Results 31 to 40 of about 1,864 (206)

Redescription of Astyanax multidensEigenmann, 1908 (Characiformes: Characidae), a small characid of the Brazilian Amazon [PDF]

Neotropical Ichthyology, 2013
Astyanax multidensis redescribed based on syntypes and additional specimens from the rio Amazonas at Silves, Amazonas State and Óbidos, Pará State, and the rios Trombetas, Tapajós, Xingú, and Araguaia.Astyanax multidensis distinguished from congeners by the unique combination of five to seven maxillary teeth, 31 to 34 pored lateral-line scales, 20 to ...
Marinho, Manoela M. F., Birindelli, José L. O.   +1 more
openaire   +6 more sources

Feeding Ecology of the Relict Fish Gymnocharacinus-Bergi, a Characid from Southern South-America [PDF]

, 1999
Fil: Escalante, Alicia H.. Universidad Nacional de Mar del Plata. Mar del Plata; ArgentinaFil: Menni, Roberto Carlos. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo.
Escalante, Alicia H., Menni, Roberto Carlos   +1 more
core  

Helminth parasites of alien freshwater fishes in Patagonia (Argentina) [PDF]

, 2018
A survey of the helminth parasites of alien freshwater fishes from Argentinean Patagonia is presented, based on samples taken from 2010 to 2017 and including previous published records.
Flores, Verónica Roxana, Rauque Perez, Carlos Alejandro, Salgado Maldonado, Guillermo, Vega, Rocío Marisol, Viozzi, Gustavo Pedro, Waicheim, María Agustina   +5 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

A new species of the lowland Oligosarcus Günther species group (Teleostei: Ostariophysi: Characidae)

Neotropical Ichthyology
A new characid species is described from the rio Jacuí basin, a coastal drainage from southern Brazil. Itis morphologically most similar to its sympatric congeners Oligosarcus jenynsii and O.
Naércio Aquino Menezes, Alexandre Cunha Ribeiro   +1 more
doaj   +1 more source

Mapping of the 18S and 5S ribosomal RNA genes in Astyanax altiparanae Garutti & Britski, 2000 (Teleostei, Characidae) from the upper Paraná river basin, Brazil

Genetics and Molecular Biology, 2006
Fluorescence in situ hybridization (FISH) was undertaken in order to determinate the chromosomal distribution pattern of 18S and 5S ribosomal DNAs (rDNA) in four populations of the characid fish Astyanax altiparanae from the upper Paraná river basin ...
Carlos Alexandre Fernandes, Isabel Cristina Martins-Santos   +1 more
doaj   +1 more source

Predator avoidance in extremophile fish [PDF]

, 2013
Extreme habitats are often characterized by reduced predation pressures, thus representing refuges for the inhabiting species. The present study was designed to investigate predator avoidance of extremophile populations of Poecilia mexicana and P ...
Arias-Rodriguez, Lenin, Bierbach, David, Herrmann, Nina, Indy, Jeane Rimber, Plath, Martin, Riesch, Rüdiger, Schulte, Matthias, Zimmer, Claudia   +7 more
core   +2 more sources

Ossification of the cranium of Inpaichthys kerri (Characiformes: Acestrorhamphidae) with discussion of paedomorphic traits in the genus

Journal of Anatomy, EarlyView.
In this study, we present a detailed description of the cranial development of Inpaichthys kerri (Characiformes: Acestrorhamphidae), highlighting important topics such as pedomorphic characters and their relationship with ontogeny and phylogeny, as well as ossification sequences unique to the species. Abstract The study of development provides valuable
Yasmim De Santana Santos, Manoela M. F. Marinho   +1 more
wiley   +1 more source

Comparative morphology of gill glands in externally fertilizing and inseminating species of cheirodontine fishes, with implications on the phylogeny of the family Characidae (Actinopterygii: Characiformes)

Neotropical Ichthyology
The structure and form of gill gland among inseminating and externally fertilizing species of the Cheirodontinae are described under light microscopy, scanning electron microscopy, and transmission electron microscopy, and compared to other members of ...
Cristina L. C. de Oliveira, Luiz R. Malabarba, John R. Burns   +2 more
doaj   +1 more source

Studies on the distribution, abundance, growth pattern and dietary habits of Brycinus nurse Ruppel, 1832 (Osteichthyes: Characidae) in the River Jamieson, Nigeria [PDF]

Acta Ichthyologica et Piscatoria, 2001
Aspects of the ecology of Brycinus nurse Ruppel, 1832 in the River Jamieson, Nigeria were studied. B. nurse constituted 19.8% of the characid catch and was unevenly distributed in the river with perennial occurrence in the downstream station.
R.B. Ikomi, F.D. Sikoki
doaj   +3 more sources