbers, consequently are a useful tool for identifying the species of fish larvae. We present here vertebrae counts and estimations of the number of myomeres for 29 species of Characiformes which have their ...
Carlos A. R. M. Araujo-Lima, Enila Donald   +1 more
doaj   +1 more source

A new, conspicuously pigmented Pyrrhulina (Teleostei: Characiformes: Lebiasinidae) from the Río Tigre, Loreto, Peru

Journal of Fish Biology, EarlyView.
Abstract A new species of Pyrrhulina is described based on morphological and molecular evidence. Pyrrhulina punctata is distinguished from all congeners by the presence of a series of 7 to 16 irregular blotches of dark pigmentation on the flanks, equally marked in juveniles and adult specimens, the presence of 26–28 lateral‐line scales, 17–21 maxillary
Andre Netto‐Ferreira, Lorena Vieira, Taina Souza, Morgan Ruiz‐Tafur, James Garcia‐Ayala   +4 more
wiley   +1 more source

Is Nematocharax (Actinopterygii, Characiformes) a monotypic fish genus? [PDF]

Genome, 2016
The combination of DNA barcodes and geometric morphometrics is useful to discriminate taxonomically controversial species, providing more precise estimates of biodiversity. Therefore, our goal was to assess the genetic and morphometric diversity in Nematocharax, a controversial monotypic and sexually dimorphic genus of Neotropical fish, based on ...
Barreto, Silvia Britto, Nunes, Lorena Andrade, da Silva, André Teixeira, Jucá-Chagas, Ricardo, Diniz, Debora, Sampaio, Iracilda, Schneider, Horacio, Affonso, Paulo Roberto   +7 more
openaire   +4 more sources